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Dimensioning — edge banding

Content
1. Squareness of the sizing cut.................................................................................................2
2. Straightness of the sizing cut ...............................................................................................3
3. Fibrousness ..........................................................................................................................4
4. Hollow cut..............................................................................................................................5
5. Chatter marks ........................................................................................................................6
6. Level uniformity ....................................................................................................................8
7. Presence of tears and break-offs ..........................................................................................9
8. Edge roughness .................................................................................................................. 10
Content.................................................................................................................................... 13
9. Joint closure........................................................................................................................ 15
10. Mechanical damage........................................................................................................... 16
11. Edge removal..................................................................................................................... 17
12. Geometry ........................................................................................................................... 20
Inhalt ....................................................................................................................................... 23
13. Cutting ............................................................................................................................... 24
14. Profile trimming ................................................................................................................. 34
15. Profile and glue joint scraper ............................................................................................ 46

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Dimensioning

Squarenessof thesizing cut

Straightness ofthe sizing cut

Fibrousness

Hollow cut

Chatter marks

Level
uniformity

Presence oftears andbreak-offs

Edge roughness

1. Squareness of the sizing cut
Quality feature

Squareness of the sizing cut

Definition

The angle between the formatted narrow surface and the workpiece surface (covering
layer side) must be 90° after the formatting of the narrow surface with a joint trimmer ordouble chipper. Any angular deviations from the setpoint angle (= 90°) are notacceptable.
Pragmatic — subjective:• Light gap measurement — precision control square

Measuring
instrument

Theoretical — objective:• Coordinate-measuring device• Height-measuring device

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Measurement
method

8. September 2022

An angle must be measured only in combination with both trimming motors (double
chipping unit and joint trimmer). This measurement must also be performed over several
workpieces (minimum two) with the same setting with MDF material and a workpieceheight of
60 mm.
Light gap measurement — precision control square:
Measurement of the angle between the narrow surface and the top of the workpiece overthe height of the narrow surface. The lower and upper cutting surfaces must have thesame level (workpiece height of 60 mm required). The squareness must be checked on
at least the following four measuring lines.
2

1

3

4
FacingNarrow surface
FacingFigure 1: Measuring the squareness of the sizing cut

Coordinate-measuring device:
Automatic check of the squareness in comparison with a CAD model.
Height-measuring device:
Check of the squareness with the height measuring device.
Decision criteria

The tolerance of the squareness for a carrier material with a workpiece thickness of
60 mm is: ± 0.05 mm.
Light gap measurement — precision control square:
The width of the light gap that forms is evaluated. There must be no significant light gap(light gap approximately 0) between the measuring instrument and the workpiece.

2. Straightness of the sizing cut
Quality feature

Straightness of the sizing cut

Definition

Assessment of the sizing cut with regard to the straightness of the narrow surface,relative to the workpiece length.
The straightness for formatting is determined primarily by a closed glue joint orfunctional layer. If not straight, the gluing process can result in uneven or open
joints.
In addition, during alternating trimming, the straightness is influenced by the
impacts when the trimmer is inserted.

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Measuring instrument

Measurement method

8. September 2022

Pragmatic — subjective:•
Haptic testing (finger test)•
Light gap measurement — straight edge/precision control
squareTheoretical — objective:•
Coordinate-measuring device
Haptic testing (finger test):
In haptic testing, the person performing the test moves their fingertips over thesurface of the narrow surface to strengthen the perception of unevenness.
Light gap measurement — straight edge/precision control square:
To determine the deviations, a precision control square for light gap
measurement is placed on the surface of the carrier material with an angle leg
and the straightness of the narrow surface is measured. The straightness or
flatness of the sizing cut can thus be assessed.
When measuring the light gap with a precision control square, it can be seen in
the backlight whether there are straight or non-straight sections on the narrowsurface. Special attention must also be paid to impacts from alternating trimming.

Decision criteria

The straightness must be within a tolerance zone (demarcated by two parallel
planes) of ± 0.05 mm.
Light gap measurement — straight edge/precision control square:
The width of the light gap between the formatted narrow surface and the precisioncontrol square must be visually assessed and no significant light gap (light gap
approximately 0) must be visible.
Coordinate-measuring device:
The straightness must be within a tolerance zone of ± 0.05 mm.

3. Fibrousness
Quality feature

Fibrousness of the narrow surface

Definition

When the narrow surface is processed and chips created, fibrous surfaces
can form due to chips, cells or cell components not being completely
separated from the material. This can be influenced by the shape of theblade, the blade wear and the fiber cutting direction.
The severity of such effects can vary with different carrier materials.

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Measuring instrument

8. September 2022

Pragmatic — subjective:•
Visual and haptic testing (finger test)•
Measuring magnifier
Pragmatic — objective:•
Reference sample (e.g. in the form of images)
Theoretical — objective:•
Digital microscope•
USB microscope

Measurement method

Particular attention must be paid to the following aspects:•
MDF: fibers protruding over the entire narrow surface•
Chipboards: fibers and loose chip pieces in the middle
layer•
Solid wood: torn pieces of fiber, especially in the edge
area
Visual and haptic testing:
The workpieces are checked visually and haptically over the entire formatted
narrow surface. Visual deviations are considered errors if they are visible tothe naked eye from a viewing distance of 50 cm within 30 seconds.
Measuring magnifier (5x magnification):
As with the visual check, a measuring magnifier can also be used to moreclearly identify protruding fibers.
Digital microscope/USB microscope:
As with the visual check, a microscope can also be used to more clearly
identify protruding chips or fibers. In addition, the results can be measured
and documented with images.

Decision criteria

There must be no significantly visible and/or haptically noticeable protruding
chips or fibers over the entire narrow surface.

4. Hollow cut
Quality feature

Hollow cut

Definition

The shape and position of the hollow cut are the basis for air-tight edge banding.
A hollow cut is created over the height of the narrow surface both for joint
trimming and for double chipping. The hollow cut creates a narrow glue joint.

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Measuring instrument

Measurement method

8. September 2022

Pragmatic — subjective:•
Light gap measurement with precision control square/straightedge•
Feeler gauge
Pragmatic — objective:•
Coordinate-measuring device•
Height-measuring device
To check the hollow cut, MDF carrier materials with a height of min. 38 mm should
be used.
Light gap measurement with precision control square/straight edge:
To determine the deviations, a precision control square for light gap
measurement is placed on the surface of the carrier material with an angle leg
and measured against the narrow surface. The hollow cut can thus be assessed.
When measuring the light gap with a straight edge, the shape of the hollow cut
can be seen in the backlight.
Height-measuring device:
The workpiece must not be warped to ensure that the hollow cut can be measured
correctly with the height-measuring device.

Decision criteria

The hollow cut must always be centered (symmetrically) over the height of thenarrow surface.
Hollow cut created = 0.067 mm (40-mm MDF panel; 4014021260)
Hollow cut created = 0.017 mm (20-mm MDF panel; 4014021260)

5. Chatter marks
Quality feature

Chatter marks

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Definition

8. September 2022

The formatted narrow surface is characterized by wavy processing tracks, whichappear as chatter marks.
Despite the small (within μm range) chatter mark depth t, they are easy to see
with scattered light, as they disperse light falling at an angle and create shadow
effects.
In the case of tools with multiple blades, the cutting kinematics only represent
one blade on the surface produced due to the tolerances. The "shorter" blades
contribute to the chipping work, but they are not visible on the workpiece due totheir shorter length. In addition, vibrations between the tool and the workpiece
can also be a cause (axial runout is decisive).

The chatter marks can be determined by the length and depth of the chatter
mark.
Measuring instrument

Pragmatic — subjective:•
Visual and haptic testing (finger test)•
Contact testing (charcoal pencil) + manual measuring•
Measuring magnifier
Theoretical — objective:•
Digital microscope•
Profile method•
Coordinate-measuring device•
Contour-measuring device•
Optical (camera system/laser)

Measurement method

Only MDF or solid wood carrier materials may be used to evaluate chatter marks
on a formatted workpiece. Ideally, plastic materials can also be used.
Measurement at feed = 20 m/min. There are two different parameters formeasuring procedures:
Chatter mark length

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Chatter mark depth

Visual and haptic testing (finger test):
The entire formatted narrow surface of the workpieces is evaluated visually andhaptically. In haptic testing, the person performing the test moves their fingertips
over the surface of the narrow surface to strengthen the perception of chattermarks. Visual deviations are considered errors if they are visible to the naked
eye from a viewing distance of 50 cm within
30 seconds.
Contact testing (charcoal pencil) + manual measuring:
In order to manually measure chatter marks, they should be highlighted throughcontact testing. Graphite rods can be used here, for example. The color particles
are deposited in the chatter marks when the rods are pressed against the cuttingedge surface. If the chatter mark widths are even, multiple marks should becounted to reduce uncertainty when determining the start and end points by
averaging.
Digital microscope:
As with the visual check, a digital microscope (e.g. dark field illumination) canbe used to evaluate the chatter marks on the narrow surface. In addition, thechatter mark length and width can be measured and documented with the
optimum setting.

Decision criteria

If wave-like chatter marks are visible without optical aids, the workpiece isimmediately considered "not OK."

6. Level uniformity
Quality feature

Level uniformity

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Definition

Level uniformity over the workpiece width for the joint trimmer or over the
workpiece length of the narrow surface for the double chipper.
Tools with several offset sequential trimmers can create small steps andlevel inconsistencies on the narrow surface in the coverage area of the two
cutting segments. The depth of the processing motors relative to each otheris particularly important here. When using double chippers, such atransition occurs at the height of the narrow surface, and at the length of
the narrow surface when using a joint trimmer.

Measuring instrument

Pragmatic — subjective:•
Light gap measurement with precision control
square/straight edge•
Haptic testing (finger test)
Theoretical — objective:•
Digital microscope

Measurement method

Double chipper: measurement on the narrow surface at aworkpiece height of min. 38 mm.
Joint trimmer: measurement on the formatted narrow surface over
the workpiece length.
Haptic testing (fingernail test):
For the haptic testing, the person performing the test moves their fingertips
over the surface against the fibers, especially at the transition, to strengthen
the perception ("cat hair effect").
Light gap measurement with precision control square/straight edge:
By measuring the light gap with a straight edge or precision control square,
any steps on the narrow surface between the cutting surfaces of the twoprocessing motors can be seen in the backlight.
Digital microscope:
As with light gap measurement, the digital microscope is used at a flat angle
and in backlight to examine and document the level uniformity of the narrowsurface.

Decision criteria

In the transition area between the two processing motors, there must beneither a visual projection (contrast change in the overlap area) nor aperceptible transition (step).
Double chipper:
There must be no recognizable transition in the form of a step over the
workpiece height that can be detected visually or with the measuring
devices.
Joint trimmer:
There must be no recognizable transition in the form of a step over the
workpiece length that can be detected visually or with the measuring
devices.

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Quality feature

Presence of tears and break-offs

Definition

When the blade exits at the end of the workpiece, there is a risk of creatingtears if the surface can no longer withstand the processing forces. In solid wood,
this is especially prevalent when processing in a transverse direction. Parts canflake or tear, especially at points where the tool exits with a cutting direction
away from the narrow surface (e.g. in reverse rotation when exiting at theworkpiece corners).
There is also a risk of transverse edges applied in previous processing steps
breaking off.

Fundamentals

VDI 3414 sheet 1

Measuring instrument

Pragmatic — subjective:•
Visual check without tools•
Haptic testing (finger test)

Measurement method

Visual check without tools
The sizing cut of the workpieces is visually examined in good lighting (paying
special attention to the edge and corner areas). Visual deviations are
considered errors if they are visible to the naked eye from a viewing distance of
50 cm within 30 seconds.
Haptic testing (finger test)
For the haptic testing, the person performing the test moves their fingertips
against the fibers over the narrow surface (especially at the transition) tostrengthen the perception ("cat hair effect").

Decision criteria

8. Edge roughness

There must be no visible or noticeable tears on the entire narrow surface andcorners. There must also be no tears or breaks beyond the narrow surface into
the covering layer and/or the transverse edge.

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Quality feature

Edge roughness of the cutting edge (= edge breaks)

Definition

In the case of coated panels, parts of the decorative layer may flake,especially when formatting the narrow surface. While the coating is rather
hard and brittle, the carrier plate is rather soft. If a force is now exerted on
the composite by friction or cutting forces during cutting, this results indifferent stresses and strains in the components. The edge roughness
feature (nicked surface with reference to the edge length) can be divided
into the following types:•
Construction edge
•
Bulge
•
Crack
•
Jagged edge•
Flaking of the decorative layer•
Tears in the decorative layer

Figure 2: Edge roughness

Breakouts that extend beyond the area of the decorative coating into thecarrier material are particularly problematic.
Measuring instrument

Pragmatic — subjective:•
Measuring magnifier (5x magnification)•
Contact testing
Pragmatic — objective:•
Reference sample with grading scale (HOMAG Panel
Dividing)
Theoretical — objective:•
Contour-measuring device (EQUAM, form tester)•
USB microscope•
Digital microscope•
Laser measuring system•
Optical measuring system MSQ (HOMAG Panel Dividing)Formatting
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Measurement method

8. September 2022

Measuring magnifier:Using a measuring magnifier, the edge area is examined for the different
types of edge roughness in 50-mm sections.
Contact testing:In order to manually measure edge roughness, it should be highlighted
through contact testing. Graphite rods can be used here, for example. The
color particles are deposited in the edge roughness when the rods arepressed onto the cutting edge surface, making the characteristics moreeasily recognizable.
Reference sample with grading scale (HOMAG Panel Dividing):
Use the HOMAG Panel Dividing reference sample with grading scale from
1–4.
Digital microscope:
As with a measuring magnifier, a digital microscope can also be used toclearly identify edge roughness. In addition, the results can be measured
and documented with images.

Decision criteria

There must be no visually detectable types of edge roughness in the edge
area over the entire workpiece length that can be detected using thespecified measuring devices.

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Gluing — edge banding

Content
1. Squareness of the sizing cut ................................................................................................ 2
2. Straightness of the sizing cut ............................................................................................... 3
3. Fibrousness .......................................................................................................................... 4
4. Hollow cut ............................................................................................................................. 5
5. Chatter marks........................................................................................................................ 6
6. Level uniformity .................................................................................................................... 8
7. Presence of tears and break-offs.......................................................................................... 9
8. Edge roughness.................................................................................................................. 10
Content ................................................................................................................................... 13
9. Joint closure ....................................................................................................................... 15
10. Mechanical damage .......................................................................................................... 16
10.1 Board material ............................................................................................................... 16
10.2 Edging strip ................................................................................................................... 17
11. Edge removal .................................................................................................................... 1711.1 Peel resistance.............................................................................................................. 18
11.2 Chip tear ....................................................................................................................... 19
12. Geometry........................................................................................................................... 20
12.1 Glue joint width.............................................................................................................. 20
12.2 Edgeband progression ................................................................................................... 21
12.3 Edge material overhangs ............................................................................................... 22
Inhalt ....................................................................................................................................... 23
13. Cutting............................................................................................................................... 24
13.1 Parallelism of the chamfer cut..................................................................................... 26
13.2 Angularity of the straight snipping cut ....................................................................... 26
13.3 Straightness of the snipping cut (edge material thickness ≤ 3 mm)........................... 27
13.4 Evenness of the snipping cut (edge thickness > 3 mm) ............................................. 29
13.5 Processing roughness ................................................................................................ 30
13.6 Presence of tears and break-offs ................................................................................ 30
13.7 Impressions and shiny marks during cutting ............................................................. 32
13.8 Undamaged protective film ......................................................................................... 33
l:\Delivery (A-L)\HOM\HOM_MGEAGX_053\bersetzungsauftrag Qualittskriterien\03_Prod\03b_DTP\03_Work\PDF\Quality criteria EN-US - Qualitätskriterien EN-US.docx

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14. Profile trimming ................................................................................................................ 34
14.1 Parallelism of profile trimming .................................................................................... 35
14.2 Waviness ..................................................................................................................... 36
14.3 Chatter marks .............................................................................................................. 36
14.4 Brinnelling from swinging up ...................................................................................... 37
14.5 Processing roughness ................................................................................................ 39
14.6 Vertical processing transition ..................................................................................... 40
14.7 Horizontal processing transition ................................................................................. 40
14.8 Flushness between the transverse and longitudinal edges........................................ 41
14.9 Impressions and shiny marks during profile trimming ............................................... 43
14.10 Tears (for wooden edges).......................................................................................... 44
14.11 Undamaged protective film ....................................................................................... 45
15. Profile and glue joint scraper............................................................................................ 46
15.1 Profile scraper ............................................................................................................. 46
15.1.1 Uniformity of profile outfeed ..................................................................................... 46
15.1.2 Surface quality ........................................................................................................ 47
15.1.3 Stress whitening ..................................................................................................... 48
15.1.4 Scraper chip form ................................................................................................... 49
15.1.5 Impressions and shiny marks during profile scraping ................................................ 50
15.1.6 Uniform processing ................................................................................................. 51
15.1.7 Waviness................................................................................................................ 52
15.1.8 Chip tear at the rear edge........................................................................................ 53
15.1.9 Transition from the edge material to the covering layer ............................................. 54
15.2 Glue joint scraper ........................................................................................................ 55
15.2.1 No damage to the covering layer ............................................................................. 55
15.2.2 No glue residue in the area of the glue joint.............................................................. 56
15.2.3 Shiny marks with the glue joint scraper .................................................................... 57
15.2.4 Undamaged protective film ...................................................................................... 58

GluingJoint closure

Mechanical damage

Edge removal

Geometry

Board material

Peel resistance

Glue joint width

Edging strip

Chip tear

Edgeband progression

Edgeband overhangs

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9. Joint closure
Joint closure (closed glue joint)
Defects or cavities (furrows and accessible cavities) visible on the surface
in the glue joint between the panel material and edge material (orbetween edge material and edge material).
In order to create a water vapor-proof coating, the surfaces brought into
contact must be fully utilized as a gluing zone.

Regulations
Measuring
instrument

Pragmatic — subjective:• Measuring magnifier (5x to 10x magnification)• Color penetration process• Contact testing• Colored marker test (water-soluble Edding pen)

What?

Quality feature
Definition

Measurement
methodTheoretical — objective:• Microscope (digital/USB)
Measuring magnifier (5x to 10x magnification):
The two front sides and the top and bottom of the second (produced)
workpiece or following workpiece are examined in a well-lit room at anangle of 90° in 5x to
10x magnification.

How?

Color penetration process:
The visible part of the glue joint must first be cleaned with a special
cleaning agent (MarkerR MR79) and then sprayed with permanent red(MarkerR MR68NT). After
3 minutes, the permanent red can be wiped off with a paper towel and thedeveloper (MarkerR MR70) can then be applied. Defects are then shown
as red dots on the glue joint.
Contact testing/colored marker test:
Color particles (e.g. of a graphite pencil or a water-soluble Edding pen)can be deposited into any defects (openings) by pressing the
pencil/marker on the visible part of the glue joint. Defects can then beclearly identified and, if necessary, measured.

Decisioncriteria

Microscope (digital/USB):
As with the visual check, a digital microscope can be used to check thatthe glue joint is closed. In addition, any defects that occur can bemeasured (e.g. average value of the defects in 50-mm sections) anddocumented.
The glue joint must be completely closed.
There must be no defects or cavities on any glue joint of the workpiecethat can be detected using the specified measuring devices.

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10. Mechanical damage
10.1 Board material
Mechanical damage to the panel material
Damage to the panel material after it has left the dimensioning in definedquality must not be visible.
Special attention must be paid to mechanical damage to the panel
material caused by the pressure of the gluing roller on the covering layerof the panel material.
The feature of mechanical damage to the panel material can be divided
into the following types:• Positioned bulges in the covering layer• Flaking and breaks• Serrations

Regulations
Measuring
instrument

Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)

What?

Quality feature
Definition

Theoretical — objective:• Microscope (digital/USB up to 200x magnification)

How?

Measurement
methodVisual check without tools:
The entire workpiece length and the front sides are visually inspectedwith special attention paid to the panel material. Visual deviations are
considered errors if they are visible to the naked eye from a viewing
distance of 50 cm within 30 seconds.
Measuring magnifier (5x to 10x magnification):
The front sides and the top and bottom of the second or following
workpiece are examined in a well-lit room at an angle of 90° in 5x to
10x magnification.
Digital microscope/USB microscope:Same as the visual check, but with the support of measuring instruments
and the possibility to measure and document errors.

Decisioncriteria

There must be no visible damage to the panel material on the entire
workpiece in the direct connection (edge area) to the glue joint that canbe detected with the specified measuring devices.

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10.2 Edging strip
Mechanical damage to the edgeband
The magazine (e.g. edgeband guide), the edgeband transport or
the pressure zone can cause mechanical damage to the edgeband
surface.
In addition, the pressure zone can also cause buckling at the frontedge after the approach section (point 4).
The feature of mechanical damage to the edgeband can be divided
into the following types:• "Deformed" edgeband• Edgeband missing/torn/too short• Unevenness in the edge
• Dents• Scratch marks• Elongated depressions

Regulations
Measuring instrument

Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)• Light gap measurement with straight edge

What?

Quality feature
Definition

Measurement method

Theoretical — objective:• Digital microscope• USB microscope (200x magnification)
Visual check without tools:
The workpieces are visually evaluated over the entire workpiece
length with special attention paid to the edgeband. Visualdeviations are considered errors if they are visible to the naked eye
from a viewing distance of 50 cm within 30 seconds.

How?

Measuring magnifier (5x to 10x magnification):
The top and bottom of the second (produced) or following
workpiece are examined in a well-lit room at an angle of 90° in 5x
to 10x magnification.
Light gap measurement with straight edge:
When measuring the light gap with a straight edge, any scratchmarks on the surface of the edgeband can be seen in the backlight.
Digital microscope/USB microscope:Same as the visual check, but with the support of measuring
instruments and the possibility to measure and document errors.

Decision criteria

11.Edge removal

There must be no visually perceptible damage on the edgeband
over the entire narrow surface in the longitudinal and transverse
direction of the workpiece that can be detected with the specified
measuring devices.

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11.1 Peel resistance
Edge removal — peel resistance
The peel resistance describes the average force measured
perpendicular to the glue joint per test piece width unit that isrequired to continuously separate the two joining parts (panel
material and edgeband) of a glued test piece.

Regulations• DIN EN 1464
• Instructions for the edge removal test
Theoretical — objective:• Material-testing machine(e.g. tensile testing machine MPK SPZ 3K)
Constant peeling of the edgeband with a cross rail feed speed of
100 mm/min and a peeling distance of min. 200 mm.
Evaluation of the average peel resistance, ignoring the first and last
10% of the peeling distance.

What?

Quality feature
Definition

Measuring instrument

How?

Measurement method

Decision criteria

The following average peeling forces in Newton per millimeter ofsample width (N/mm) must be achieved:>= 3 N/mm
As an alternative to the peeling forces, the test is passed in theevent of a substrate breakage (edgeband breaks during the test).

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What?

11.2 Chip tear
Quality feature
Definition

Regulations
Measuring instrument

Edge removal — chip tear-off
The extent to which the adhesive side of the edgeband is covered
with chips is evaluated on the peeled workpiece.
This is to assess the strength of the glue joint and the boundary
layer between the carrier material and the edgeband.
Pragmatic — subjective:• Visual check without tools

Visual check without tools:
The chip tear is evaluated on a peeled edgeband. In thisevaluation, the extent to which the back of the edgeband is covered
with chips is investigated. Visual deviations are considered errors ifthey are visible to the naked eye from a viewing distance of 50 cm
within 30 seconds.

Decision criteria

The adhesion must be rated as very good if 100% of the peeled
edgeband is covered with adhesive as well as with chips/fibers
from the panel material.

How?

Measurement method

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12. Geometry

What?

12.1 Glue joint width
Quality feature
Definition

Regulations
Measuring instrument

Theoretical — objective:• Microscope (digital/USB with 200x magnification)
The glue joint must be measured at measuring points A to G (seeFigure 1: Measurement of the glue joint width).
The arithmetic mean value is calculated from measuring points B to
B+C+D+E+F. The outer measuring points A
F using the formula 𝑥𝑥̅ =5
and G are not taken into account in the calculation of the meanvalue. These measuring points are particularly influenced by the liftoff and contact pressure of the KAL.

How?

Measurement method

Geometry — glue joint width
Measurement of the glue joint dimension (top and bottom of
workpiece) to determine the glue joint width over the entire
workpiece length using defined measuring points. Particularattention must be paid to the buckling at the front and rear edges.
Pragmatic — objective:• Measuring magnifier (5x to 10x magnification) with threadcounter

Figure 1: Measurement of the glue joint width

Decision criteria

•
•
•
•

𝐴𝐴 𝑢𝑢𝑢𝑢𝑢𝑢 𝐺𝐺 ≥ 0,5 ∗ 𝑥𝑥̅
𝑥𝑥̅ − 20% ≤ 𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀 𝐵𝐵 𝑏𝑏𝑏𝑏𝑏𝑏 𝐹𝐹 ≤ 𝑥𝑥̅ + 20%
Difference between top and bottom ± 20%
Measured values A to G should be as small as possible(depending on the raw materials) and B to F must notexceed 0.15 mm when using EVA or 0.1 mm when using
PU.

Carrier material to be used: chipboard EN 312 P2 38 mm(e.g. Egger P2).

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What?

12.2 Edgeband progression
Quality feature
Definition
Regulations
Measuring instrument

Geometry — edgeband progression
Measurement of the edgeband overhangs and the edgeband
progression at the top and bottom of the workpiece over the entire
length.
Pragmatic — objective:• Fitting aid
Theoretical — objective:• Caliper gage/depth gage

Measurement methodGage:
An additional gage can be prepared to evaluate deviations.

How?

Caliper gage/depth gage:
Measurement of the overhang of the edgeband at the top andbottom of the workpiece over the entire workpiece length andevaluation of the progression over the length for panels without ahold-down device.

Figure 2: Edgeband progression

Decision criteria

In general, the following specification applies to the use of thecorrect edgeband:
𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾𝐾ℎöℎ𝑒𝑒 [𝑚𝑚𝑚𝑚] = 𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃 + 4 𝑚𝑚𝑚𝑚

Gage:
There must be no visible deviations from the workpiece to thegage.
Caliper gage/dial gage/depth gage:
The tolerance for the edgeband progression is:± 0,5 𝑚𝑚𝑚𝑚

Gluing
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What?

12.3 Edge material overhangs
Quality feature
Definition

Geometry — edge material overhangs
Evaluation and measurement of the edge material overhangs
longitudinally to the front and rear edge of a workpiece.

Regulations
Measuring instrument

Theoretical — objective:• Caliper gage/depth gage
Caliper gage/depth gage:
Measurement of the overhangs of the glued edge material at thefront and rear edges.

How?

Measurement method

Figure 3: Edgeband overhangs

Decision criteria

Caliper gage/dial gage/depth gage:
The following tolerances apply to the respective procedure:Type ofglue
Glue joint
laserTec
airTecFront edge

Rear edge

5 mm ± 2.0 mm
10 mm ± 2.0 mm
20 mm ± 2.0 mm

5 mm ± 2.0 mm
20 mm ± 2.0 mm
30 mm ± 2.0 mm

Each at 20 m/min feed speedPost processing
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Post-processing — edge bandingI
1. Squareness of the sizing cut ................................................................................................ 2
2. Straightness of the sizing cut ............................................................................................... 3
3. Fibrousness .......................................................................................................................... 4
4. Hollow cut ............................................................................................................................. 5
5. Chatter marks........................................................................................................................ 6
6. Level uniformity .................................................................................................................... 8
7. Presence of tears and break-offs.......................................................................................... 9
8. Edge roughness.................................................................................................................. 10
Content ................................................................................................................................... 13
9. Joint closure ....................................................................................................................... 15
10. Mechanical damage .......................................................................................................... 16
10.1 Board material ............................................................................................................... 16
10.2 Edging strip ................................................................................................................... 17
11. Edge removal .................................................................................................................... 1711.1 Peel resistance.............................................................................................................. 18
11.2 Chip tear ....................................................................................................................... 19
12. Geometry........................................................................................................................... 20
12.1 Glue joint width.............................................................................................................. 20
12.2 Edgeband progression ................................................................................................... 21
12.3 Edge material overhangs ............................................................................................... 22
Inhalt ....................................................................................................................................... 23
13. Cutting............................................................................................................................... 24
13.1 Parallelism of the chamfer cut..................................................................................... 26
13.2 Angularity of the straight snipping cut ....................................................................... 26
13.3 Straightness of the snipping cut (edge material thickness ≤ 3 mm)........................... 27
13.4 Evenness of the snipping cut (edge thickness > 3 mm) ............................................. 29
13.5 Processing roughness ................................................................................................ 30
13.6 Presence of tears and break-offs ................................................................................ 30
13.7 Impressions and shiny marks during cutting ............................................................. 32
13.8 Undamaged protective film ......................................................................................... 33
14. Profile trimming ................................................................................................................ 34
14.1 Parallelism of profile trimming .................................................................................... 35
14.2 Waviness ..................................................................................................................... 36
l:\Delivery (A-L)\HOM\HOM_MGEAGX_053\bersetzungsauftrag Qualittskriterien\03_Prod\03b_DTP\03_Work\PDF\Quality criteria EN-US - Qualitätskriterien EN-US.docx

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14.3 Chatter marks .............................................................................................................. 36
14.4 Brinnelling from swinging up ...................................................................................... 37
14.5 Processing roughness ................................................................................................ 39
14.6 Vertical processing transition ..................................................................................... 40
14.7 Horizontal processing transition ................................................................................. 40
14.8 Flushness between the transverse and longitudinal edges........................................ 41
14.9 Impressions and shiny marks during profile trimming ............................................... 43
14.10 Tears (for wooden edges).......................................................................................... 44
14.11 Undamaged protective film ....................................................................................... 45
15. Profile and glue joint scraper............................................................................................ 46
15.1 Profile scraper ............................................................................................................. 46
15.1.1 Uniformity of profile outfeed ..................................................................................... 46
15.1.2 Surface quality ........................................................................................................ 47
15.1.3 Stress whitening ..................................................................................................... 48
15.1.4 Scraper chip form ................................................................................................... 49
15.1.5 Impressions and shiny marks during profile scraping ................................................ 50
15.1.6 Uniform processing ................................................................................................. 51
15.1.7 Waviness................................................................................................................ 52
15.1.8 Chip tear at the rear edge........................................................................................ 53
15.1.9 Transition from the edge material to the covering layer ............................................. 54
15.2 Glue joint scraper ........................................................................................................ 55
15.2.1 No damage to the covering layer ............................................................................. 55
15.2.2 No glue residue in the area of the glue joint.............................................................. 56
15.2.3 Shiny marks with the glue joint scraper .................................................................... 57
15.2.4 Undamaged protective film ...................................................................................... 58
13. CuttingPost processing
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Cutting

Angularity of thestraight snippingcut

Parallelism of thechamfer cut

Straightness

Evenness

Processing
roughness

Presence of tears
and break-offs

Impressions andshiny marks

Undamaged
protective film

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What?

13.1 Parallelism of the chamfer cut
Quality feature
Definition

Regulations
Measuring
instrument

Measurement
methodParallelism of the chamfer cut
Evaluation of the parallelism of the chamfer for chamfer snipping.
The chamfer thickness must be set according to the edgeband thickness. The
two chamfer edges must be at a parallel and equal distance over the entire
edgeband height.
Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)
Theoretical — objective:• Digital microscope• USB magnifying glass
A test sample with a workpiece thickness of >= 38 mm must be used for theassessment of parallelism.
Visual check without tools:
The parallel progression of the chamfer cut is visually examined in goodlighting. Visual deviations are considered errors if they are visible to the naked
eye from a viewing distance of 50 cm within 30 seconds.

How?

Measuring magnifier:In addition to the visual check, a measuring magnifier can be used to look at
the parallel progression more closely as a supportive measure.

Decision criteria

Digital microscope:
For objective and reproducible results, a digital microscope can be used andthe parallelism measured and documented.
Visual check without tools:
There must be no visual deviations in the parallelism of the chamfer over the
workpiece height.
With tools:
The parallelism of the test sample with a workpiece thickness >= 38 mm must
not deviate by more than 0.05 mm.

13.2 Angularity of the straight snipping cut

Post processing

What?

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Quality feature
Definition

Angularity of the straight snipping cut
Evaluation of the squareness of the straight snipping cut for flush and straightsnipping.
This evaluation applies for all edge materials.

Regulations
Measuring
instrument

Pragmatic — subjective:• Light gap measurement with precision control square

Measurement
methodTheoretical — objective:• Digital microscope• Measuring machine (e.g. KMG)
Light gap measurement with precision control square:
To determine the deviations, a precision control square for light gap
measurement is placed on the base surface at an angle of 90° with an angle
leg to check the angle of the snipping cut with the second leg. The squarenessof the snipping cut can thus be assessed.
0.05

How?

┴

Figure 4: Angularity of the straight snipping cut

Decision criteria

Measuring machine (KMG):
Automatic check of the squareness in comparison with a CAD modelLight gap measurement with precision control square:
The angularity of the straight snipping cut must not visually deviate from theprecision control square.
Measuring machine (KMG):
The angularity measurement must not exceed the following tolerances:• Workpiece thickness <= 22 mm  tolerance = 0.05 mm• Workpiece thickness > 22 mm  tolerance = 0.10 mm

13.3 Straightness of the snipping cut (edge material thickness ≤ 3 mm)

Post processing
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What?

Quality feature
Definition

Regulations
Measuring
instrument

Measurement
method

8. September 2022

Straightness of the snipping cut (edge thickness ≤ 3 mm)
Assessment of the straightness of the snipping cut after the flush snipping andstraight snipping processes. No surface unevenness must be detectable on theedge of the snipping cut.
Straightness applies only to edge materials with a thickness≤ 3 mm.
Pragmatic — subjective:• Light gap measurement with straight edge
Theoretical — objective:• Measuring machine (KMG)
Only edge materials ≤ 3 mm may be used to assess the straightness.
Light gap measurement with straight edge:
To determine the deviations, the longitudinal side of a straight edge for light
gap measurement is placed on the base surface and the snipping cut ischecked. The straightness or flatness of the snipping cut can thus be assessed.

How?

0.05

Figure 5: Straightness of the snipping cut

Decision criteria

Measuring machine (KMG):
Automatic check of straightness in comparison with a CAD model.
Light gap measurement — straight edge:
The straightness of the snipping cut must not deviate visually over the
workpiece height; no significant light gap must be visible.
Measuring machine (KMG):
The straightness measurement of the snipping cut may deviate a maximum of
0.05 mm for an edgeband ≤ 3 mm.

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13.4 Evenness of the snipping cut (edge thickness > 3 mm)

What?

Quality feature
Definition

Regulations
Measuring
instrument

Measurement
methodEvenness of the snipping cut (edge thickness > 3 mm; solid edges)
Assessment of the evenness of the surface of the snipping cut after flush andstraight snipping. No surface unevenness must be detectable on the surface ofthe snipping cut.
The evenness applies exclusively to edges with a thickness of > 3 mm,
commonly referred to as solid edges.
Pragmatic — subjective:• Light gap measurement with straight edge/precision control square
Theoretical — objective:• Measuring machine (KMG)
The quality feature of evenness can be evaluated only for edges > 3 mm. If
possible, the evenness of the snipping cut is measured with a solid edge of 20
x 60 mm, otherwise with the thickest available edgeband.

How?

Light gap measurement — straight edge/precision control square:
When measuring the light gap with a straight edge, it can be seen in thebacklight whether the surface is even or uneven. The surface of the snipping
cut should be checked over the eight measuring distances as shown by thelines in the figure.

Figure 6: Evenness of the snipping cut

KMG measuring machine:
Automatic check of evenness in comparison with a CAD model.
Decision criteria

Light gap measurement — straight edge:
In the back light, the width of the light gap between the solid edge and theprecision control square must be evaluated visually at the individual measuringlines and as a whole. No significant light gap should be visible.
Measuring machine (KMG):
The tolerance of the evenness of a snipping cut is a maximum of 0.05 mm.

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13.5 Processing roughness

What?

Quality feature
Definition

Processing roughness of the snipping cut
When processing with defined blades, the roughness of the surface of thesnipping cut is determined by the roughness of the blades (chatter marks, tooth
marks, fibers, scratches, etc.) and reflected as cutting tracks on the snipping
cut.
Here, processing tracks or cutting tracks can appear on ABS and wood edges,
whereas PP edges tend to smear.

Regulations
Measuring
instrument• VDI guideline 3414 sheet 1
Pragmatic — subjective:• Haptic testing (finger test)• Measuring magnifier (5x to 10x magnification)• Light gap measurement with straight edge
Theoretical — objective:• Contour-measuring device• Roughness-measuring device• Digital microscope (+ dark field illumination)

Measurement
methodHaptic testing (finger test):
In haptic testing, the person performing the test moves their fingertips over thesurface of the snipping cut to strengthen the perception of unevenness.

How?

Measuring magnifier (5x to 10x magnification):
The snipping cuts of the workpieces are evaluated at an angle of 90° with goodlighting and a 5x to 10x magnification.
Light gap measurement — straight edge:
To determine the deviations, the straight edge for light gap measurement isplaced on the snipping cut. The processing roughness on the snipping cut canthus be assessed in the backlight.
Decision criteria

The limit value for the processing roughness of the snipping cut is Rz = 25.
Haptic testing (finger test)
No significant roughness should be perceptible haptically on the snipping cut.
Measuring magnifier
No significant roughness must be perceptible with the measuring magnifier on
the snipping cut.
Light gap measurement — straight edge
No significant roughness should be perceptible in the backlight with the straightedge.

13.6 Presence of tears and break-offs

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What?

Quality feature
Definition

8. September 2022

Presence of tears and break-offs
Visible and perceptible protruding fibers, tears and cracks in the edgeband overthe snipping cut, which, depending on the material, can occur due to the cutting
shape, tool wear and the direction of the fiber cut.
A distinction is made between two states of tears and breaks:• In the case of plastic edgeband materials (PP & ABS), by edgeband
breaking off upward, downward and especially at the corners.
• In the case of wood and melamine edgebands, tears occur at the edge
areas of the snipping cut.

Regulations
Measuring
instrument
Measurement
methodPragmatic — subjective:• Visual check without tools• Haptic testing (finger test)
Visual check without tools:
The snipping cuts of the workpieces are visually examined in good lighting withspecial attention paid to the edge and corner areas. Visual deviations are
considered errors if they are visible to the naked eye from a viewing distanceof 50 cm within 30 seconds.

How?

Haptic testing (finger test):
In addition to the visual check, the person performing the test moves theirfingertips over the surface against the direction of cutting, so that fibers or partsof fibers stand up due to their jagged structure. These fibers get caught in the
furrows and grooves of the fingertips, thus increasing the perception ("cat haireffect").
Decision criteria

Visual check without tools/haptic testing:
There must be no visible or haptically perceptible tears over the entire heightof the snipping cut.
In addition, there must be no tears or break-offs beyond the snipping cut into
the covering layer.

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13.7 Impressions and shiny marks during cutting
Quality feature
Definition

Impressions and shiny marks during cutting
Design deviations in the form of pressure points and shiny marks on the
edgeband and in the form of friction when the workpieces are traced by thesnipping stops (tracing elements).

What?

Difference between impressions and shiny marks:• Impressions are created in particular with upright snipping stops by thesnipping stop at the front and/or rear edge.
• Shiny marks are created by moving snipping stops or the chamfersnipping stop. Note that this effect is intensified in the case of dark,glossy colors.
Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)• Haptic testing (finger test)

Measurement
methodVisual check without tools:
Workpieces with an edgeband are visually checked in the backlight/scattered
light (natural/direct sunlight). Shine is characterized by the intense reflection oflight on smooth surfaces. In comparison with the majority of the surface, shinymarks and impressions are recognizable by a change of directional reflection(when exposed to light).
Visual deviations are considered errors if they are visible to the naked eye froma viewing distance of 50 cm within 30 seconds.

How?

Regulations
Measuring
instrument

Measuring magnifier (5x to 10x magnification):
A measuring magnifier can be used to examine and evaluate shiny marks ordetect impressions more closely.

Decision criteria

Haptic testing (finger test):
Haptically, impressions can be felt in particular on the workpiece in the area ofthe snipping stops.
In the areas where the snipping stops touch or slide on the edgeband, no visible
and/or haptically perceptible impressions or shiny marks should be detectedusing the specified measuring devices.

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What?

13.8 Undamaged protective film
Quality feature
Definition

Regulations
Measuring
instrument

Undamaged protective film
If protective film is present on the edgeband, it must not be ripped or torn by
the snipping process and hang down. It is important that the protective film is
not damaged. This can occur especially in the case of snipping units withmoving snipping stops.
Pragmatic — subjective:• Visual check without tools
Visual check without tools:
The workpiece is visually inspected at the snipping cut areas in good lighting
without any tools.
Visual deviations are considered errors if they are visible to the naked eye froma viewing distance of 50 cm within 30 seconds.

Decision criteria

Visual check without tools:
During this visual check, a distinction is made between two states for visualevaluation:

How?

Measurement
method••OK = undamaged protective film and adhesion
NOK = damaged protective film or no adhesion

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14. Profile trimming

Profile trimming

Parallelism

Waviness

Chatter marks

Brinnelling fromswinging up

Processing
roughness

Vertical processing
transition

Horizontal
processing
transition

Flushnesscrosswise tolongitudinal

Impressions andshiny marks

Tears

Undamaged
protective film

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14.1 Parallelism of profile trimming
Parallelism of profile trimming
Evaluation of the vertical profile variant (e.g. radius, chamfer) of profile trimmingfor parallelism over the entire workpiece height.
The parallelism of the vertical profile variant describes the parallel progressionof the profile at the same profile width over the workpiece height of the two
cutting edges to each other.

Regulations
Measuring
instrument

Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)

What?

Quality feature
Definition

Theoretical — objective:• Digital microscopeHow?

Measurement
methodWorkpieces with a height of ≥ 38 mm must be used to evaluate parallelism.
Visual check without tools/measuring magnifier:
The vertical profile gradients of the workpieces are examined for parallelism ingood lighting. Visual deviations are considered errors if they are visible to thenaked eye from a viewing distance of 50 cm within 30 seconds.
Digital microscope:
In addition, a digital microscope can be used for objective and reproducible
results.

Decision criteria

Visual check without tools/measuring magnifier:
There must be no visible deviations in parallelism over the entire workpieceheight after profile trimming.
Digital microscope:
The profile variant of the edgeband may deviate up to a maximum of 0.05 mm
in its parallelism over the entire workpiece height.

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14.2 Waviness

What?

Quality feature
Definition

Waviness
Waviness caused by cutting refers to uneven parts with wavelengths or surface
irregularities.
This waviness is caused by the flat area of the tool blades, which can cause aprofile (e.g. radius, chamfer) to become too wide and the two edge areas (e.g.
the radii) to become wavy.
For a precise radius, it is important to use the correct tool for the desired radius.

Regulations
Measuring
instrument

Measurement
methodPragmatic — subjective:• Visual check without tools• Light gap measurement — straight edge/precision control square• Measuring magnifier (5x to 10x magnification)
Theoretical — objective:• Digital microscope• KMG measuring machine• Contour-measuring device
Visual check without tools:
The straight progressions of the profiles is examined in good lighting. Visualdeviations are considered errors if they are visible to the naked eye from aviewing distance of 50 cm within 30 seconds.

How?

Light gap measurement — straight edge/precision control square:
To make waviness more easily detectable, a straight edge or a precisioncontrol square can be used.
Measuring magnifier (5x to 10x magnification):
The vertical and horizontal profiles of the workpieces are evaluated at an angleof 90° with good lighting using a measuring magnifier (5x to 10x magnification).
Digital microscope:
In addition, a digital microscope can be used for objective and reproducible
results.
Decision criteria

Visual/measuring magnifier/measuring magnifier/digital microscope:
There must be no visible waviness.
Light gap measurement — straight edge/precision control square:
The width of the light gap between the edgeband and the straight edge mustbe evaluated visually. In the case of a straight profile without waves, neither a
gap nor waviness must be detectable (e.g. with the straight edge).

14.3 Chatter marks

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Chatter marks on the vertical part of the workpiece
The trimmed vertical part of the profile trimming is characterized by processing
tracks that can appear as chatter marks. In the case of tools with multiple
blades, the cutting kinematics only represent one blade on the trimmed surface
due to the tolerances of individual blades. The distance between individual
chatter marks is created by the tool feed.
Due to a missing scraper, these cannot be equalized, and chatter marks thus
remain in the vertical part and especially in the corners (ball above and below).

Regulations
Measuring
instrument

Pragmatic — subjective:• Visual and haptic testing (finger test)• Contact testing (+ manual measuring)• Measuring magnifier (5x to 10x magnification)

What?

Quality feature
Definition

How?

Measurement
methodTheoretical — objective:• Digital microscope (dark field illumination/image processing)• Profile method• Measuring machine (KMG)• Contour-measuring device• Optical (camera system/laser)
Visual and haptic testing (finger test):
The vertical part of the entire formatted narrow area is evaluated visually andhaptically. Visual deviations are considered errors if they are visible to thenaked eye from a viewing distance of 50 cm within
30 seconds. In haptic testing, the person performing the test moves theirfingertips over the surface of the narrow surface to strengthen the perceptionof chatter marks.
Contact testing (+ manual measuring):
Graphite rods can be used here, for example. The color particles are depositedin the chatter marks when the rods are pressed against the cutting edge
surface. (If the chatter mark widths are even, multiple marks should be counted
to reduce uncertainty when determining the start and end points by averaging.)
Microscope:
In the same way as the visual check, a digital microscope (e.g. dark field
illumination) can be used to examine the vertical part of a workpiece for chattermarks. In addition, the chatter mark length can be measured and documented.

Decision criteria

The chatter marks must be only very faintly pronounced on the entire verticalheight of the profiles (e.g. radius, chamfer). In the corners, care must be taken
to ensure that the respective profiles progress evenly so that there are no
choppers on the profile. With radii, it is particularly important that the corners
can be perceived subjectively as a rounding.

14.4 Brinnelling from swinging up

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What?

Quality feature
Definition

Regulations
Measuring
instrument

8. September 2022

Brinnelling from swinging up
Marks on the profiles (e.g. radii, chamfers) crosswise to the feed direction due
to the profile trimmer swinging up and vibrating (e.g. due to insufficientsystem rigidity).
This form of brinnelling occurs only in the horizontal direction due to highfriction in wood edgebands.
Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)• Contact testing (+ manual measuring)

How?

Theoretical — objective:• Digital microscope• KMG measuring machine• Contour-measuring device
Measurement
methodDecision criteria

See 14.3 Chatter marks
There must be no recognizable brinnelling caused by swinging up.

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14.5 Processing roughness

What?

Quality feature
Definition

Processing roughness (lubricating effect PP)
When processing with defined blades, the roughness of the surface of the
profile trimming is determined by the roughness of the blades (chatter marks,
tooth marks, fibers, scratches, etc.) and reflected as cutting tracks on the
profile.
Here, processing tracks or cutting tracks can appear on ABS and woodedges, whereas PP edges tend to smear due to their material properties. Thiscan be counteracted with the correct cutting speed/speed/direction of rotationof the tool (clockwise/counterclockwise).

Regulations
Measuring
instrument

Pragmatic — subjective:• Haptic testing (finger test)• Measuring magnifier (5x to 10x magnification)• Light gap measurement with straight edge

How?

Theoretical — objective:• Contour-measuring device• Roughness-measuring device• Digital microscope (+ dark field illumination)
Measurement
methodDecision criteria

See 14.2 WavinessWith the specified measuring devices, it must not be possible to detect any
visually perceptible processing roughness in the form of cutting tracks and/or
smear effects in the profile areas as a whole.

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14.6 Vertical processing transition
Vertical processing transition
Evaluation of the transition from upper to lower processing in the vertical part.
This applies to units in which the vertical part is trimmed using two devices orin separate processing steps (e.g. FK11, FF32 and FK21).
Different applications or different settings of the upper and lower units canresult in different profile variants (e.g. radius, chamfer) as well as recognizable
transitions (e.g. upper radius larger than lower radius).

What?

Quality feature
Definition

Figure 7: Vertical processing transition

Regulations
Measuring
instrument

How?

Measurement
methodPragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)• Light gap measurement with straight edge/precision control square
Theoretical — objective:• Digital microscope• Measuring machine (KMG)• Contour-measuring device
To evaluate the processing transition of the profile over the height of the verticalnarrow surface, the thickness of the panel must be min. 38 mm, otherwise
potential errors will not be visible.
Visual check without tools:
The uniformity of the profile transitions is checked at the vertically trimmedlines/radii in good lighting. Visual deviations are considered errors if they are
visible to the naked eye from a viewing distance of 50 cm within 30 seconds.
Measuring magnifier (5x to 10x magnification)/straight edge/precision control
square:A measuring magnifier or a straight edge can be used to identify or examine
detected processing transitions in more detail.

Decision criteria

The progression of the trimmed profiles must be evaluated in the transition of
the vertical part. There must be no recognizable transitions in the vertical part.
In addition, there must be no overhangs that can be seen and/or felt. A
homogeneous progression is a prerequisite for this.

14.7 Horizontal processing transition

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Quality feature
Definition

8. September 2022

Horizontal processing transition
Evaluation of the transition from the trimming of the upper and bottom edgesof the workpiece (fine trimming or multi-trimming) to the profile trimming of thefront and rear workpiece contour. This applies to units that only process thefront and rear workpiece contours (e.g. FK30).

What?

Unwanted transitions can occur in the case of profile trimming of the front andrear workpiece contour (e.g. due to incorrect line points, incorrect pressures,
incorrect mechanical settings). The profile trimming contour must correspondto the contour of the longitudinal edge. In addition, damage to the covering
layer (especially in the area of the corners) must be avoided.

Figure 8: Horizontal processing transition

How?

Regulations
Measuring
instrument

Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)• Light gap measurement with straight edge/precision control square
Theoretical — objective:• Digital microscope• Measuring machine (KMG)• Contour-measuring device

Measurement
methodDecision criteria

Same as Chapter 14.6 Vertical processing transition.
The progression of the trimmed profile (e.g. radius, chamfer) must be
evaluated in the transition of the horizontal part. Transitions or overhangs in
the horizontal part must not be noticeable or perceptible with the definedmeasuring instruments. A homogeneous progression must be achieved.
In addition, damage to the covering layer, especially in the corners, is not
permitted.

14.8 Flushness between the transverse and longitudinal edges

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What?

Quality feature
Definition

Regulations
Measuring
instrument

8. September 2022

Flushness between the transverse and longitudinal edges
In the case of workpieces with glued longitudinal and transverse edges, atransition occurs between the two edgebands after profile trimming. This islocated in the area of the profile outfeed to the transverse edge.
For an accurate profile outfeed, it is important to use the exact tool for thedesired profile.
Pragmatic — subjective:• Visual and haptic testing (finger test)• Light gap measurement with straight edge/precision control square
Theoretical — objective:• Digital microscope• Contour-measuring device• Measuring machine (KMG)

How?

Measurement
methodVisual and haptic testing (finger test):
The workpieces are evaluated in the area of the transition from thelongitudinal edge to the transverse edge in good lighting. Visual deviations
are considered errors if they are visible to the naked eye from a viewing
distance of 50 cm within 30 seconds. In addition, haptic testing must be
performed.

Figure 9: Flushness between the transverse and longitudinal edge

Light gap measurement with straight edge/precision control square:
A straight edge can be used to identify or examine detected processing
transitions in more detail.
Decision criteria

An existing overhang can be compensated by shrinkage after around sevendays of storage.
Visual and haptic testing (finger test):
There must be no clearly visible or haptically perceptible overhang at thetransition from the longitudinal to the transverse edge.
Light gap measurement with straight edge/precision control square:
At the transition from the longitudinal to the transverse edge, no significant
overhang must be visible in the form of a light gap.
Digital microscope/contour measuring device/measuring machine (KMG):
Overhang tolerance ± 0.05 mm.

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14.9 Impressions and shiny marks during profile trimming
Quality feature
Definition

Impressions and shiny marks during profile trimming
Design deviations in the form of pressure points and shiny marks on the
edgeband when tracing the workpieces due to detector rollers and sliding
shoes of the profile trimming units (tracing elements).

What?

Difference between impressions and shiny marks:• Impressions are created especially in rolling tracing (detector rollers)due to the starting pressure/impact and the more selective load ofdetector rollers. This is especially common with soft edgeband
material (e.g. paper).
• Shiny marks are created by a sliding stop pad on the front side andthrough the lateral tracing on the narrow surface. Note that this effectcan be intensified in the case of dark and glossy colors.
Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)• Haptic testing (finger test)

Measurement
methodVisual check without tools:
The edgebands of the workpieces are visually checked in the backlight/strip
light (natural/direct sunlight). Shine is characterized by the intense reflection oflight on smooth surfaces. Shiny marks and impressions are visible due to thedirectional reflection (light incidence). Visual deviations are considered errors
if they are visible to the naked eye from a viewing distance of 50 cm within
30 seconds.

How?

Regulations
Measuring
instrument

Measuring magnifier:
A measuring magnifier can be used to examine and evaluate shiny marks ordetect impressions more closely.
Haptic testing (finger test):
Haptically, impressions can be felt in particular on the workpiece in the area ofthe snipping stops.
Decision criteria

In the areas where the tracing rolls or slides on the edgeband, no visible orperceptible impressions or shiny marks should be detected using thespecified measuring devices.

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14.10 Tears (for wooden edges)
Tears (for wooden edges)
Visible and perceptible pronounced chips, fibers, tears and cracks in the
edgeband material in the profile area, which, depending on the material, canoccur due to the cutting shape, tool wear and the direction of the fiber cut.
During profile trimming, tears occur exclusively with edge material made ofwood (especially woods with long fibers). This can be counteracted by achange in synchronous trimming.

Regulations
Measuring
instrument

Pragmatic — subjective:• Visual check without tools• Haptic testing (finger test)
Visual check without tools:
The trimmed profiles of the workpieces are examined in good lighting. Visualdeviations are considered errors if they are visible to the naked eye from aviewing distance of 50 cm within 30 seconds.

What?

Quality feature
Definition

How?

Measurement
methodHaptic testing (finger test):
In addition to the visual check, the person performing the test moves theirfingertips over the surface against the fiber, so that fibers or parts of fibers
stand up due to their jagged structure. These fibers get caught in the furrows
and grooves of the fingertips, thus increasing the perception ("cat hair effect").
Decision criteria

Visual check without tools/haptic testing:
There must be no visible or haptically perceptible tears over the entire
trimmed profile.

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14.11 Undamaged protective film
Undamaged protective film
If protective film is present on the edgeband, it must not be ripped or torn by
the profile trimming and hang down. It is important that the protective film is
not damaged.
This can occur when inserting the unit on the workpiece surface, especially inthe case of films with low adhesion.

Regulations
Measuring
instrument

Pragmatic — subjective:• Visual check without tools

Measurement
methodVisual check without tools:
The workpiece is visually inspected at the profile trimming areas in goodlighting without any tools. Visual deviations are considered errors if they are
visible to the naked eye from a viewing distance of 50 cm within 30 seconds.

Decision criteria

Visual check without tools:
A distinction is made between two states for the visual check (visualevaluation):

How?

What?

Quality feature
Definition••

OK = undamaged protective film and adhesion
NOK = damaged protective film and/or no adhesion

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15. Profile and glue joint scraper15.1 Profile scraper
15.1.1 Uniformity of profile outfeed
Quality feature
Definition

Uniformity of the profile outfeed
A uniform profile outfeed toward the center of the narrow surface takes
into account an identical design of the upper and lower profiles.
The respective specifications according to the workpiece drawing andthe tool profile suitable for the edge material are used as a basis.

What?

Carrier material

Edge material

Uniform radius
outfeedFigure 10: Example — uniform radius outfeed

Regulations
Measuring instrument

Pragmatic — subjective:• Measuring magnifier (5x to 10x magnification)• Caliper gage/depth gage
Theoretical — objective:• Digital microscope

Measurement method

Measuring magnifier (5x to 10x magnification)
See chapter 14.2

How?

Caliper gage/depth gage:
A depth gage can be used to measure the depth of the respective profile
at a minimum of four measuring points over the entire workpiece lengthand compare it with the opposite profile.
Digital microscope:
See chapter 14.2
Decision criteriaWith the specified measuring instruments, a homogeneous profile
progression in the direction of the narrow surface must be ensured. In
addition, the upper and lower profiles must not deviate from each other(max. 10% deviation).
Examples: 1 mm radius  max. deviation 0.1 mm (= 10%) or
3 mm chamfer  max. deviation 0.3 mm (= 10%)

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Quality feature
Definition

Surface quality
There should be no processing tracks in the form of trimming tool chattermarks on the upper and lower horizontal parts of the profiles after the
profile scraper processing.

Regulations
Measuring instrument

Pragmatic — subjective:• Visual check without tools• Haptic testing

Measurement method

Visual check without tools:
The profiles of the workpieces are visually examined for surface quality
in good lighting by means of mirrors in the backlight. Visual deviations
are considered errors if they are visible to the naked eye from a viewing
distance of 50 cm within 30 seconds.

How?

What?

15.1.2 Surface quality

Haptic testing:
In haptic testing, the person performing the test moves their fingertips
over the surface of the horizontal profile to strengthen the perception ofchatter marks.
Decision criteria

In the horizontal part, no chatter marks and/or processing tracks must
be visible and/or haptically perceptible over the entire length after the
profile scraper processing.
A noticeably smooth surface over the entire length must be achieved.

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15.1.3 Stress whitening
Stress whitening
Plastic edges tend to produce "stress whitening" and matt surfaces
during scraper processing. In addition, the color fastness suffers,
especially with dark edgebands.
During scraper processing, stress whitening can form on the cutting
surfaces of the edgebands and appears as an undesirable white or grayshimmer.
In order to counteract stress whitening, the recommended chip thickness(chapter 15.1.4) must be set.

Regulations
Measuring instrument

Pragmatic — subjective:• Visual check without tools

Measurement method

Visual check without tools:
The profiles of the workpieces are visually examined for their tendency
to stress whitening in good lighting by means of mirrors in the backlight.
Visual deviations are considered errors if they are visible to the naked
eye from a viewing distance of 50 cm within 30 seconds.

Decision criteria

Visual check without tools:
The color difference between the surfaces of the drawn profiles and thenarrow surface must be as small as possible. Stress whitening must not
be visually noticeable.

How?

What?

Quality feature
Definition

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What?

15.1.4 Scraper chip form
Quality feature
Definition

Scraper chip form
The form of the scraper chip over the entire drawn line of the profile mustbe evaluated in order to prevent brightening or stress whitening, tosmooth out the chatter marks of the trimming and to achieve an optimum
result.

Regulations
Measuring instrument

Pragmatic — subjective:• Haptic testing
Pragmatic — objective:• Caliper gauge• Micrometers

Measurement method

Haptic testing:
The uniform thickness and width progression of the drawn chip is
checked haptically over the entire length of the workpiece.

How?

Caliper gage/micrometer:
Measurement of the chip thickness and chip width over the entire length;
this applies to the upper and lower chip.
Decision criteria

Haptic testing:
Depending on the edgeband material, a smooth chip (as far as possible)of the same thickness and width over the entire length must be achieved.
In addition, the chip should curl or roll up as little as possible.
Caliper gage/micrometer:
The following measurement tolerances apply for the chip thickness:
Target chip thickness = 0.1 mm up to 0.15 mm(Exception: PMMA target chip thickness = 0.06 mm to 0.08 mm)

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15.1.5 Impressions and shiny marks during profile scraping

What?

Quality feature
Definition

Impressions and shiny marks during profile scraping
Design deviations in the form of pressure points and shiny marks on the
edgeband when tracing the workpieces due to detector rollers andsliding shoes of the profile scraper unit (tracing elements).
These depend on the material properties as well as on the tracingpressure, starting impact, lift-off, lubricant application, planer layout andcrowning of the edgeband material.
Difference between impressions and shiny marks:• Impressions are created especially in rolling tracing (detector
rollers) due to the starting pressure/impact and the more selective
load of detector rollers. This is especially common with softedgeband material (e.g. paper).
• Shiny marks are created during sliding tracing (sliding shoe), forexample, during tracing of the front side. Note that this effect is
intensified in the case of dark and glossy colors.
Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)

Measurement method

Visual check without tools (well-lit room):
The edgebands of the workpieces are visually checked in thebacklight/scattered light (natural/direct sunlight). Shine is characterized
by the intense reflection of light on smooth surfaces. Shiny marks andimpressions are visible due to the directional reflection (light incidence).
Visual deviations are considered errors if they are visible to the naked
eye from a viewing distance of 50 cm within 30 seconds.

How?

Regulations
Measuring instrument

Measuring magnifier (5x to 10x magnification)
A measuring magnifier can be used to examine and evaluate shinymarks or detect impressions more closely.
Decision criteria

In the areas where the tracing rolls or slides on the edgeband, there must
be no visible and/or perceptible impressions or shiny marks that can bedetected with the specified measuring devices.

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15.1.6 Uniform processing
Uniform processing
In the case of uniform processing, it must be ensured that there are nodents or steps over the entire workpiece length, and that there is ahomogeneous image.
In the case of double/triple roller tracing in particular, this must be
ensured at the front and rear edges.
This can be influenced in particular by the tracing pressure and lift-off.

Regulations
Measuring instrument

Pragmatic — subjective:• Visual check without tools

Measurement method

Visual check without tools (well-lit room):
The edgebands of the workpieces are visually checked in thebacklight/scattered light (natural/direct sunlight). Shine is characterized
by the intense reflection of light on smooth surfaces. Steps and dents
are visible due to the directional reflection (light incidence).
Visual deviations are considered errors if they are visible to the naked
eye from a viewing distance of 50 cm within 30 seconds.

Decision criteria

Visual check without tools:
The profile (e.g. radius, chamfer) and especially the front and rear edges
must have no visually perceptible steps and/or dents over the entire
workpiece length.

How?

What?

Quality feature
Definition

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15.1.7 Waviness
Waviness
Waviness caused by vibrations due to lack of rigidity and a profile
variant that is too deep (e.g. radius, chamfer) in the direction of thenarrow surface. These can occur especially as starting vibrations in thearea of the front edge as a result of lift-off. This waviness can also be
influenced by tracing pressure, lift-off and chip thickness (large radius
and thick chip  waviness increases).
In order to counteract waviness, the recommended chip thickness(chapter 15.1.4) must be set.

Regulations
Measuring instrument

Pragmatic — subjective:• Visual check

What?

Quality feature
Definition

Pragmatic — objective:• Dial gauge• Caliper gauge

How?

Measurement method

Visual check:
The progression of the vertical and horizontal profiles of the workpieces
is examined in good lighting. Visual deviations are considered errors ifthey are visible to the naked eye from a viewing distance of 50 cm
within 30 seconds.
Dial gage:
A dial gage is attached to the unit (default value 0.5–0.7 mm) in orderto determine the lift-off of the profile scraper unit.
Caliper gage:
The caliper gage is used to measure the chip thickness and chip width
according to Chapter 15.1.4.

Decision criteria

Visual check:
There must be no visible waves over the entire horizontal length of the
profiles.

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15.1.8 Chip tear at the rear edge
Chip tear at the rear edge
An exact chip tear of the drawn chip at the rear edge must be ensured
especially for longitudinal processing.
The requirements for an optimal chip tear are the standards of the quality
feature of the scraper chip form as defined in chapter 15.1.4.

Regulations
Measuring instrument

Pragmatic — subjective:• Visual check without tools

Measurement method

Visual check without tools:
The workpieces are examined in good lighting, paying special attention
to the rear edge. Visual deviations are considered errors if they are
visible to the naked eye from a viewing distance of 50 cm within
30 seconds.

Decision criteria

Visual check without tools:
The chip at the rear edge should be torn off flush. In addition, there must
be no visible tear-off points or break-off points in the form of paint defects
or stress whitening.

How?

What?

Quality feature
Definition

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15.1.9 Transition from the edge material to the covering layer
Quality feature
Definition

Transition from the edge material to the covering layer
A homogeneous transition from the edge material to the covering layerof the carrier material, especially in the area of the glue joint, must be
achieved. This applies to both the upper and lower transitions.

What?

Carrier material

Transition areafrom edges tocovering layer
Figure 11: Transition from the edge material to the covering layer

Pragmatic — subjective:• Haptic testing• Measuring magnifier (5x to 10x magnification)

Measurement method

Haptic testing:
In haptic testing, the person performing the test moves their fingertips
over the surface of the transition from the edge material to the covering
layer to strengthen the perception of unevenness.

How?

Regulations
Measuring instrument

Measuring magnifier (5x to 10x magnification):
The transitions from the edge material to the covering layers of theworkpiece are evaluated at an angle of 90° with good lighting and a 5x
to 10x magnification.
Decision criteria

The transitions from the edge material to the covering layers of thecarrier material must be flush. There must be no step or overhang thatis visible and/or haptically perceptible with the measuring devices.
In addition, the covering layer must not be damaged in this transition.

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15.2 Glue joint scraper
15.2.1 No damage to the covering layer
No damage to the covering layer
Visible damage to the covering layer due to the glue joint scraper
drawing too deep. This damage can occur in the form of break-outs,
damage or scratches or a change in the surface structure.
Attention must be paid in particular to the areas of the front and rearedges, which must be identical.

Regulations
Measuring instrument

Pragmatic — subjective:• Visual check without tools• Haptic testing (finger test)

Measurement method

Visual check without tools:
The transitions between the carrier material surfaces and the edge
material are visually examined in good lighting with special attention paid
to the front and rear edges. Visual deviations are considered errors ifthey are visible to the naked eye from a viewing distance of 50 cm within
30 seconds.

How?

What?

Quality feature
Definition

Haptic testing (finger test):
In addition to the visual check, the person performing the test moves
their fingertips over the drawn surface to feel any damage to the covering
layer haptically.
Decision criteria

There must be no visible and/or haptically perceptible damage to thecovering layer over the entire drawn surface.

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Quality feature
Definition

No glue residue in the area of the glue joint
Visible glue residue in the area of the joint, which has not been removedby the glue joint scraper. In addition, attention must be paid to any
minimum residual overhangs of the edge material.

Regulations
Measuring instrument

Pragmatic — subjective:• Visual check• Haptic testing• Measuring magnifier

Measurement method

Visual check without tools:
The transitions between the carrier material surfaces and the edge
material are visually examined in good lighting with special attention paid
to the front and rear edges. Visual deviations are considered errors if they
are visible to the naked eye from a viewing distance of 50 cm within
30 seconds.
Haptic testing (finger test):
In addition to the visual check, the person performing the test moves theirfingertips over the drawn surface to feel any damage to the covering layer
haptically.

How?

What?

15.2.2 No glue residue in the area of the glue joint

Measuring magnifier (5x to 10x magnification):
A measuring magnifier can be used to examine and evaluate detectedglue residues more closely.
Decision criteria

There must be no visible or haptically perceptible glue residue or
minimal edgeband overhangs over the entire drawn surface/glue joint.

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15.2.3 Shiny marks with the glue joint scraper
Shiny marks with the glue joint scraper
Surface damage in the form of shiny marks on the covering layer when
tracing the workpieces due to the tracing pads of the glue joint scraper
unit (tracing elements).
These depend on the material properties as well as on the tracingpressure, starting impact, lift-off, lubricant application, planer layout andwarping of the surface.
Shiny marks are created during sliding tracing (sliding shoe). Note that
this effect is intensified in the case of dark, glossy colors.

Regulations
Measuring instrument

Pragmatic — subjective:• Visual check without tools• Measuring magnifier (5x to 10x magnification)

Measurement method

Visual check without tools (well-lit room):
The covering layers of the workpieces are visually checked in thebacklight/scattered light (natural/direct sunlight). Shine is characterized
by the intense reflection of light on smooth surfaces. Shiny marks andimpressions are visible due to the directional reflection (light incidence).
Visual deviations are considered errors if they are visible to the naked eye
from a viewing distance of 50 cm within 30 seconds.

How?

What?

Quality feature
Definition

Measuring magnifier (5x to 10x magnification):
A measuring magnifier can be used to examine and evaluate shiny marks
or detect impressions more closely.
Decision criteria

In the areas where the tracing rolls or slides on the edgeband, there must
be no visible and/or perceptible impressions or shiny marks that can bedetected with the specified measuring devices.

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15.2.4 Undamaged protective film

What?

Quality feature
Definition

How?

Regulations
Measuring
instrument

Undamaged protective film
If protective film is present on the covering layer, it must not be ripped or tornby the glue joint scraper and hang down. It is important that the protective film
is not detached.
This can occur especially when inserting the unit on the workpiece surface
and/or in the case of films with low adhesion.
Pragmatic — subjective:• Visual check without tools

Measurement
methodVisual check without tools:
The workpiece is visually inspected at the profile trimming areas in goodlighting without any tools. Visual deviations are considered errors if they are
visible to the naked eye from a viewing distance of 50 cm within 30 seconds

Decision criteria

Visual check without tools:
A distinction is made between two states for the visual evaluation:••

OK = undamaged protective film and adhesion
NOK = damaged protective film and/or no adhesion