Product Information

LIF 171
LIF 181
Incremental
Linear Encoders

07/2018

LIF 171
LIF 181

Incremental linear encoders• For measuring steps down to 100 nm• Easy mounting with PRECIMET® adhesive film, or fastening with fixing clamps• Distance-coded reference marks• For large measuring lengths of up to 3 m• Measuring lengths of up to 6 m upon request
ISO 4762 M3x6
Md= 1Nm

15

200
10±25



17.5

30

Ø3.7

0.1 F
0.01/250

0.1mrad * RI*1mrad * IKS*35



0.1 F



231017.62028.4±0.136.4

28.5±0.116.5±0.1

84.2

4.5

<250

n x 200 (n=1,2,3,...)

3.3
19.9
0.5±0.1

ML/2

Ø 19-0.02/-0.1

1511.5±0.2

Ra 3.2

Fixed-point bond for even number of fixing clamps

M3

Scale in clamped
condition

Fixed-point bond for odd number of fixing clamps5 Fixed-point bond

0.1 F
0.01/250

0.1mrad * RI*
1mrad * IKS*35



19.9



0.5±0.1

 (ML + 30)±1

ML/2

ISO 7092-3 (2x)

ML>1 510>R10.012



10.01680

10.00860010.00440

5

Ø19+0.1
M316.5±0.10.1

20



0.1



28.5±0.1

F>716*ⓇⒸⓈⓈⓂ
123 4.5= Machine guideway= Max. change during operation= Reference mark position LIF 101 R / 171 R / 181 R= Reference mark positions LIF 101 C / 171 C / 181 C= Beginning of measuring length ML= Permissible overtravel= Mounting surface for scanning head
= Positive direction of motion= Mounting clearance between scanning head and scale= Scale stop surface
ML = Measuring length

UNC 4/40Ⓚ = AdhesiveⓁ = Scale length33.3



40.11

0.06

7.932.5±1

ISO 4762 M3x16 (2x)Md = 1Nm

23
3.3

 With stop pin at centerØ19-0.02/-0.1

10±2

Ø 3.7

1017.5

4.5

417.6

20

28.5±0.1

11.5±0.1

16.5±0.1

Scale inbondedcondition

Ra 3.2

50 

Product Information LIF 171, LIF
 181    07/2018

ScaleLIF 101

Measuring standard
Coefficient of linear expansion

SUPRADUR phase grating on Zerodur glass-ceramic or glass; grating period: 8 µm
–6 –1Þtherm ≈ (0±0.1) x 10 K (Zerodur glass-ceramic)–6 –1Þtherm ≈ 8 x 10 K (glass)Accuracy grade±3 µm; ±1 µm (only in Zerodur and up to a measuring length of 1640 mm)

Baseline error

 ±0.175 µm/5 mm

Measuring length ML* in mm   70	 120	 170	 220	 270	 320	 370	 420	 470	 520	 570	 620	 670720	 770	 820	 870	 920	 970 1040 1140 1240 1340 1440 1540 16403)
1840 2040 2240 2440 2640 2840 3040
Reference marks*

LIF 101 R
LIF 101 C

One reference mark at midpoint of measuring length
Distance-coded

Mass

7.5 g + 0.25 g/mm of measuring length

Scanning head

LIF 18

LIF 17Interface» 1 VPPTTLIntegrated interpolation*
Signal period–
4 µm

5-fold
0.8 µmCutoff frequency

 1 MHz–Scanning frequency–

 200 kHz 100 kHz 50 kHz 100 kHz 50 kHz 25 kHz

Edge separation a– 0.220 µs

 0.465 µs

 0.950 µs

 0.220 µs

 0.465 µs

 0.950 µs

Traversing speed1)

 240 m/min  48 m/min

 24 m/min

 12 m/min

 24 m/min

 12 m/min

 6 m/minInterpolation error
Position noise RMS±12 nm
0.6 nm2)(1 MHz )Electrical connection*

Cable, 0.5 m/1 m/3 m, with 15-pin D-sub connector (male); interface electronics in connector

Cable lengthWith HEIDENHAIN cable: ≤ 30 m

Supply voltage

DC 5 V ±5 % DC 5 V ±5 %Current consumption

 150 mA

Vibration 55 Hz to 2000 Hz
Shock 6 ms

 200 m/s2 (IEC 60068-2-6)
 500 m/s2 (IEC 60068-2-27)

Operating temperature
Storage temperature

0 °C to 50 °C–20 °C to 70 °C

Protection EN 60529

IP00; scanning head: IP50

Mass–3 dB

Scanning head
CableConnector

10-fold
0.4 µm– 165 mA (without load)

25 g (without cable)
38 g/m75 g* Please select when ordering
Only for TTL: Maximum traversing speed for referencing: 9.6 m/min · (40 kHz)2)
–3 dB cutoff frequency of the subsequent electronics
3)
Measuring lengths of up to 6 m upon request
1)

07/2018    Product Information LIF 171, LIF 181

Electrical connection

LIF 171/181 pin layout
15-pin D-sub connector

Power supply« TTL

Other signals

4122

101

93

1114

713UPSensor
5V0V

Sensor
0V

Ua1

¢

Ua2

£

Ua0

¥Vacant Vacant PWT1)A+

A–B+B–

R+

R–

Not
vacantNotvacantBlue

White/GreenWhiteBrown

GreenGray

PinkRedBlack

VioletVacant Vacant Yellow» 1 VPP
2)

Incremental signals

Brown/
Green

Shield on housing; UP = Power supply
Sensor: The sensor line is connected in the connector with the corresponding power supply
Unused pins or wires must not be assigned!

1)
2)

8615

Conversion of TTL/11 µAPP for PWTColor assignment of the connecting cable

Connecting cables
PUR connecting cable 6 × (2 × 0,19 mm2); AV = 0,19 mm2
PUR connecting cable 4 × (2 × 0,16 mm2) + (4 × 0,5 mm2); AV = 0,5 mm2¬ 8 mm¬ 6 mm1)

15-pin D-sub (female) to free cable end

332433-xx

355209-xx

15-pin D-sub connector (female) and15-pin D-sub connector (male)

335074-xx

355186-xx1)

Max. total cable length: 9 m
AP: Cross section of power supply lines          
 

595192 · 01 · E · 02 · 07/2018 · PDF

This Product Information supersedes all previous editions, which thereby become invalid.
The basis for ordering from HEIDENHAIN is always the Product Information documentedition valid when the order is made.

Further information:
Comply with the requirements described in the following documents to ensure correct
operation:• Brochure: Interfaces of HEIDENHAIN Encoders
1078628-xx• Brochure: Exposed Linear Encoders
208960-xx