Design considerations

STATIC LOAD LIMIT (kg)(AC series)
Model

Roller Diameter Thickness

Roller Length(mm)200 250 300 400 500 600 700 800 900 1000

PM380 series

38

1.250

45 45

4035

30

PM427 series

42.7

1.5

75

65 65

55

45

3530

25

PM486 series

48.6

1.4

65

65 65

55

45

3530

25 20

20

PM500 series

50

1.4

65

65 65

55

45

3530

25 20

20PM570 series

57

1.5

120 100 100 100 80

80

60

60 50

50

PM605 series

60.5

3.2

190 160 160 160 130 130 100 100 80

80

PMT series

50*-PM763 BS

76.3

3.65

n.a.

100 100 80

80

Thrust Load (kg)n.a.

60n.a.

30

50

60 n.a. n.a.

n.a. 250 250 225 200 200n.a.

70(DC series)
Model

Roller Length(mm)RollerThickness
Diameter
200 250 300 400 500 600 700 800 900 1000

PM380
series38

1.250 45

45

40

35

30

PM427
series

42.7

1.5

75 65

65

55

45

35

PM486
series

48.6

1.4

n.a. n.a.

65 55 45 35 30 25 2020( n.a.) (15) (13) (10) (9) (7) (n.a.) (n.a.)

PM500
series50

1.4

n.a. n.a.

65 55 45 35 30 25 2020( n.a.) (15) (13) (10) (9) (7) (n.a.) (n.a.)PM570
series

571.5n.a. n.a. 100 100 80

60 60

5050PM605
series60.5

3.2

n.a. n.a. 160 160 130 130 100 1008080PM763GE

76.3

3.65

n.a. n.a.

80

Thrust Load (kg)n.a.
30 25n.a.
30

50
n.a. n.a. n.a. 290 290 290 290 290*Value in the parenthesis is for twogrooved tube.

70Impact Loading:In applications where the article being transferred is dropped onto the Power Moller, reduce the static load limits inthe above table by 50% to compensate for the increased forces generated from impact. As the load limit will varyconsiderably in accordance with the intensity of impact, allow a substantial margin of safety.
Roller Level:
The level of the Power Moller and idler rollers in the conveyor must be adjusted so that the load weight will beevenly distributed. If the conveyed loads are not in contact with the Power Moller(s), because of their light weightor their physical nature, raise slightly the level of the Power Mollers (maximum 0.5mm). Care must also be paid not
to exceed the maximum static load of each rollers.
Poor contact between the conveyed load and the Power Mollers can cause slippage or jam due to the load twisting.
Rubber lagging is recommended to ensure the contact and to ensure the proper transfer of the load.
The transfer of light loads can sometimes impeded by the resistance of idler rollers. Make sure that the idler rollers
spin freely.
Maximum Transported Weight:
Set 1,000kg as the maximum limit of the weight of the load that can be transferred by Power Mollers. If the load
exceeds 500kg, adopt the parallel conveyor system.
Varying Line Speed:
Care should be taken to avoid exposing the Power Moller to excessive shock as a result of drastic load speed
changes within a line or between adjacent lines. Load should not arrive more than 50% faster or 50% slower than
the Power Moller7s nominal speed so as to avoid any long term damage to its mechanical structure.
Speed Variation:
Speed of 3phase AC Power Mollers (< 300V) can be varied by using frequency inverter. Use of frequency inverterin higher voltage (> 300V) is not recommended.
Speed of DC Power Moller incorporating magnetic motor can be varied by changing supplying voltage.
Speed of DC Power Moller incorporating brushless motor can be varied by turning potentiometer on its standard
Driver Card.

Speed Deceleration in Slope:
When the speed of AC Power Moller reaches more than 10 to 20% above its nominal speed, a braking torque isgenerated as a nature of induction motor. This effect can be used to decelerate the load speed on self-travel
gravity conveyor as a brake roller.
Inertia:
As a result of inertia of motor incorporated, the Power Moller will not stop instantly after electrical stop.
Inertia values differ in accordance with motor type, speed and weight of the load.
Inertia can be eliminated by using built-in brake option.
Brake Information:
Built-in brake option is recommended, when precise stop or positioning of the load is required in a conveyor line.
When not powered, the built-in electromagnet uses spring force to lock the motor and prevent the roller rotation.
The motor is released when the brake is powered (energised) Stopping distance may vary slightly depending on
the load bottom material, weight and transfer speed, etc.