b) Setting Tooth Flank Play
Control the tooth backlash at regular intervals. Tooth backlash has to be adjusted at the latest when the electric motor,
the motor pinion or the main pinion is exchanged.
Remove the cover (A) of the pinion and main pinion by loosening the two screws (B).
B
Now the motor pinion (D) and the main pinion (E) are visible.
Loosen the two fastening screws (C) of the electric motor so that you can move the motor with slight pressure in the
direction of the main pinion.
The motor pinion and the main pinion now engage without clearance.
Put a thin paper strip between the motor pinion and the main pinion. Then manually turn the main pinion so that the
paper strip is pulled in between the two pinions.
Under the pressure of this paper, the electric motor is pushed back by the required amount. Now fasten the fastening
screws (C) of the motor in this position.
When you turn back the main pinion afterwards so that the paper strip can be taken out again, both pinions will have
the necessary distance to each other.
Ideally, the pinion is as close as possible to the main cogwheel without the teeth touching.
If the cogwheels (pinion and main cogwheel) are too far apart, the main cogwheel teeth will be virtually
shaved off by the pinion after a few seconds – this will void the warranty/guarantee!
If the pinion presses against the main cogwheel (teeth are running without play), this will decrease
performance, increase power consumption and lead to premature wear.
Re-attach the cover (A) and tighten the screws (B).
After each drive, check the tooth flank play; the motor may have loosened or readjusted due to vibrations.
A
B
C
E
D
C
77