c) Setting of the Tooth Backlash
The distance between the main gear (C) and motor pinion (D) must be as low as possible without the gears being too
tight. How to achieve this?
• Turn the two screws (A) of the gear cover out (B); take
off the gear cover.
• Loosen the two attachment screws (E) of the motor a
little bit so that it the motor can be moved but does not
wobble. Then push the motor with the motor pinion (D)
in the direction of the main gear (C) with light pressure.
The motor pinion and the main pinion now engage with-
out clearance. However, this is not perfect for the service
life of the gears!
• Put a thin paper strip (F) between the motor pinion (D)
and the main gear (C). Then manually turn the main pin-
ion so that the paper strip (max. 80 g paper) is pulled in
between the two pinions.
The pressure of the paper pushes back the electric mo-
tor by the required measure.
• Now tighten the motor's attachment screws (E) again in
this position.
• If you then turn back the main cogwheel so that the pa-
per strip can be removed again, both cogwheels should
have the correct distance.
Ideally, the motor pinion should be as close as possible to the main pinion without the teeth touching and the
gears therefore being tight.
If the cogwheels (motor pinion and main cogwheel) are too far apart, the main cogwheel teeth will be virtually
shaved off by the motor pinion after a few seconds - this will void the warranty/guarantee!
If the motor pinion presses against the main cogwheel (teeth are running without play), this will decrease
performance, increase power consumption (the motor already requires lots of power to turn the main gear)
and lead to premature wear.
50
A
B
A
F
E
D
E
C