iOptron CEM70 Instruction Manual page 48

Adjust the gear adjustment screw on the side inside the large hole by using the 3mm hex key. Turn
counterclockwise to loosen the meshing or turn clockwise to tighten the meshing.
If the motor stalls or the mount does not tracking smoothly, most likely the meshing is too tight. You
may loosen it by about 1/8 turn (or less for tracking). Tighten the set screw in the small hole to
LOCK the gear screw (important) before test the mount. Adjust again if needed, but no more than
¼ turn in total.
If you feel there is free play between the worm and gear, you may tighten the gear screw to eliminate it.
To Adjust RA Gear:
The RA gear meshing adjustment screw is located next to the RA Gear Switch. The adjustment is same
as that for DEC gear/worm.
3mm
5mm
Please contact support@ioptron.com if you need more information.
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