Appendix D. Gear Meshing Adjustment - iOptron CEM40 Instruction Manual

Appendix D. Gear Meshing Adjustment

CEM40 gear is designed adjustable by customer although in most cases not necessary. If you
experienced DEC/RA motor stall occasionally, or there is free play between the worm and gear, follow
this instruction to adjust the gear meshing.
Tool needed: 2mm and 3mm hex keys.
1. Gear Switch
iOptron Gear Switch uses a spring plunger to apply the force on worm assembly to push the
worm against the ring gear for gear meshing. It has a tuning knob, body, threaded spring plunger,
positioning spring and ball bearing.
Spring plunger
Locking screw
(2mm wrench)
Hole for spring &
ball bearing
Spring plunger
(3mm wrench)
47
Knob
Body
Spring & ball bearing
Locking screw inside