iOptron CEM26 Manual
Worm play identification and adjustment
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Also See for CEM26:
- Quick start manual (6 pages) ,
- Instruction manual (49 pages) ,
- Instructions (3 pages)
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Tool needed: a set of metric Allen wrench and a
small flat top screw driver, a pair of nose pliers or
tweezers.
1. After open the RA/DEC ring gear cover to
expose worm assembly and ring gear, exam
the worm assembly movement when hold and
rotating the ring gear.
(1)
(1) If the whole worm assembly moves up and
springs back down, this is normal for a
spring loaded worm/gear system
(2) If the whole worm assembly moves left/right,
or even gets free at one end, the hinge(s)
may get loose. Go to next step to fix it.
(3) If only the worm itself is moving freely, the
worm end cap needs be tightened. Please
refer to
Step 13
2. Remove mount motor cover.
For iOptron Internal Use Only
CEM26/GEM28 Worm Play Identification and Adjustment
(2)
(3)
to adjust it.
3. Carefully unplug the motor cable from the DEC
control board.
4. Release two screws and remove the motor
5. Check the worm assembly to see if both hinge
pins are in position. They should be almost
flash with the bearing.
Hinge pin
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Summary of Contents for iOptron CEM26
- Page 1 For iOptron Internal Use Only CEM26/GEM28 Worm Play Identification and Adjustment Tool needed: a set of metric Allen wrench and a 3. Carefully unplug the motor cable from the DEC small flat top screw driver, a pair of nose pliers or control board.
- Page 2 For iOptron Internal Use Only 6. Check two hinge locking screws. Make sure 10. Thread the belt over motor pulley and attached they are tightened. the motor to the worm assembly. Tighten the screws slightly. 7. Release hinge bearing end cap locking screw half turn.
- Page 3 For iOptron Internal Use Only 15. SLOWLY Pull the gear switch knob outwards. Put your palm underneath to collect the little spring and the ball bearing. The ball bearing is spring loaded and very easy to be sprung off. 17. Remove the hinge pin bearing end cap. Use a small screw driver to push the hinge pins inward.
- Page 4 For iOptron Internal Use Only Set screw 22. Put the worm pulley back on to the worm shaft. Locate the flat surface on the shaft and tighten the set screw onto it. Make sure that the worm shaft end if aligned flash to the pulley surface.
- Page 5 For iOptron Internal Use Only 25. Insert hinge pins while insert the washer 28. Tighten the hinge end cap set screw. Check the between the bearing and worm assembly body. play again. Tap the hinge pin inward to make sure its end flash with the bearing surface.
- Page 6 For iOptron Internal Use Only 32. Check the play with worm/ring gear engaged while rotating the ring gear. 33. Follow steps 10-12 to put the motor, control board and cover back.