|
Losmandy gm8 worm adjustment
I have a new GM8 with Digital Drives, using a 120mm ED refractor for visual observation. I have experienced issues with play or slop in the DEC axis. An inquiry to Losmandy received a verbose reply "worm to worm gear setting" Basically, position the worm closer into the worm gear to reduce it. My question is, how close can it be positioned before it causes too much friction?
Secondly as the evening temperatures drop the RA worm seems to lose contact with the worm gear and the hand controller can't move the scope in RA but the motor is audibly working. I have adjusted the worm somewhat closer, but again the question, how close?
A suggestion was to set the distance between the worm blocks and the mount using an automotive feeler gauge which I have at my disposal but no mention of gauge thickness (distance of block from axis) A concern is "what is the right setting and proper methodology to resolve these issues"?
The Losmandy User group, to which I belong, appears to be dedicated to owners whose interests lay in astrophotography, reducing periodic error, etc. but nothing as mundane as my problem.
When one uses a long refractor, it places a polarized load on the mount versus a compact OTA, any play, particularly in DEC axis has an adverse effect, so what is an acceptable tolerance in this area?
Stephen
|