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Old 21-06-2020, 06:50 AM
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bojan is offline
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,442
I printed timing gears for eq3 mount (post #32) it is sufficiently accurate even for tracking of 200mm lens.
There are number of parametric design available on Thingiverse, I used (for ALTAZ encoder) and commented this one, there was an issue with code, read the comments and correct the code accordingly:
It is definitely worth a try to print the pulleys and gears.. any inaccuracies will be sorted out with guiding anyway.

Perhaps you should consider friction transmission, like this one (inspired and driven by Mel Bartels' software) or similar

Bigger wheels can be made from plywood, without access to "real" lathe, with relatively simple jig (using router).

See here:
and here:

For electronics, I highly recommend OnStep (

Last edited by bojan; 21-06-2020 at 07:10 AM.
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