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Hi Lee,
I just found your thread on the focuser you built.
Nice work
My one is using the motor direct to the 10:1 shaft, but in hindsight I might use a pg5 nema17 as Robert Brown suggested to me a couple of weeks ago, but holidays caught up with me.
I have now ordered one, I should have it by the time I get back.
Originally I had the issue of the stepping being to slow.
But due to Robert's very fast response to writing new code for his "MyFocuserPro" It now drives very quickly over a 4 inch range.
My one does lose some steps, but I think this is only when driving full speed, from home to say 10,000 steps. Slippage on the 10:1 shaft, even tho I had adjusted this to fairly tight, it still must slip.
It's not used manually now so the tightness is not a problem, but don't want it to cause undue wear on bearings etc.
Oh PS my focuses are all rack and pinion type, so that's what I am going to direct drive using the PG5 Nema17 to carry the torque load.
Clive.
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