Quote:
Originally Posted by bobson
Yeah, I know but that complicate things a bit. Just to clear something for me, when you say 4:1 you mean encoder shaft=4 and Alt or Az shaft=1, or other way round?
I am getting confused a bit and thats why direct drive would be preferred method 
bob |
4 on telescope shaft, 1 on encoder. This way you have up-reduction 4:1.
Well, it does complicate a bit, but have alook at what I have done... I have 120mm wheel on scope, and 6mm diameter shaft on encoder (with 48 ppr). This is 20:1 ratio.. (however offset by small number of slots in optical wheel, but I still have ~7000 tics per rot and it is enough for me)
I simply drop the scope in and that's it.
You can use the section of timing belt, to prevent slippage.