Hi Magnus,

the mini-stepper has an internal gearbox and has power enough if you will use a dual speed focusser (I use a Skywatcher 200PDS/1000 as well as a SVBONY 80/560mm APO).

www.thingiverse.com/thing:5160482
www.thingiverse.com/thing:5147337

I`m using the 5V version of the motor but there are also 12V versions. The stepper-driver boards let you select internal 5V or external 12V.There is some information about different versions of this stepper in the web, but cannot find them anymore.

The Arduino sketch starts smoothly and speeds up and slows down smoothly at the end. If you change the code on 1 line you can change the speed.
I patched an old version of the code, added a speed-switch and I'm able to select 2 different speeds as well as manual mode by pressing one of buttons.
But meanwhile I have seen that is not neccessary to have different speeds.However it is not possible to select different speeds in INDI.

The Moonlite protocol is used not allowing different speeds.If you have found the correct focus position it will not be neccessary to go long ways with focusser, especially with the Newton you need a close focus position when starting auto-focus.
Otherweise auto-focus will not work.

Cheers,
Hardy

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