ym1964 shared this project on Thingiverse!
You need some M3 bolts with nuts.
2 M3 (8mm) bolts with nuts in the gear. You put the nuts in the gear central hole and you screw the bolts in. They will be tight on the scope shaft.
2 M3 (30mm) bolts with washers and nuts to hold the motor.
You need a small belt that you cut and glue at the right length.
And I use a commercial gear for the motor.
The cap covers the end of the scope shaft.
Many arduino projects use step motor as electronic focuser.
I used EQFocuser and I’m fully satisfied.
Download files: https://www.thingiverse.com/thing:4652436
Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!
Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!
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