EQ 3.2 AR stepper motor for NEMA23

thingiverse

I wanted to add a motorization to a (quite) old EQ 3.2 equatorial mount.I have only NEMA23 motors and a CNC shield for arduino. Since the stepper has 1.8 degrees for step, I wanted to reduce to 0.6, so I've added a GT2 20 T on the motor axis and a GT2 60T on the AR axis, bringing the whole to 0.6 degrees.Since the worm gear has 144 teeth, for each complete turn the telescope AR is moved of about 144*24/360 = 0.1666 degrees, or 10 minutes.10 minutes = 600 seconds. 600 seconds / (200*3) steps = 1 second/step.Microstepping the motor to 32, makes a quite smooth movement in the sky.Needed 2 ball bearings 5x13x4: https://www.amazon.it/gp/product/B092QNQ3LK/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1Enjoy!