Please give me feedback on the rough model for my new project! An Equatorial Mount that requires very precise motion.

Please give me feedback on the rough model for my new project! An Equatorial Mount that requires very precise motion.

Disclaimer, I am a novice when it comes to robotics.

I have begun designing an astronomy camera mount that will be 3D printed, and powered by a basic arduino stepper motor circuit. It requires very slow and precise movement. I’m hoping to get feedback on my general design. I’ve attached a *very* rough Google Sketch-Up model below that will hopefully help illustrate what I’m about to describe. I’ve also attached a picture of a similar professional Equatorial Mount.

The goal of the model is to have two arms slowly turned apart at a set rate of angle per time. To increase the precision of this motion, you increase the distance between the axis of rotation and the driving arm.

In my project, I’m thinking of using a stepper motor, followed by a gear ratio of 1:4 (or so) followed by a beveled gear system, with the final gear mounted on a curved “fine adjustment screw”. The fine adjustment screw, which is illustrated so beautifully in my model, will be attached to the upper arm. I’m mostly concerned with the general system, not the specific geometry of each piece, like the horrid “beveled” gears.

Any feedback on my concept and model is highly appreciated…. especially the gear system, I have practically no experience with gears. Would this gear system result in high precision motion? Am i going about this all wrong? How would you tackle this problem? I’m hoping to minimize any vibrations or backlash that may be introduced into the mount.

Thank you for taking your time to read this!!!

https://www.thingiverse.com/thing:3114047

https://i.redd.it/alcoh3tctun11.png

https://i.redd.it/o1ok9ctctun11.jpg

submitted by /u/Doughnutkiller
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