Nema 23 smooth shaft mountings?

[Clive S]

Should I
1. Try to file the motor's shafts down?
2. Not file the shaft down and use the couplings as is with the round shaft? This is easiest but how much will it affect power or skipped steps?
3. Have some new couplings custom made with the motor mount side a tight fit and hydraulic pressure fit them to the motors?

1. You can grind a flat on the shaft with a dremel type tool.
2. Couplings like these https://www.aliexpress.com/item/A106...485607827.html can be used.
3. Press fitting is not a good idea.

Have you thought about keeping all your questions in one place on the build log that would make it easier to keep track of. Good luck with the build.