Clough42 on YouTube is doing a series on developing an electronic leadscrew for his lathe. I am following the series and implementing his ELS on my Harbor Freight 8x12 lathe. This is my build so far.

Encoder mounting. Encoder: OMRON Rotary Encoder E6B2-CWZ6C 1024P/R 5-24v
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Stepper motor. NEMA23 570oz/in 5A 1/4” Dual Shaft Stepper Motor (KL23H2100-50-4BM) w/ KL-8070D Digital Bipolar Stepper Motor Driver-32 bit DSP Based
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I have it all working on a breadboard. I just need to get the PSU and all of the electronics in enclosures and mounted. Once I'm done with that I have some features of my own that I want to add.

Check out his video series. Very complete and well presented. Go see James @
https://www.youtube.com/watch?v=FTs9GygRQ-U


John