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Thanks for the troubleshooting advice thus far, all. I'll have questions on tuning next...

Swapped connectors, problem follows the motor. Removed motor, it puts out very little torque. Put x-motor on y-axis, it drives just fine.

I spoke to a friend that's a professional machine tool...

I desoldered the connector and twisted each pair together, then rotated the shaft. There is resistance when I turn slowly, but it slips for maybe a quarter turn at a time when I turn faster/harder....

Apparently it's the Y-motor. It's not putting out enough torque. The leadscrew can be driven by hand without significant resistance. The motor spins when disconnected from the coupling, but can be...

This problem manifests identically when connected to my friend's control box (which had worked the first time I connected it) , so it's not an issue with the pc, drive, db25, or power supply.

My...

That's the next thing I'm going to try. I'll be back at my friend's shop either tomorrow or the day after. More background:

The mill is probably at least 4-5 years old, from what I was told. It...

Hi, I was given a cnc-ready Taig mill (year unknown, 2011-2014 most likely, acme leadscrew) a little while ago and am in the process of getting it up and running. I am currently dealing with a stuck...