No problem. Recently switched to the 4Nm NEMA-23 steppers from CNC4YOU, driven by some pretty basic drivers which I inherited - Motion Control Products MSD980. This is all run at 68v, which is a bit higher than ideal I know, but dates from when the machine was fitted with NEMA-32 "super bricks", which is how it came to me. I had resonance and speed problems, so swapped out to the smaller motors a little while back. They don't seem to run too hot, hence for now I'm assuming they are ok. Otherwise I will need to downgrade the toroidal!
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