Thanks a lot for the excelent advice,

I'm just concerned about the microstep selection, actually I've found the right balance in my cnc, I run 3 2M2280N coupled with 3 12NM nema 34 motors, I could run my cnc as fast as 10m/min in rapid and 2,5m/min while working (mach3, parallel port), but in a work of 4 hours it loosed the step and I had to trash the work out, so i reduced the microstep resolution to half step and it seem to work right, but the motors do a hell of a noise.

I've read different opinion on the web about microstep resolution, someone says that the more you set higher this value the lesser will be the torque, others says that in the modern drivers, microstep res. almost do not afflict the torque,

Who do I have to listen to?


Can you explain how this value can be taken in account?


Thanks a lot if you can reply.


M.


P.S. I'm wondering to move to servo with brushless motors,maybe this can be tha solution?