Yes, follow Peter's advices! My machine is ok now with UCCNC from Stepcraft (with UC 100 controller).

Confused and frustrated Stepcraft 420 with mach3 I read on here that ideal steps per Unit in motor tuning is 133.333333. I tested this on a 8...

I followed the steps and found several irregularities in the drive pulley. still hear strange noises and have to intervene. engine runs better now, it...

Thank you Doug, I will write to my dealer.

I checked the mechanics and that's okay. I disconnected the tooth belt and then I tested the engine. The problem is here: it works smoothly at very lo...

Sorry, I can not upload a video here, so I published it on youtube:

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still trying to upload video...

This is the video

Big thanks for Rory! He sent me the Stepcraft Profile for Mach 3 and it works! Kind Regards!