Was there any resolution to this?

Cheers Brian

tap tap tap noise after 20+ hours running

- what's the temperture like after 20 hours of running since steppers can start to act funny when they get hot

feedrate was set to 2mm/minute

- thats around .001" / sec or one "clonk" / pulse per second
- the slowest feedrate i ever tried running my steppers with a G201 was 1 "tik" / sec........
  I was just fooling around to test a peck drilling cycle, but they just tiked like a clock and left them run like that for a half hour time.
  Sounded just like a clock and in perfect harmony with the stop watch. ( good grief what i do when i get bored )
Never experienced what you experienced so don't know what to say. Maybe take Hood up on his offer to try a different drive.

Sound is a good indicator and you know what's right when you hear it.
Sorry don't know what to tell ya......
RICH

I'm far....far from being an expert, but I had a similar problem with my homebrewed machine. I'll save you the long story of all I went through. I was using only four of the six wire Nema 34 steppers, so I rewired them and voila, the problem vanished. I had originally wired them for torque rather than speed. I switched two wires and that solved my problem. As I said in the first sentence I'm no expert, not even close to intermediate, but I hope I can help somehow, 'cause this forum has been exceptionally generous to me. If you already tried this pardon me.

Richard B.