Guys,
Having a strange issues that started last night.
I have isolated it down to the z intermittently step up when it was commanded to step down; only while the spindle is running.
So my cuts keep getting shallower as the code runs on. If it disable the spindle, and check my zero after running a program; its spot on. if i let the spindle run, i can be as much a .500 above the orgin point!
4X4 pro with linear bearings
chinese spindle
mx4660
leadshine NEMA 34 stepper.
been setup and running for 2 plus years
The only thing that has recently changed is setting the dust collection up so mach can turn it on and off, but that was 1 weeks ago.
Have been running the machine pretty constant for the last 6 weeks. That is probably the biggest change..
thanks for any sugjestions.
landy