Hi guys,
I think that I have found what is going on.
Since a couple of weeks I changed the Smoothstepper for an UC100 USB to PP.
This to activate the Mach3 backlash control.
Then the problem with stalling on G43 appeared.
I have tried your advise and changed the Postprocessor.
That did not help much. Sometimes the G43 line worked with no problem, but the second or third time the Z down stalled again.
That got me thinking, put the Smoothstepper back in or disable the backlash control.
As disabling the backlash was easy and quickest I did just that.
The G43 problem was gone.
Back to the standard BC_3x_mill post and that worked too, flawlessly .
The backlash control made the axis jump a bit, so I suspect a spike from the stepper motor might have introduced the G43 fault.
I will replace the Lovejoy L-50 couplings as the backlash is too much.
Thanks for thinking with me,
Jos Raven
Holland
Jos Raven PA0AMX