Originally Posted by
joeavaerage
Hi,
what drives are you using for the steppers?
The steppers and drives are from automation direct and are matched per their support.
5A on a 48 volt PS.
I would guess that 570 oz.in steppers will require 5A or so, rather more than what I would expect from a GRBL board. Additionally what voltage are the drivers? If it 24V or 36V then you
can expect your steppers to crap out beyond a 100rpm or so. If you want them to go fast then you'll need over 60VDC drivers and 80VDC preferred.
I built this machine in 2019 and it has been running with no issues since then until this week. I was at the end of a thousand or so piece run when it started acting weird. I get 400 in/min rapids and I was cutting with a .125 compression bit at 40 in/min.
Try reducing the max speed of the steppers (the G0 speed) to 1/4 and see what happens. Steppers lose torque the faster they go. If you ask that they go faster than the circumstances
(driver voltage, current, mechanical load) allow it will start missing steps if not outright stall. If reducing the speed helps then you know what areas to look at.
Craig