Ah… I must have missed that.
Try even slower. Like 300 mm/min.
What do you mean by stick? What happens physically?
The part about it only happening when the laser fires is likely interesting.
I consider 6000 mm/min quite fast. As in I doubt you could ever achieve these speeds and certainly never use them, even it the MCU could support those speeds. I take any such marketing claims with a grain of salt.
The Atomstack A5 carries a stepper motor on the X-Axis gantry. Between that and the rest of the weight laser module it would be difficult to achieve those speeds. But maybe others with experience with that laser can speak up.
From this earlier Topic the A5 appears to be an Atmel based controller compatible with Arduino. So it’s definitely 8-bit.
What do you mean by parallel? Was one power supply connected to the controller and one to the laser module?
Where is the new power supply plugged in? What it the current rating for each power supply?
It’s certainly possible. The power supply and controller would be the vulnerable components, especially if the controller is not designed for that much current. I recall that the M50 by itself draws over 3A.
What is the timeline of the power supply incident and when you noticed problems?
If you have a meter, check that you’re getting a reliable 12 V from both power supplies.
I’m trying to think of where this leaves you. Maybe try switching the X and Y steppers. See if the problems follow the motor or follow the path.