Hi Guys,
After hibernating for quite a while, I decided to put my MPCNC back to giant printer configuration, to see how much I could improve the printing quality.
But it seems like I have a strange issue: the printer seems to do some random stuff.
Sometimes it will print fine for an hour or more, then becoming suddenly crazy, going in a direction, then coming back. Sometimes it will just do crazy stuff after 2 minutes, or 5, or 10, or… well there is no real pattern. It is quite weird, since the printer will go straight in X or Y direction for something between 10 to 100 mm or more, and then it will come back again to its original position and continue printing as if nothing happened. This happens also with the extrusion motor, it will sometimes retract for 100 or 150 mm (yes, there is no typo) and then prime back again. I don’t understand why.
It happens randomly at different times, even with the same gcode.
I tried to swap my arduino mega for a new one, which didn’t solve the issue.
I’m wondering, what could it be? It used to print fine a few months ago, so I don’t really know what could suddenly have gone wrong. Any suggestions?