Halfway through a print the other day and all of a sudden the X-Axis stepper suddenly started behaving really oddly in that it suddenly just started jerking in only one direction (right) and just wouldn't move left. I had to power off the BigBox, and on powering it on, when I try to move the x-axis, it either judders back and forth or moves a little to the right. I've checked the connections to the Rumba and all looks fine and also checked the voltage for the X-Axis stepper and that is right where it should be. I've tried changing the Motor to another one and that behaves exactly the same. I've also re-flashed the firmware to see if that made a difference and of course it didn't. I'm now out of ideas and hoping that someone may be able to help?