Y axis stopped moving

Mostly Printed CNC - MPCNC Troubleshooting
1

I was running the MPCNC for a couple of hours today and stopped for lunch. When I went back to work the Y axis Stopped moving. It buzzes and jerks but it doesn’t move.

  1. Unplugged the steppers form the controller board and X and Y moves freely.
  2. Swapped X and Y, and X will move correctly when plugged into Y on the controller board. So the controller is good.
Moving freely with servos unplugged

http://sdunsmuir.net//pics/IMG_7676.mov

Not moving and jerking and buzzing.

http://sdunsmuir.net//pics/IMG_7678.mov

So this happen after power down from a good cut. Aka the Happy Halloween post.

Bad servo, wiring, any ideas?

Thanks

2

Yep, one of the wires came loose.

2 Likes
3

Ugh… thought that might be it. They’re so tidy… time to rip em up.

4

Usually it’s the extension connection in the middle. That’s one of the reasons I redid all mine to use cat-5 patch cables.

5

Bad Molex crimp. Thanks for pointing me in the right direction. Back in business.