Hi,

I have built my own prusa i3 a few months ago, It was all set up and printing well. I took a few weeks break from printing to built an enclosure for it.
I have just finished building the enclosure, I have the printer inside the enclosure with my arduino/ ramps board and psu all mounted to the back side of the enclosure.
I have plugged everything back in and checked the wiring, it connected to pronterface fine and I started checking my axis, x moves correct y moves correct then i checked z, it appeared to be correct but then it jammed.
I reset the z so both sides were equal distance and tried again, worked fine then jammed. On closer inspection I realized that my left z axis stepper moved correctly but my right axis stepper motor would spin in 1 direction and then change and spin the other way.

Has anyone encountered this? How can I fix this?

Thanks.