@AaronG welcome
Grab each of the y-axis ball screws with your hand and see if you can move them back and forth or rotate at all.
These ball screws should be absolutely stationary with no movement. If you do have movement tighten up the Allen key at the end of the ball screw.
Once you’re finished home your machine.
Also check your x axis ball screw for any movement too
That’s my first thing to check I didn’t notice any looseness I did try and tighten to no avail. I did end up completely backing them off and retightening and it seems to have worked to the naked eye but my cuts are still slightly off. I’m cutting some thin full face flanges essentially so I measure the holes in perspective to the edge and they are all slightly off around 50 thousandths.




