Y axis is jerky when cutting

[dandangerous (Dan Dornback)]

Did you check your pulley set screws:

Pulley set screws - XXL

After dealing with the Y1 pulley set screws backing out numerous times on my XXL and messing up jobs, finally decided to implement regular socket head screws - covered here and other places, but a couple points to add for others with the same problem. The socket head screw size you need is M3 x 8mm, you can get a multi-size box from Amazon for $6 that will be more than enough. You want to use “purple” thread locker, it’s low strength and made for set screws. Several brands out there for ab…