Welcome to the forum.
No. It will go back and forth about 1/4”. Something is hamming it but I can’t find anything. My guess is it’s maybe a loose screw in the gantry guide, but I can’t even figure out how to get to it.So with the motor and ball screw disconnected are you able to freely move the gantry by hand?
Thank you!Check the cable track. Or one of the bearing blocks could have gone bad. Those are 15mm rails, so finding a new set of blocks shouldn't be difficult. You also might want to call Chad at Axiom.
Remember, the Y is the 4ft run and the X is the 2ft run. Some sites turn this around on people. Everything for the Y would be underneath the frame as all cables run through this main cable track. I design and build CNCs, and sell the Axioms. Your problem is unusual as I had very few problems with the Axioms except for couplers wearing out, or customers not tightening the Z coupler tight enough, which causes slippage due to the weight of the spindle. Unfortunately I'm in TX, so I can only give you places to look.Thank you!