Serious y-axis issues

X-axis is beautiful, almost perfectly smooth. y-axis, I don’t know what’s going on with it. Here are my speed settings:

How is the clearance on the y axis stepper motor pulley? Is it above the surface of the stepper motor or does it sit right on the motor body? You will also want to check the belt tension, it should be springy and taut, yet still move smoothly.

Check for a loose belt and/or a loose pulley.

Y-axis belt pulley was loose and resting against the motor body. I’ve fixed that and am doing a test print right now.