Why plastic washers instead of springs? Is the bed sagging due to the washers deforming with heat?
I still have this problem. The right side of the x axis is loose on the upright for me. Adding a dual z-axis didn’t help much, it still sacks sometimes. Next step is to add a cr-touch or completely rebuild. I’d also like to hear some other ideas for permanent fixes
I just checked the right side of gantry arm. I can move it a little if I push kind of hard but there's no "play" in it. I don't think I could tighten that down any more without stressing the motor. I wish I had some reliable way to measure what's actually moving but the only movement I can detect is the z-offset drift.
@prismo I just did some more checks. If I adjust the z-steps to paper height I can put it out of alignment by pushing the right side of the gantry arm up or down. There obviously isn't perfect synchronization between the left side (where the drive screw is) and the right side (where it's just pulled along by the rest of the gantry).
I'm gonna play around with the eccentric nut and some grease to see if I can get it consistent and report back.
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