Layer shift - stepper skipping suspected

I now suspect that my layer shifting issues are caused by the steppers skipping steps. How I came to this conclusion: Current config: VC4-300 CoreXY, but set up in Hybrid mode. Hybrid belts disconnected, but motors still wired up 1. Using a white marker, I put a mark on the belts right where the grub screws of the CoreXY pulleys were. 2. Ran a print which layer shifted 3. Checked marks on belts - still lined up with grub screws 4. Checked grub screws - still tight and still aligned to flat faces of stepper spindles Can anyone advise - do you think I am drawing the correct conclusions from this test, and do you have any ideas of what I could try? Is running in Hybrid mode like this bad? I tried switching it to CoreXY mode, but it does not appear to be that simple, as the default motor pins for CoreXY are not the same as Hybrid
1 Reply
evilC
evilCOP5w ago
I also have another issue worth mentioning that I think is maybe related. I get this clicking sound coming from the stepper area when the toolhead moves around. Initially I suspected the idlers, but I have just done a test which leads me to believe that it's the steppers: I loosened the grub screws on the steppers, and held the stepper spindle in place with a pair of pliers. I then moved the toolhead around - such that the stepper pulleys were spinning, but the stepper axles were not turning. The clicking sound went away
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