#Layer Shift? Tap Issue?

15 messages · Page 1 of 1 (latest)

tight wadi
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Had an interesting issue on my last print. Had what appears to be a layer shift, but at a 45 deg angle. My initial through was loose pulley on the B drive, but all seems well. Checked belt tension, also good (110hz at 150mm).

My next thought is possible skipped steps on the B motor. Have the motor current set to 0.8A at the moment. Maybe I need to bump it? Running moons, so can run 1.2A easy.

Also had someone suggest it could be a tap issue, but my tap seems solid (no wobble).

Take a look at the photos. All walls on this print should be vertical

20240425_210345.jpg 20240425_210331.jpg
tight wadi
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OK might have found my issue. Running 256 microsteps currently on x and y, and after running the TEST_SPEED macro at 300mm/s and 7500 accel (my travel settings) I'm skipping 4-5 full steps.

Turning down micro stepping to 64 nets me 1/4 step loss at the same speeds and accels.

This print that failed had large travel moves (there were extrusion covers being printed alongside) so I'm betting that caused the issue

toxic python
tight wadi
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Pretty sure the skipped steps are my issue. I'll run some prints with long travels and mark as solved if all is good

toxic python
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the layer shifting is always on the same height?

tight wadi
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Only happened once on a print with long travels, and stopped after the travels became shorter

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These parts were printed on the same plate. Notice that the shift stops the layer after the long part was finished

20240425_223047.jpg 20240425_223054.jpg
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I think it confirms my theory

toxic python
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try to move the toolhead by commands to the four 0 and max corners

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and check for noises

tight wadi
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No noises. All movement is smooth

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Other than normal stepper noise

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Reran with updated microsteps. No skips. Print looks good. Going to mark as solved

warped hound