Comments (2)
NameOfTheDragon
commented on June 19, 2024
The natural question that occurs to people is: "maybe this is caused by expansion and/or warping". I think I have ruled that out, but it would be worth repeating a similar test when the printer is cooling down or cold just to be certain. I have a print in progresss right now but when it finishes I'll repeat the tests on the cooling cycle. If this is due to thermal movement, then the trend should reverse.
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NameOfTheDragon
commented on June 19, 2024
D'oh! I repeated the test on the cooling cycle and the trend does in fact reverse, which according to my earlier statement indicates that this is actually a thermal effect and not an idempotency issue. I'm sure that in the recent past I have seen changes of up to 2mm, which I find surprisingly high given that my bed mesh variance is only around 0.16. Oh well, when the data disagrees with the theory, the theory is wrong and that's that. I'll close this issue for now at least.
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Related Issues (20)
- Wiki Changelog describes need to change "safe_z_home" instead of "safe_z_height" HOT 1
- Probe trigger height being used as Zero position HOT 1
- [Feature suggestion] Nozzle wipe on Endstop HOT 3
- Do I need to move xy to a safe position myself after G28? HOT 2
- Tap compatibility HOT 1
- Move out of range during Calibrate_Z HOT 3
- Voron Tap support HOT 3
- Z Calibration Off, Printing Above plate HOT 13
- klippy/extras/z_calibration.py untracked HOT 3
- Bed Distance Sensor Support
- Code issue in clearance variable HOT 4
- calibrate_z crashes printhead into bed HOT 1
- If no Bed Mesh, it uses Z endstop height as Zero Position HOT 1
- Is it possible to have a dedicated Z Switch pin instead of just using the Probe Pin? HOT 10
- Automatic detection of the offset between nozzles of different tools. HOT 1
- At end of calibration i get a "unknown command" HOT 2
- [FR] Support for IDM Scanner HOT 6
- Perform Auto Z at KAMP Center HOT 1
- Move from clearance to safe_z_home when no [probe] section defined HOT 1
- Potential issues with oldham couplers HOT 1
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