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sporkus / probe_accuracy_tests

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How to fix the z-drift? #42

Open zhou13 opened 4 months ago

zhou13 commented 4 months ago

Thanks for providing such a great scripts to debugging the voron issues. It seems that my printer has some drifting issues according to your tests. The results are very similar to yours that "On Voron V2 printers, the most common issue is loose z-belts. An example from a printer with loose belt will look like the below image". My z drift is more than 0.02mm over 30 trials.

I am trying to find out what is wrong with my printer. What did you do to fix the problem on that printer? Should I just make the z belt tighter?

20240628_0102_corner_test

zeplintwo commented 3 months ago

Based on the graph you can tighten or loosen the belts that have the larger scatters in the plots. When i was adjusting mine i would do a half turn of the adjustment bolt in my v2. As then rerun the corner data again. I never got it perfect as i had to one belt that would not play nice. As soon as it got a good plot it would throw the other 3 out. So i backed it off on tension to get three back in to good scatters and left that one belt just out of 'good' I settled for 'good enough'.

zhou13 commented 3 months ago

@zeplintwo Thank you for sharing the experience. I tried to tighten the belt 4 that has the widest spread, and it slightly improves the plot (I forgot the exact number, but probably improved 20%). I will just call it good enough :)