Prusa mini X Y axis selftest failure

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DBuhr

(@dbuhr)

Active Member

Prusa mini X Y axis selftest failure

Recently updated the firmware to 6.2.2, and the selftest won't go through.
I did a bit of online research, and found that others where experiencing the measurement of the axis being off. Same in the case of my machine.
Some have had success adding small spacers to hit within the expected range, but I was wondering if there is some way to enter a "secret" menu and adjust the values?

Here is the output from the log file:

52.734s

[INFO - FileSystem:7] Started logging to file: /usb/log.txt77.134s

[INFO - Selftest:10] Fan test 0 started88.234s

[INFO - Selftest:10] Print fan 0 4755 RPM in range (10 - 10000)88.234s

[INFO - Selftest:10] Heatbreak fan 0 8090 RPM in range (10 - 10000)106.434s

[INFO - Selftest:10] Print fan 0 2370 RPM in range (10 - 10000)106.434s

[INFO - Selftest:10] Heatbreak fan 0 5229 RPM in range (10 - 10000)110.876s

[INFO - Selftest:10] X-Axis Started110.979s

[INFO - Selftest:10] X-Axis home single axis110.979s

[INFO - Marlin:10] enqueueing "G28 X"112.979s

[INFO - Marlin:10] busy: processing114.979s

[INFO - Marlin:10] busy: processing115.816s

[INFO - Marlin:10] endstops hit: X:182.73115.827s

[INFO - Marlin:10] X:180.40 Y:-3.00 Z:4.00 E:0.00 Count X:18040 Y:-300 Z:1600116.038s

[INFO - Selftest:10] fwd X-Axis @50 mm/s116.038s

[INFO - Marlin:10] X:180.40 Y:-3.00 Z:4.00 E:0.00 Count X:18040 Y:-300 Z:1600119.804s

[INFO - Marlin:10] endstops hit: X:-0.57119.854s [INFO - Marlin:10] X:-0.57 Y:-3.00 Z:4.00 E:0.00 Count X:-57 Y:-300 Z:1600119.854s

[ERROR - Selftest:10] X-Axis measured length = 181.369995mm out of range <182.000000,192.000000>122.034s

[INFO - Selftest:10] Y-Axis Started122.137s

[INFO - Selftest:10] Y-Axis home single axis122.137s

[INFO - Marlin:10] enqueueing "G28 Y"122.335s

[INFO - Marlin:10] endstops hit: X:-0.57 Y:1.68124.137s

[INFO - Marlin:10] busy: processing126.083s

[INFO - Marlin:10] endstops hit: X:-0.57 Y:-180.08126.094s

[INFO - Marlin:10] X:-0.57 Y:-3.00 Z:4.00 E:0.00 Count X:-57 Y:-300 Z:1600126.296s

[INFO - Selftest:10] fwd Y-Axis @50 mm/s126.296s

[INFO - Marlin:10] X:-0.57 Y:-3.00 Z:4.00 E:0.00 Count X:-57 Y:-300 Z:1600130.012s

[INFO - Marlin:10] endstops hit: Y:175.40130.062s

[INFO - Marlin:10] X:-0.57 Y:175.40 Z:4.00 E:0.00 Count X:-57 Y:17540 Z:1600130.062s

[ERROR - Selftest:10] Y-Axis measured length = 178.399994mm out of range <181.000000,193.000000>

Best Answer by FoxRun3D:

To answer your question:

https://help.prusa3d.com/article/experimental-settings-mk4-s-mk3-9-s-mk3-5-s-xl-mini_264396

Where you can adjust the Z length. No idea why that was suddenly necessary with the Mini but I had to do it too.

This topic was modified 1 month ago by DBuhr

Posted : 16/03/2025 3:46 pm

Jürgen

(@jurgen-7)

Honorable Member

RE: Prusa mini X Y axis selftest failure

Wrong part of the forum, I'm afraid. If you take a look at the top-level forum structure, you will find sub-forums for each printer model. This here is the sub-forum for the new Core One (which also runs a different firmware, not 6.2.x). Better post in the Prusa MINI forum -- and there in the sub-section on "Hardware, firmware and software help".