X-Axis self test issue
Hello, I've had my Prusa MINI for a few years, and in the past year or so it cannot pass the X-Axis self test. My prints have been mostly satisfactory so I ignored it for awhile, but it seems there may be a recent firmware update that now nags me every time I start a print, so I've taken a closer crack at diagnosing.
No matter what I've tried so far, it consistently fails "rew X-Axis u/50 mm/s", landing above the target <182,192> range.
1902.452s [INFO - Selftest:10] X-Axis Started
1902.555s [INFO - Marlin:10] enqueueing "G28 X I D P"
1902.555s [INFO - Selftest:10] X-Axis home single axis
1902.653s [INFO - Marlin:10] endstops hit: X:-1.76 Y:-3.16
1902.757s [INFO - Marlin:10] endstops hit: X:2.40 Y:-3.16
1902.788s [INFO - Marlin:10] X:180.40 Y:-3.16 Z:4.00 E:0.00 Count X:18040 Y:-316 Z:1600
1902.988s [INFO - Selftest:10] fwd X-Axis u/50 mm/s
1902.988s [INFO - Marlin:10] X:180.40 Y:-3.16 Z:4.00 E:0.00 Count X:18040 Y:-316 Z:1600
1907.004s [INFO - Marlin:10] endstops hit: X:-7.44
1907.054s [INFO - Marlin:10] X:-7.44 Y:-3.16 Z:4.00 E:0.00 Count X:-744 Y:-316 Z:1600
1907.054s [INFO - Selftest:10] X-Axis measured length = 188.239990mm out in range <182.000000,192.000000>
1907.088s [INFO - Selftest:10] rew X-Axis u/50 mm/s
1907.088s [INFO - Marlin:10] X:-7.44 Y:-3.16 Z:4.00 E:0.00 Count X:-744 Y:-316 Z:1600
1911.104s [INFO - Marlin:10] endstops hit: X:180.40
1911.154s [INFO - Marlin:10] X:180.40 Y:-3.16 Z:4.00 E:0.00 Count X:18040 Y:-316 Z:1600
1911.154s [ERROR - Selftest:10] X-Axis measured length = 193.279999mm out of range <182.000000,192.000000>
I I've tried loosening/tightening the belt, using the belt tuner app, but I can only get the X-Axis measured length to vary by tiny amounts.
487.468s [ERROR - Selftest:10] X-Axis measured length = 193.429993mm out of range <182.000000,192.000000>
1070.794s [ERROR - Selftest:10] X-Axis measured length = 193.279999mm out of range <182.000000,192.000000>
1574.927s [ERROR - Selftest:10] X-Axis measured length = 193.289993mm out of range <182.000000,192.000000>
1911.154s [ERROR - Selftest:10] X-Axis measured length = 193.279999mm out of range <182.000000,192.000000>
Can anyone advise what I'm missing? Thanks in advance.
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RE: X-Axis self test issue
Add washers to the rods so you will limit the distance the print head can move.
Also double check the grub screw on the x axis of the motor if it is fixed so that the axis is not spinning while the belt is not moving.
See my GitHub and printables.com for some 3d stuff that you may like.
RE: X-Axis self test issue
Sorry for not knowing something everyone else seems to know, but how do you view these detailed calibration reports? I'm having problems with the x-axis too, and having this information might help me figure it out.
RE: X-Axis self test issue
- install Pronterface from the official packages (optionally install system packages under windows) https://github.com/kliment/Printrun#linux-packages-from-official-repositories
- connect USB cable between computer and mini-USB port on the Mini
- launch Pronterface and expand the window so that the right pane with the console can be viewed
- in top left corner under Port select the desired port (for linux for example /dev/ttyACM0 ) and click Connect
- look if tou can see 'Printer is now online.' in the log (otherwise debug what is wrong, some cables are for charging only)
- go to the printer and in menu select Auto Home or any callibration menu
- see the messages in the Proterface output window
See my GitHub and printables.com for some 3d stuff that you may like.