z-probe problem


Any idea what the problem could be?
When i follow the manual for z-probing i get this error after a mechanical working z-probe. After the last probe it moves up for some centimeters and then stall with this error:

16:13:41.179: X:0.00 Y:0.00 Z:830.000 E:0.0000
16:13:51.538: Z-probe:17.20 X:-150.00 Y:-100.00
16:13:54.258: Z-probe:9.12 X:0.00 Y:0.00
16:13:56.887: Z-probe:15.67 X:150.00 Y:100.00
16:13:57.562: Transformation matrix: 0.832050 0.554700 0.000000 0.000000 0.000000 -1.000000 -0.554700 0.832050 0.000000
16:13:57.562: Printer height:NAN
16:13:57.563: Info:Autoleveling enabled
16:13:58.042: X:180.28 Y:-25.00 Z:-0.000 E:0.0000
16:13:58.043: Info:Autoleveling disabled
16:13:58.056: RequestPause:Homing failed!
16:13:58.058: X:0.00 Y:0.00 Z:0.000 E:0.0000
16:13:58.058: Info:Autoleveling enabled

I have to hard reset the printer to get it working again.
The real height is about 814mm, but the probe height is set as 20mm, so i think this should work.
I am using the repetier server 0.65.0
and firmware 0.92.4 and Radds

Any suggestions?


  • Printer height:NAN

    sound like in eeprom zlength has not a valid number. Please check the eeprom contents.
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