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If the nozzle crashes onto the calibration pin key, it can trigger the error. Ensure that the dock is not loose and that it is not between the locked and unlocked positions.

Ensure that the nozzle is correctly positioned in the Nextruder, tightened against the Nube if you are using a Prusa Adapter, and that it is as clean as possible from any residue. Also, ensure that the nozzle is not bent.

This 12 x 28 x 8 mm (6001-ZZ) bearing is a metric deep groove ball bearing. The 6001-ZZ inner diameter is 12 mm, the 6001-ZZ outer diameter is 28 mm, the 6001-ZZ width is 8 mm. This bearing has non-contact metal shields on both sides to protect the bearing from dust or any possible contamination, which can extend bearing life, and retain the lubricant in the bearing.

During XY probing, part of the Tool Offset calibration, if the offset in one of the tools is out of a range of acceptable values, the printer will show the message "Probed XY position is # mm from expected. This is more than allowed difference of # mm". The values in mm will be shown instead of the symbol #. This error prevents a tool collision with neighboring parts of the printer.