Homing error Z #17301 (XL)

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What happened?

The printer displays the message "Failed to home the Z-axis, make sure the loadcell is working".

Error name: Homing error Z

Error code: #17301 

How to fix it?

Check if the nozzle is not loose

You can check this by holding the heater block (make sure that the nozzle is not heated!), and use the Torx TX8 as shown in the picture to tighten the set screw. The nozzle has to be unable to move. 

Test the loadcell

A fault in the loadcell can trigger a homing error. Ensure that the printer is fully cooled down, go to LCD Menu - Calibration - Diagnostics - Loadcell Test, and tap the nozzle from the bottom.

During the test, see if the numbers shown on the screen will change. In case the number does not change when you tap the nozzle, please contact our customer support.

Reduce vibrations

Any form of vibration propagated to the surface under the printer, or a not fully stable surface under the printer, might cause a false reading on the loadcell, triggering the homing error. 

A printer that is in operation next to your Original Prusa XL can be a possible cause of vibrations. An easy solution to dampening the noise and vibration of a printer is to add some additional padding underneath the printer.