This prompt indicates that the K2 Plus Z-axis homing did not successfully return to the maximum position, or the tilt calibration failed at that position. The lower limit of the Z axis of the K2 Plus is controlled by the left and right limit switches, which need to be triggered to complete the leveling while homing, and then return to the upper limit.
Check Z-axis movement: Observe whether the Z-axis homing is blocked or stuck, and confirm whether its movement is smooth.
Check limit switch: Make sure the left and right limit switches are working properly and are not damaged or loose.
Observe the Z-axis movement to see if there are any factors preventing it from homing, such as waste or other foreign objects.
Click Z-axis homing again to check whether it is restored
Check the connection of the left and right limit switches to ensure that they work properly.
Restart the device and observe whether Z-axis homing and tilt calibration can be successfully completed.