My apologies if this is covered elsewhere in the forum. I recently purchased a complete LowRider2 kit from V1 and just finished up my first build with serial wiring on the Rambo 1.4 card (pre flashed for CNC). Everything is appears functioning properly except when I attempt to zero the Z axis using a touch plate. The Z access descends to the probe then raises to the programed height before stopping, however once stops the stepper motor hums for a few seconds followed by this message displayed on the LCD.
Any advice would be greatly appreciated.