Haas Alarm: 622 (L) C AXIS ENGAGEMENT FAILURE – The C-axis failed to engage or disengage in the time specified in Parameter 572. Either gears are not meshing or the mechanical stop is not set properly. Check the engage and disengage switches and the mechanical stop. Also, check the grid offset for the C-axis. This alarm can also be caused by an obstruction or by low air pressure to the actuating piston.