I was able to solve the problem, clean behind the z truck and continue carving. Thanks for everyones reply. I have two problems, I have been carving for several hours and turned off machine in usual way and returned several days later. Problem when it homes it stall with an error message 05-0303 y axis stalled and press stop. When I try to move the z truck to the center to check for any debris behind it wont move. what is the problem