Q: We are using a machine with GSK 980TDb CNC control, the X and Z axes could not return to reference point, when the block hit the travel limit switch, the machine slow down, but it won’t stop until it reach the machine limit, why?

A: Please check the diagnose, the bit3 of X0, if it change from 0 to 1, means the deceleration signal is working, the same you can check the X9 and X10 signal of diagnose, if they are not changed, means the zero return signal is not working.