If it gives you no error code then it is not generating one. That likely means it is an unexpected error.
A switch can be the problem if you are moving or touching it when the problem occurs. If it is a somewhat consistent error then it is not as likely a switch. The limit switches and their wiring should give you an alarm, not an e-stop.
Check the voltage on the power supplies including the PC power supply. When the machine e-stops look in the back and see if there are any error code LEDs lit on the controller board and driver boards.
Dave |