• All Files

Put a Jumper Wire in the X-Axis Limit Switch Box

ClosedOverview/Background Information

If you want background information on this problem, go to How Limit Switch Commands are Processed.

ClosedWhat Steps Have I Already Taken?

You've determined that:

  • The machine has an open limit switch circuit
  • The Machine Control Board is operating
  • The X Limit light is on

Follow the Troubleshooting Steps to determine the cause of the open limit switch circuit.

Before You Begin

If you haven't yet done so:

  • Locate the limit switch box on the X-axis limit switch.

Troubleshooting Steps

  1. Use a #1 Phillips screwdriver to remove the access cover from the limit switch box.

    WARNING! Electrocution Hazard: When servicing the machine from inside the electrical cabinet, always use caution. Points in the electrical cabinet have high voltages that can electrocute or shock you. Even after you've powered off the machine, electronic devices in the electrical cabinet may retain dangerous electrical voltages. Only qualified electrical machinery technicians should perform maintenance or troubleshooting procedures inside the electrical cabinet while power is still on.

  2. Put a jumper wire on the contacts of the X-axis limit switch. You can use any small length of wire as a jumper wire.

  3. From the PathPilot® interface, on the Status tab, locate the limit switch lights.

    4. Does the X Limit light go out with the jumper wire installed?

    • Yes: This means that the X-axis Limit Switch is defective and must be replaced. You may try to clean the limit switch using compressed air and WD-40® or similar and repeat the troubleshooting steps — go to Machine Won't Reference.
    • No: This means that the limit switch cable may be damaged. Tormach Technical Support for guidance on how to proceed.