Scenario

One or more axes travel at a high rate of speed, uncontrollably under any of the following circumstances:

• When the user tries to jog the machine
• When a file runs
• When the cnc interface is started

Problem

There is likely no feedback from the motor, or the feedback is backwards.

Solution

• Immediately press the emergency stop on the machine.
• Ensure feedback in setup for all axes, starting with the one(s) that "ran away"

If there is no feedback on only one axis:

• Inspect the rectangular cable that plugs into the motor and control board.
• If this machine is NOT an LC/LP controller, inspect the scsi cable
• Swap the motor cables with another motor at the control board
• Swap the motor with another similar motor
• Contact Support with these results.

If there is no feedback on any axes:

• If this machine is NOT an LC/LP controller, inspect the scsi cable
• Contact Support with these results.

If there is feedback on all of the axes, including the one that "ran away"

• This is an unusual circumstance that can only arise from a replaced encoder or amplifier that was not wired properly. Verify this is the case and Contact Support with this information.