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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


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


  • 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:

If there is no feedback on any axes:

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.