Troubleshooting for a ramp-down error

Diagnostic code 620

Diagnostic code 620 shows that there is a ramp-down error.

Symptoms

Code Symptoms XPR® models XPR action Code cancels with...
620
The chopper duty cycle is more than the programmed limit. A ramp-down error can be the cause:
  • During a ramp-down error, the arc distance between the torch and the workpiece increases quickly.
  • Ramp-down errors can decrease consumable life.
  • The plasma cutting system can sense and react to ramp-down errors. This helps to increase the life of consumable parts. Refer to Automatic ramp-down error protection.
 All models Ramp down
  • Start
  • Set process
  • Remote on-off

Corrective action

  1. Make sure to use correct cutting techniques:
    • Use a workpiece that is large enough for the selected parts or nesting program.
    • Use the correct parts or nesting program.

      Ramp-down errors can occur when you cut across large kerfs or cut at incorrect heights.

    • Stop every cut with the plasma arc still attached to the workpiece.
    • Decrease the cut speed when the end of the cut is near.
    • Stop the plasma arc before the part is completely cut, or let the cut complete during ramp down.
    • Program the path of the torch into the scrap area for ramp down.