Signs that a cartridge is near end-of-life

There are various indicators that denote when a cartridge is near the end-of-life.

Usually, the best indication of when to install a new cartridge is when the cut quality is no longer satisfactory. When it is necessary to replace a cartridge, replace the full cartridge with a new one. Do not try to disassemble the cartridge.

Figure 1. Cartridge components
This image shows a cartridge next to a torch with callouts.
1 Retaining cap
2 Nozzle hole (circular)
3 Shield
The following signs can be indications that a cartridge is near or at end-of-life:
  • Examine the nozzle hole. A nozzle hole in good condition is circular. If the nozzle hole is not circular, replace the cartridge.
  • Look for a higher rate of Torch Stuck Open (TSO) or Torch Stuck Closed (TSC) errors. As a cartridge wears, unwanted material can collect inside the cartridge and cause TSO and TSC faults to occur. Refer to Troubleshooting for TSO and TSC faults. In some conditions, you can remove this material by carefully shaking the cartridge.

  • Examine the crown. The crown is the square copper piece inside of the cartridge. Push down the crown and then release the spring tension.

    This image shows the location of the crown.

    A crown in good condition goes back to its start position. If the crown stays in the down position, carefully shake the cartridge. If the crown continues to stay in the down position, replace the cartridge.

Note:

If you do a lot of piercing, it is possible to see black marks on the retaining cap. Usually this is not a sign that the cartridge is at end-of-life. Continue to cut with the cartridge until the cut quality is no longer satisfactory.