4-6
O
PERATION
Operator Manual
OPERATING TIPS
Changing Consumable Parts
Changing the consumable parts requires no tools:
1. Shut off the power supply.
2. Unscrew the retaining cap and the remaining parts will come apart easily. When you unscrew
the retaining cap, you will hear a click. This click is a microswitch (cap-on sensor switch) that
disables the power supply if it is plugged in.
3. Check the shield (if applicable) for external signs of wear. The shield should be clean and clear
of metal debris. The gas holes along the edge of the shield should not be blocked with debris.
The center hole should not have any nicks or gouges, and should show no signs of arcing
activity.
4. Unscrew the shield. Inspect the gas holes from the inside. The holes should be clear of metal
debris. If the gas holes are blocked by debris, try to open them by pushing a pin through each
one from the outside of the shield to the inside. If the shield is still good, screw it back on to the
retaining cap. If it is damaged, replace it with a new one.
5. Inspect the nozzle for damage or wear. If the hole in the nozzle is worn or oval-shaped, replace
the nozzle.
6. Inspect the electrode. If the center of the electrode has a pit more than 1/16 inch (1.6 mm)
deep, replace it.
7. Inspect the swirl ring. It should be clean, and the holes along the side should not be plugged. If
the swirl ring is damaged, replace it with a new one.
8. Inspect the O-ring on the torch. It should be lubricated and undamaged. If it is dry, lubricate it
with a thin film of the lubricant provided in the consumable parts kit. If it is damaged, replace it.
9. Replace the parts as shown in Fig. 4-5. Each part fits in only one direction, so you cannot put
the parts in backwards. Also, the torch will not fire if the parts are improperly assembled.
10. When the nozzle, electrode and swirl ring are properly in place, replace the retaining cap and
shield (or deflector). When the retaining cap is tightened, the microswitch will click, indicating
that the torch is again ready for operation. Plug the power supply back in.
WARNING
SHOCK HAZARD: Always turn off power and unplug cord from wall before changing
consumable parts. If power supply is directly connected to a line disconnect switch, place line
disconnect switch in OFF position. Do not rely on the cap-on sensor switch to remove power.
It is provided strictly for safety backup.
In the U.S., use a "lock-out / tag-out" procedure until the service or maintenance work is
complete. In other countries, follow appropriate national or local safety procedures.
Summary of Contents for powermax900
Page 1: ......
Page 15: ...SAFETY 1 6 Hypertherm Plasma Systems 8 99 ...
Page 21: ...SÉCURITÉ 1a 6 08 99 HYPERTHERM Systèmes plasma ...
Page 50: ...OPERATION 4 9 Operator Manual Figure 4 8 Dragging the Torch Figure 4 7 Cutting a Circle ...
Page 69: ...Operator Manual 5 14 MAINTENANCE PARTS ...
Page 73: ...APPENDIX B Operator Manual ...
