Hypertherm HT2000, Instruction Manual

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HySpeed HT2000
Instruction Manual
6-37
OPERATION
22
Changing Consumable Parts
Check the consumable parts daily for wear before cutting. Before removing parts, bring the torch to the edge
of the machine, with the lifter raised to its highest point. This prevents the danger of dropping the
consumables into the water of the water table.
Removal and Inspection –
Refer to Figure 6-7
1. Remove
Retaining cap
and
Shield
by unscrewing the retaining cap by hand.
2. Check the shield for external signs of wear. It 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.
3. Unscrew and remove the shield from the retaining cap. Inspect the gas holes from the inside. The holes
should be clear of metal or other debris. (Debris can cause arcing.)
4. Inspect the two O-rings on the
Torch body
. They should be lubricated and undamaged. If they are dry,
lubricate them lightly with a very thin film of the lubricant provided in the consumable parts kit. If they are
damaged, replace them.
5. Using the 3/4" side of the wrench supplied with the consumable parts kit, remove the
Nozzle
. Inspect it for
damage or signs of wear. You can clean the inside of the nozzle with steel wool, but be sure to remove
any remnants of the steel wool afterward. The hole in the nozzle should not be worn or oval-shaped.
6. Using the 3/8" center hole in the wrench, remove the
Electrode
and inspect it. If the center of an all copper
electrode has a pit more than .044" (1.1 mm) deep, replace it. A SilverPlus electrode should be replaced
when the pit depth exceeds approximately two times the recommended depth of an all copper electrode.
Use the electrode gauge assembly supplied in the consumable parts kit to measure pit depth. If the
electrode is still good, inspect its O-ring: it should be lubricated and undamaged. If it is dry, lubricate it
lightly with a very thin film of lubricant provided in the consumable parts kit. If it is damaged, replace it.
7. Remove the
Swirl ring
from the electrode and inspect it. It should be clean, and the holes on the top and
sides should not be plugged. Inspect its O-ring. It should be lubricated and undamaged. If it is dry,
lubricate it lightly with a very thin film of lubricant provided in the consumable parts kit. If it is damaged,
replace it.
8. Inspect the inside of the
Torch body
by using a mirror, or by looking carefully inside. The
Current ring
inside of the torch body should be clean and undamaged. Use a clean paper towel or Q-tip to remove dirt,
grease, etc. A preferred method to clean the current ring is with a clean paper towel or Q-tip dipped in
water or 3% hydrogen peroxide.
If the
Water tube
is damaged at all, it may need to be replaced. See
Changing the Water Tube
.
WARNING
Always disconnect power to the power supply before inspecting or changing torch consumable
parts.