Hypertherm HT200LHF-200 Volt HySpeed - Manual (Page 84)

OPERATION
HySpeed HT2000LHF
Instruction Manual
4-31
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 4-7
1. Remove the 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 double the recommended depth of a standard copper electrode.
Use the electrode gauge assembly supplied in the spare 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 spare 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 the 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 cotton swab to remove dirt,
grease, etc. A preferred method to clean the current ring is with a clean paper towel or cotton swab 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.
CHANGING CONSUMABLE PARTS
WARNING
Always disconnect power to the power supply before inspecting or changing torch consumable
parts.
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