Figure 4-2. Sequence Of Plasma Arc Cutting (PAC)
CAUTION |
HITTING TORCH ON A HARD SURFACE to remove spatter can damage torch.
•Do not clean torch by hitting it against a hard surface.
•Hitting hard surfaces can damage torch parts and stop proper operation.
T IP AND EL ECT RO DE WEAR BEYO ND RECO MMENDED VAL UES or OPERAT IO N WITHOUT TIP OR ELECTRODE can damage torch.
•Inspect cup, tip, and electrode before cutting or whenever cutting speed has been significantly reduced.
•Do not operate torch without a tip or electrode in place.
•Use correct standoff distance.
•Do not cut with gouging tip.
Install & | Install | Put On Personal | Check Torch | Check Gas/Air | Set |
Connect | Gouging Tip | Safety | Tip, Electrode, | Pressure | Controls |
Equipment |
| Equipment | And Shield Cup |
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Turn On | Begin |
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Cutter | Gouging |
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EXAMPLE Of Gouging Operation |
| If cutting arc is not started within 5 seconds of pilot arc, pilot | ||
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| arc will go out. There is a | ||
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| arc can be restarted. | ||
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Use approx. 1/8 in (3 mm) | Press trigger. After 2 seconds of | Establish arc length of 1/2 to |
standoff distance at about | preflow, pilot arc starts. | (13 - 38 mm), and slowly |
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| start moving torch across metal. |
a 40 angle. |
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Adjust torch speed, arc length and angle as needed. | Release trigger. Postflow continues for approx. |
Direct sparks away from torch. Do not gouge too | 20 to 30 seconds. Gouging arc can be instantly |
deeply in one pass; make repeated passes if needed. | restarted during postflow by pressing trigger. |
