Common cutting faults -18, Common cutting faults – Hypertherm HT4001 Plasma Arc Cutting System User Manual
Page 109
OPERATION
15
5-18
HT4001
Instruction Manual
Common Cutting Faults
• Torch pilot arc will initiate, but will not transfer. Causes can be:
1. Work cable connection on cutting table not making good contact.
2. Malfunction in HT4001 system. See Troubleshooting in Maintenance section.
• Workpiece is not totally penetrated, and there is excessive sparking on top of the workpiece. Causes
can be:
1. Current is set too low (check Cut Chart information).
2. Cut speed is too high (check Cut Chart information).
3. Torch parts are worn (see Changing Consumable Parts).
4. Metal being cut is too thick.
• Dross forms on the bottom of the cut – See Dross on page 5-16.
• Cut angle not square – See How to Optimize Cut Quality on page 5-15.
• Short consumable life – See Maximize the Life of Consumable Parts on page 5-15.
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