Manual 0-2470 35 OPERATION
4.06 OPERATING THE SYSTEM (continued)
Dross
(continued)
High speed dross usually forms a narrow bead along the bottom
of the cut edge and is very difficult to remove. When cutting a
troublesome steel, it is sometimes useful to reduce the cutting
speed to produce slow speed dross. Any resultant cleanup can be
accomplished by scraping, not grinding.
Table 4-C Common Causes of Operating Problems
Problem
Insufficient
Penetration
Main Arc
Extinguishes
Excessive
Dross Formation
Short Torch
Parts Life
Possible Cause
1. Cutting speed too fast
2. Torch tilted too much
3. Metal too thick
4. Worn torch parts
5. Cutting current too low
1. Cutting speed too slow
2. Torch standoff too high from workpiece
3. AC line too low - reduce output current
4. Work cable disconnected
5. Worn torch parts
1. Cutting speed too slow (bottom dross) Easily removed
2. Cutting speed too fast (bottom dross) Tight bead, Difficult to remove
3. Torch standoff too high from workpiece (top dross) Easily removed
4. Worn torch parts
5. Improper cutting current
1. Oil or moisture in air source
2. Exceeding system capability (material too thick)
3. Excessive pilot arc time
4. Air flow too low (incorrect pressure)
5. Improperly assembled torch
Common Cutting Faults
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