Summary - ESAB B Series Installation, Operation And Maintenance Manual

SECTION 5

5.5 SUMMARY.

Arc voltage is not an independent variable. It is depen-
dent upon cutting amperage, nozzle size, torch standoff,
cut gas flow rate and cutting speed. An increase in arc
voltage can result from a decrease in cutting speed, an
increase in cutting amperage, a decrease in nozzle size,
TOP DROSS
Splatter appears on the top edge of both
pieces of the plate. Lower the voltage in
increments 5 V dc (maximum ) until top
dross disappears.
Figure 5-7. Top Dross
HIGH SPEED DROSS
Fine roll over dross that welds to
bot tom of edge. Cleaning requires
chipping or grinding.
Figure 5-8. High Speed Dross
LOW SPEED DROSS
Globular dross that forms in large
deposits. Comes off very easily.
Figure 5-9. Low Speed Dross
an increase in gas flow, an increase in cut water flow or an
increase in torch standoff. Assuming that all of the
variables are set to the manufacturer's settings, torch
standoff becomes the most influential variable to the
process. Good and accurate height control is a necessity
in producing excellent cut quality.
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CUTTING QUALITY