Standoff And Cut Quality - ESAB ESP-101 Manuel D'instruction

SECTIoN 4
4.4

Standoff and Cut Quality

Standoff (Arc Voltage) has a direct influence on cut quality and squareness. It is recommended that prior to
cutting, that all cutting parameters are set to the manufacturer's suggested conditions. Refer to the Operation
section Process Data in the torch manual for recommendations. A sample cut should be made using actual part
material followed by close examination of the part.
If the cut face of the part has excessive bevel or rounded top edge, it may be that the standoff is set too high.
When standoff is controlled by an arc voltage height control, reducing the arc voltage setting will reduce the
standoff.
Lower the standoff until the excessive bevel or rounded top edge disappears. Note that on material thicknesses
of 1/4" (6.4 mm) or greater, a standoff too close may result in a negative cut angle.
STANDOFF
LAG LINES
figure 4-4. Cut Quality
ARC
VOLTAGE
PoSITIVE (+) CuT aNglE
Bottom dimension "B" is
greater than dimension "A"
NEgaTIVE (-) CuT aNglE
Bottom dimension "B" is less
than dimension "A"
35
oPEraTIoN
a
B
a
B
figure 4-5. Cut angle