ESAB ESP-101 Instruction Manual download pdf (Page 41)

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bp15da4

Standoff Arc voltage

Lag lines

Figure 4-4. Cut quality

Positive (+) cut angle A

Bottom dimension “B is greater than

dimension “A”

Negative (-) cut angle A

Bottom dimension “B is less than

dimension “A”

Figure 4-5. Cut angle

7.5 Dross formation

Cutting speed, gas selection and variations in metal composition contribute to dross

formation. The correct cutting standoff also has an influence on dross formation. If

the arc voltage is set too high, the cut angle becomes positive. In addition, dross

forms on the bottom edge of the part. This dross can be very tenacious and require

chipping and grinding for removal. Setting the cutting voltage too low results in

undercutting the parts or negative cut angle. Dross formation occurs but in most

cases it is easily removed.

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ESAB ESP-101 Instruction Manual Page 41