ESAB Powercut 875, Instruction Manual

Page: 83 / 228

83
sEctIoN 4 opEratIoN
figure 4-5. piercing technique using the pt-32Eh
a. Insufficient penetration.
1. Current too low.
2. Cutting speed too fast.
3. Damaged cutting nozzle.
4. Improper air pressure.
5. Low air flow rate.
B. Main arc Extinguishes.
1. Cutting speed too slow.
2. Worn electrode.
c. Dross formation. (In some materials and thick-
nesses, it may be impossible to get dross-free
cuts.)
1. Current too low.
2. Cutting speed too fast or too slow.
3. Improper air pressure.
4. Faulty nozzle or electrode.
5. Low air flow rate.
D. Double arcing. (Damaged Nozzle Orifice.)
1. Low air pressure.
2. Damaged cutting nozzle.
WHEN THE ARC BREAKS
THROUGH THE WORK, BRING
THE TORCH TO AN UPRIGHT PO-
SITION AND PROCEED TO CUT.
TO START A PIERCE, TILT THE TORCH TO
PREVENT MOLTEN MATERIAL FROM COM-
ING BACK AGAINST AND DAMAGING
THE TORCH.
1
2
4.4 coMMoN cuttINg proBlEMs
Listed below are common cutting problems followed by the probable cause of each. If problems are determined to be
caused by the Powercut 875, refer to the maintenance section of this manual. If the problem is not corrected after referring
to the maintenance section, contact your ESAB distributor.
3. Loose cutting nozzle.
4. Heavy spatter accumulation on nozzle.
E. uneven arc.
1. Damaged cutting nozzle or worn electrode.
f. unstable cutting conditions.
1. Incorrect cutting speed.
2. Loose cable or hose connections.
3. Electrode and/or cutting nozzle in poor condition.
g. Main arc Does Not strike.
1. Worn electrode.
2. Loose connections.
3. Worn cable not attached.
h. poor consumable life.
1. Improper gas pressure.
2. Contaminated air supply.
3. Low air flow rate.