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SECTION 3
3.4 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 PCM-50i, refer to the maintenance
section of this manual. If the problem is not corrected
after referring to the maintenance section, contact your
representative.
A.
Insufficient Penetration.
1.
Cutting speed too fast.
2.
Damaged cutting nozzle.
3.
Improper air pressure.
B.
Main Arc Extinguishes.
Cutting speed too slow.
C.
Dross Formation. (In some materials and thick-
nesses, it may be impossible to get dross-free
cuts.)
1.
Cutting speed too fast or too slow.
2.
Improper air pressure.
3.
Faulty nozzle or electrode.
1
TO START A PIERCE, TILT THE
TORCH TO PREVENT MOLTEN MA-
TERIAL FROM COMING BACK
AGAINST AND DAMAGING THE
TORCH.
Figure 3-4. Piercing Technique using the PT-27
2
WHEN THE ARC BREAKS
THROUGH THE WORK, BRING
THE TORCH TO AN UPRIGHT
POSITION AND PROCEED TO
CUT.
D.
Double Arcing. (Damaged Nozzle Orifice.)
1.
Low air pressure.
2.
Damaged cutting nozzle.
3.
Loose cutting nozzle.
4.
Heavy spatter.
E.
Uneven Arc.
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 condi-
tion.
G.
Main Arc Does Not Strike.
Loose connections.
H.
Poor Consumable Life.
1.
Improper gas pressure.
2.
Contaminated air supply.
OPERATION
13
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