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4.1 I
NSUFFICIENT PENETRATION
This problem may be caused by:
•
High speed:
Always mak
e sure that the arc fully penetrates the work-
piece, and is never angled
15°. This will avoid incorrect consumption of the nozzle
and burns on the gas nozzle holder.
•
Workpiece too thick
diagram).
•
Mass clip not in good electrical contact with the
workpiece.
•
Worn nozzle and electrode.
•
Nozzle hole too large for the cu
knob D.
•
Cutting current too low.
NOTE: When the arc does ot penetrate, scraps of
metal may damage the nozzle
4.2 THE CUTTING ARC GOES OUT
T
his problem may
be caused by:
•
Worn nozzle, el
ectrode or diffuser.
•
Air pressure too high.
•
Supply voltage too low.
•
Adv
ancement speed too low.
•
Cutting current too high for the thickness of the
workpiece.
4.3 SLANTED CUT
If
the cut is slanted, shut off the machine and replace
nozzle.
P
revent the nozzle from coming into electrical contact
with the workpiece (including
metal).
This will cause rapid at times instantaneous destruction of
the nozzle hole, leading to very po
4.4 EXCESSIVE WE
AR ON CONSUMER PARTS
This problem may be caused by:
•
gas pressure too low compared to the recommended
value.
•
gas supply circuit damaged.
5 HELPFUL HINTS
• If the system air contains a considerable amount o
m
oisture and oil, it is best to use a drying filter to avoid
e
xcessive oxidation and wear of the consumer parts,
d
amaging the torch and reducing the cutting speed and
q
uality.
• T
he impurities in the air may make it difficult to light the pilot
arc. If this occurs, clean the end portion of the electrode and
the interior of the nozzle using very fine-grained sandpaper.
forward by more than 10° -
(see cutting speed/thickness
rrent value set on the
n
molten
hole.
via scraps of molten
or quality cutting.
the
f
9
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