ESAB Esp-1000 Plasmarc System Manual De Instrucciones página 307

section 5
5.4 troubleshooting Guide (con't.)
Problem
1. Reduced consumable
(electrode) life (O and N
2
cutting) - (cont)
Probable Cause
2
Height control problems.
Piercing standoff too low.
Starting on edges with
multi-pop starts.
Drawn arc from falling part.
Purity and dryness of gas.
Gas switching is not activat-
ing.
C. Greatly increasing the frequency of starts. This is
mainly a problem for O
by choosing a path with a minimum number of starts
or by bridging gaps in the skeleton with water plates.
D. Increased likelihood that the plate will spring up
against the nozzle causing a double arc. This can be
mitigated by careful operator attention and by increas-
ing standoff and reducing cutting speeds.
Since many of these problems are most severe with O
cutting consumables, consider when it may be practi-
cal to cut skeletons with N
A. When you will be changing to N
the next plate anyway.
B. When one plasma station on the machine is not
being used for part cutting and could be used for cut-
ting skeletons with N .
2
On machine with Oxweld or Purox torch, it may be
practical to use the gas torch for skeleton cutting.
See crashing / diving.
Increase piercing standoff.
Position torch more carefully or use a waster plate to
start on. This is most important for O
Change program.
Verify purity to be 99.55% O
purity of N to be 99.995%.
2
This pertains to O cutting only. Check to make sure
2
that switch is in Run 1 mode so that the arc begins in
N and switches to O . This may be checked by install-
2 2
ing the gas test flowmeter first on the N
flow control to see that N
and postflow only. Then install it on the O
the flow control to check that O
the cut. O should never flow when cutting with N
2
307
tRoUBLesHootinG
Remedy
cutting and can be alleviated
2
consumables:
2
consumables for
2
cutting.
2
. Verify dew point. Verify
2
line into the
2
is flowing during preflow
2
line into
2
is flowing only during
2
2
.
2