Maintenance
XPR300 Instruction Manual 809480 251
In general, if the electrode pit depth exceeds the guidelines below, replace the electrode and nozzle.
* Based on your cut-quality requirements, it can be necessary to replace your electrode at a pit depth that is
shallower or deeper than the guidelines above.
For information about how to measure electrode pit depth, refer to How to
measure the pit depth of an electrode on page 252.
If you see a non-symmetrical, rough-edged pit and rough-surfaced electrode face (Figure 62),
replace the electrode and nozzle.
Figure 62 – Non-symmetrical, rough-edged pit and rough-surfaced electrode face
If an electrode needs replacement because of emitter wear, always
replace the nozzle at the same time as the electrode.
Electrode
amperage
Replacement pit
depth*
Description
< 130 A ≥ 1 mm (0.04 in) In general, for electrodes less than 130 A, replace the electrode
when the pit depth is 1 mm (0.04 in) or greater.
≥130A and
<220A
≥ 1.25 mm (0.05 in) In general, for electrodes greater than or equal to 130 A and less
than 220 A, replace the electrode when the pit depth is 1.25 mm
(0.05 in) or greater.
≥ 220 A ≥ 1.5 mm (0.06 in) In general, for electrodes greater than or equal to 220 A, replace the
electrode when the pit depth is 1.5 mm (0.06 in) or greater.
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