Operation
XPR300 Instruction Manual 809480 235
Automatic rampdown error protection
LongLife technology requires a controlled stop of the current and gas pressure to preserve
electrode life for mild steel cut processes. A failure to complete the cut on the workpiece causes
most uncontrolled stops (rampdown errors). Failure to complete the cut on the workpiece causes
the arc to stretch and then snap out in a rampdown error, which can drastically decrease
consumable life. Common causes for a rampdown error are:
Incorrect hole lead outs
Running off the edge of the workpiece
The cutting system can detect a rampdown error before the arc snaps out and can respond quickly
to do a controlled stop of the current and gas pressure. This can significantly increase the electrode
life, especially when cut speeds are less than 3,560 mm/min (140 in/min).
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