Section 5 − Operation; Controls; Cutting Speed - Miller Electric Spectrum 125C Owner's Manual

5-1. Controls

1
1 Power Switch
2 Power Light
Use light to tell if unit is energized and ready
to operate. Light goes off if input power is not
with specified range (see trouble light infor-
mation).

5-2. Cutting Speed

Recommended production cutting speed vs. material thickness is approxi-
mately 10 ipm at 1/8 in (3.2 mm) mild steel thickness at max setting.
SECTION 5 − OPERATION
OFF
ON
3
3 Trouble Light
Trouble light comes on for the following
conditions:
a If cup is removed from torch (unit
power must be turned off and back
on again)
2
POWER
CUP
TEMP
INPUT VOLTAGE
b
c
If unit overheats
If input power is not within
specification [93 to 137 vac (non-
CE models), 186 to 274 vac (CE
models)]. If input power is outside of
specified range, cycle power by
placing the power switch in the off
position and back on again. Check
input power if problem continues.
The cutting speed curve shows the
recommended maximum cutting
speed capabilities of the power
source and torch for mild steel of
various thickness.
The best cut quality is achieved by
cutting near the chart line. Cutting
below the line (too slow) will result
in excess dross. Cutting above the
line (too fast) will cause blowback
and lack of penetration.
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