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OM-186 165 Page 16
4-3. Calibrating Optional IPM Meter
Ref. ST-800 586-B / Ref. ST-176 180
Meter is factory calibrated, but may
need recalibration after motor
brushes are fully seated. To recali-
brate, proceed as follows:
1 CV/CC Switch
Set switch to CV.
2 Meter Board PC4
3 Resistor R53 Adjustment
Screw (High Range)
4 Resistor R54 Adjustment
Screw (Low Range)
Calibrate Low range wire speed
first.
5 Wire Speed Range Switch
6 Wire Speed Control
A Set range switch to Low,
and control to about 50%.
Turn wire feeder and weld-
ing power source On.
B Press trigger and feed wire
for 15 seconds. Measure
wire length, and multiply x
4 to get actual ipm. For ex-
ample: If 49 inches feeds in
15 sec, 49 x 4 = 196 actual
ipm.
C Press trigger again: Meter
reading should match ac-
tual ipm value, 196 in ex-
ample. If not, press trigger
and carefully adjust R54
until meter reads 196.
After Low range is calibrated, set
range switch to High. Leave control
at same setting (about 380 ipm).
Repeat procedure to calibrate High
range wire speed: About 95 inches
should feed in 15 sec, 95 x 4 = 380
ipm. If needed, adjust R53 so meter
reading matches actual ipm.
Turn off power. Close and latch
door.
0
15
A
Nonconductive
1
2
3
4
C
B
6
5