Miller Electric Welder - Manual (Page 97)

OM-196 188 Page 91
The teach mode allows the user to create
custom pulse MIG welding programs. The
teach mode has 15 teach points. At each
teach point, the user can adjust five
parameters: peak amperage (Apk), back-
ground amperage (Abk), pulses per second
(PPS), pulse width in milliseconds (PWms),
and peak voltage (Vpk) to shape the pulse
waveform of the weld output.
Wire feed speed teach points can range from
the minimum to the maximum wire feed
speed of the feeder. When using a standard
speed motor, wire feed speed teach points
typically range from 50 to 750 ipm. The feed-
er uses pulse parameters at teach points to
establish the pulse parameters at any wire
feed speed setting.
Below the wire feed speed of the lowest
teach point, and above the wire feed speed
of the highest teach point, the unit may limit
wire feed speed settings in pulse MIG to
maintain all pulse parameters within the
capability of the unit.
Pulse MIG programs made by the
manufacturer have pulse waveform
information entered for all 15 teach points.
The operator can relocate and modify the
setting of one, or any number of the 15 teach
points if the factory set information is not
appropriate for a specific application.
After the parameters for each teach point are
established, an arc must be struck and main-
tained for at least 5 seconds in teach mode.
This allows the wire feeder to learn the arc
voltage length associated with the taught
pulse parameters. To ensure a proper arc
length reading, electrode stick-out must be
carefully maintained. An alternate method is
to adjust the Vpk value, then turn off Teach
Mode and weld. If welding is performed with
Teach Mode on, Vpk will be updated for other
parameter settings.
The taught arc length represents a Trim (arc
length) setting of 50. Increasing the value of
Trim, increases the actual arc length. Like-
wise, decreasing the value of Trim will
decrease actual arc length.
In the Pulse mode, the unit does not maintain
a constant arc length with variations in elec-
trode stick-out. In the Adaptive Pulse mode,
the unit adjusts pulse frequency to maintain
a constant arc length regardless of varia-
tions in electrode stick-out.
Proceed to next section to teach a pulse MIG
program.
150 180 210 240 270 300 330 360 370 420 450 480 510 540 565 Apk
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Abk
30 55 80 105 130 160 185 210 235 260 290 315 340 365 400 PPS
1 3 5 PWms 2 4
780
750
700
650
600
550
500
450
400
350
300
250
200
150
100
50
Apk
Abk
PPS
PWms
IPM
10-2. Teach Points Explained
Example Of A Synergic
Setting For 425 IPM With
All Teach Points Set At
50 IPM Increments
2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30 32.5 35 37.5 Vpk
Vpk