Lincoln Electric IM761 POWER FEED 15M - Manual (Page 23)

B-9 OPERATION B-9
P OSTFLOW
The Postflow setting adjusts the amount of time the
shielding gas flows after the trigger is released and
welding current is turned off. Postflow times can be
adjusted from 0 to 10.0 seconds in 0.1 second incre-
ments.
To adjust the Postflow time, toggle the SELECT toggle
switch until the LED next to PREFLOW/POSTFLOW is
lit. Then toggle the SELECT toggle switch once more
until the display reads:
The present Postflow time will be displayed. Toggle the
SET toggle switch up or down to change the Postflow
time to a new value.
Run In
The Run In function sets the wire feed speed from the
time when the trigger is pulled until the time an arc is
established. The Run In speed is independent of the
welding or start wire feed speed.
To change the Run In speed, toggle the SELECT tog-
gle switch until the LED next to Run In is lit. The display
will show the present Run In speed. Toggle the SET
toggle switch up and down to change the Run In speed
to a new value. Do not use the left Knob,WIRE FEED
SPEED Knob. The WIRE FEED SPEED Knob adjusts
welding wire feed speed, not Run In wire feed speed.
Run In speed is adjustable from 50 to 150 ipm (1.27 to
3.81 m/min).
The default value for Run In is OFF (Run In wire feed
speed = Welding wire feed speed.)
Start
The Start function sets the wire feed speed and voltage
at the beginning of the weld for a specified time period
prior to initiation of the preset values for WFS and
Volts. The start timer begins at arc strike and the WFS
and Volts settings will ramp up/down from the start
WFS and Volts values to the Weld mode WFS and
Volts values over the time selected.
To change the Start function values, toggle the
SELECT toggle switch until the LED next to START is
flashing. Rotate the WIRE FEED SPEED Knob to
adjust the Start WFS and rotate the VOLTAGE / TRIM
KNOB to adjust the Start Volts / Trim. Change the Start
time by toggling the SET toggle switch up and down to
a new value.
The Start time is adjustable from 0 to 0.50 seconds in
0.01 second increments.
The default Start time is OFF (0 seconds)
Arc Control
Arc Control is a generic control that allows fine tuning
the waveform. The function of Arc Control depends
on the active weld process.
To change the Arc Control values, toggle the
SELECT toggle switch until the LED next to ARC
CONTROL is flashing. Then use the SET toggle
switch to raise or lower the arc control setting to the
new value.
The Arc Control value ranges from -10.0 to 10.0 in
increments of 0.1, with "OFF" being the midpoint,
equivalent to 0.0.
POWER FEED 15M
P o S F L o
Weld Process
CV
GMAW-Pulse
GMAW-STT
Power
Arc Control Function
Arc Control regulates the pinch effect for
synergic and nonsynergic GMAW and
FCAW weld programs. A low Arc Control
value gives a soft arc best for welding with
Argon blend shielding gases. A high Arc
Control value gives a crisp arc suitable for
welding with FCAW and CO
2
shielding
gases. Most self shielded electrodes work
well with Arc Control value "5".
Arc Control regulates the pulse frequency.
Lower the Arc Control value for a lower
pulse frequency, and raise the Arc Control
value for a higher frequency.
Arc Control regulates the background cur-
rent of the STT waveform.
Arc Control regulates pinch.