Multi-Process Panel Functions - Lincoln Electric 350MP Operator's Manual

B-5

MULTI-PROCESS PANEL FUNCTIONS

Weld Mode
Setting the Weld Mode is selecting the proper program
from the ones available in the machineʼs memory for a
particular welding application. The table on the right side
of the front panel (See Figure B.2) gives information on
the different programs available in this machine. It
describes the type of process (CV, CC, synergic
GMAW), type of metal (mild steel, stainless steel, alu-
minum), type of shielding gas and size of electrode rec-
ommended for a particular mode.
The Weld Mode selection is enabled by toggling the
SELECT switch until the LED next to Weld Mode is lit. A
Weld Mode number will be displayed on the display
meter. Toggling the SET switch up or down will increase
or decrease the WELD MODE number displayed. The
machine will change to the selected weld mode after two
seconds of SET switch inactivity. If the SELECT switch is
changed before two seconds of SET switch inactivity, the
machine will not change modes. The last active Weld
Mode will be saved at power down so that it will be
selected with the next power up of the machine.
Preflow / Postflow
• The Preflow setting allows a time to be selected for
shielding gas to flow after the trigger is pulled and prior
to wire feeding and establishing an arc.
• The Postflow setting allows a time to be selected for
shielding gas to continue to flow after the trigger is
released and output current is turned off.
• The Preflow timer will be selected by toggling the
SELECT switch until the LED next to PREFLOW
/POSTFLOW is lit. The display meter will read Pre. The
present Preflow time will be displayed and can be
changed by positioning the SET switch up or down.
• The Postflow timer will be selected by pressing down
the SELECT switch an additional time. The LED next
to PREFLOW / POSTFLOW will remain lit; but the dis-
play meter will now read Pos. The present Postflow
time will be displayed and can be changed by position-
ing the SET switch up or down.
• The default value for both Preflow and Postflow is
"OFF" (0 seconds).
• Preflow can be adjusted from 0 to 2.5 seconds in 0.1
second increments.
• Postflow can be adjusted from 0 to 10.0 seconds in 0.1
second increments.
OPERATION
Run-In
• The Run-In function offers the ability to set a wire feed speed,
from trigger until an arc is established, that is independent of
the Welding or Start wire feed speed. Setting a Run-In WFS
lower than the welding WFS avoids stubbing problems when
starting the arc.
• Run-In is selected by toggling the SELECT switch until the
LED next to RUN-IN is lit. A Run-In speed may be adjusted
using the SET switch on the Multi-Process Panel. The Display
meter on the Multi-Process Panel will indicate the run-in
speed. (Do not use the Output Control Knob on the upper
case front to adjust the Run-In speed. This will change
the welding WFS displayed in the meters on the upper
case front.)
• The default value for Run-In is "OFF."
• Run-In speed is adjustable from 50 ipm to 150 ipm (Inches
per Minute).
Start Procedure
This machine provides the option of setting a Starting
Procedure to start the weld, and from there, to ramp to the
welding procedure over a specified amount of time. Typically
starting on a higher starting procedure than the welding proce-
dure is known as a "Hot Start". Setting a starting procedure
lower than the welding procedure is known as a "Cold Start".
For SMAW (Stick) welding setting a "Hot Start" helps to mini-
mize stubbing the electrode.
For GTAW (TIG) welding setting a "Cold Start" minimizes burn-
through of thin materials when not using a manual amperage
control.
For Wire Feed welding using a start procedure can help
improve starting characteristics. A good example is when weld-
ing aluminum. Aluminumʼs high thermal conductivity results in
heat spreading around the plate very fast. Therefore more ener-
gy is necessary at the very beginning to heat up the starting
point of the weld. Once the welding begins, it is not necessary
to give this extra heat anymore so a ramp down to the welding
procedure is necessary.
To set a Start Procedure begin by using the SELECT switch to
select the Start LED. Using the SET switch, enter the desired
Start ramp time duration (its available values range from 0.01
seconds to 0.50 seconds in increments of 0.01 seconds or the
default value of OFF). This value will be displayed on the digital
meter of the multiprocess panel (See Figure B.2).
After setting the Start time also set the WFS, voltage/trim are
adjustable using the control knobs on the upper case front.
The way to know what information needs to be entered is to
look for flashing LEDʼs. If an LED is flashing that parameter
value needs to be entered.
POWER MIG ® 350MP
B-5