Process/Contactor Switch - Miller Trailblazer 302 Diesel Owner's Manual

6-3. Process/Contactor Switch

1 Process/Contactor Switch
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Weld output terminals are energized
when Process/Contactor switch is
in an Electrode Hot position and the
engine is running.
.
The unit will not return to idle speed
when Process/Contactor switch is in a
Wire position and the remote contactor
is on (closure between pins A and B on
remote receptacle).
Use switch to select weld process and weld
output on/off control (see table below and
Section 5-10).
Place switch in Remote positions to turn
weld output on and off with a device con-
nected to the remote receptacle.
Place switch in Electrode Hot positions for
weld output to be on whenever the engine
is running.
Wire Positions:
Use Wire positions for MIG welding using a
voltage sensing wire feeder (Electrode Hot)
or wire feeder using remote control.
Stick Positions:
Use Stick positions for stick (SMAW) and
air carbon arc (CAC-A) cutting and
gouging.
Stick Electrode Hot:
When switch is in a Stick Electrode Hot
mode, select one of four dig settings to pro-
vide additional amperage during short arc
length conditions and help prevent elec-
trodes from "sticking". See Stick position
OM-217 454 Page 28
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descriptions following (reading L to R):
Soft Arc (E 7018) - This setting provides a
low dig/arc force setting for smooth weld
performance. A stable weld puddle with
little arc "snap" gives excellent weld bead
appearance with minimal spatter.
Medium Soft Arc - This setting provides a
low to medium dig/arc force that gives a
slightly more fluid weld puddle, more arc
"snap", and reduces the potential for
electrode sticking at shorter arc lengths.
Medium Stiff Arc - This setting provides
medium dig/arc force for open root vertical
up joints or joints that do not require
additional current for fit up inconsistencies.
Stiff Arc (E6010) - This setting provides a
high dig/arc force for open root vertical
down joints where additional current is
needed to compensate for tight joint fit up
without the need to increase overall welding
current. This setting is recommended for
those who prefer a very stiff arc with 6010
electrodes.
Stick Remote On/Off:
When switch is in a Stick Remote On/Off
mode, select one of three settings to pro-
vide additional amperage during short arc
length conditions and help prevent elec-
trodes from "sticking". See Stick position
descriptions following (readingR to L):
Soft Arc (E7018) - This setting provides a
low to medium dig/arc force that gives a
slightly more fluid weld puddle, more arc
"snap", and reduces the potential for
electrode sticking at shorter arc lengths.
A complete Parts List is available at www.MillerWelds.com
Medium Arc - This setting provides me-
dium dig/arc force for open root vertical up
joints or joints that do not require additional
current for fit up inconsistencies.
Stiff Arc (E6010) - This setting provides a
high dig/arc force for open root vertical
down joints where additional current is
needed to compensate for tight joint fit up
without the need to increase overall welding
current. This setting is recommended for
those who prefer a very stiff arc with 6010
electrodes.
The dig circuit is disabled when switch is in
Wire or TIG positions.
TIG Positions:
TIG − Remote On/Off − Use this position for
AC or DC TIG welding using remote on/off
control.
Electrode Hot − Lift-Arc™ w/Auto Crater™
TIG (DC only) - With switch in this position,
a low voltage (10 V DC) is present between
the electrode and workpiece preventing
overheating, sticking, or contamination of
the electrode (see Section 6-5) as the arc is
struck.
End the arc using the Auto-Crater feature
(see Section 6-5).
Electrode Hot − Lift-Arc™ w/Auto Stop™
TIG (DC only) - With switch in this position,
a low voltage (10 V DC) is present between
the electrode and workpiece preventing
overheating, sticking, or contamination of
the electrode (see Section 6-5) as the arc is
struck.
End the arc using the Auto-Stop feature
(see Section 6-5).
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