B-4
OPERATION
INVERTEC V300-I
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NOTE: Code 9827, 10037 and 10132 (European) can
not operate an LN-9 GMA or LN-7 since these require
a 110 VAC auxiliary.
CONSTANT CURRENT PROCESSES
Manual Arc Welding (Stick)
The Invertec may be utilized as a manual DC arc
welder with the electrode cable, work cable, and elec-
trode holder being the only equipment required.
Air Carbon Arc Cutting
Air carbon arc cutting may be performed with the
Invertec within its output rating using 5/32" (3.9mm)
and 3/16" (4.7mm) diameter carbon rods. Output
cables, an air carbon arc electrode cable assembly,
and a source of compressed air are required.
NOTE:
1. Air carbon arc cutting may be performed using
either Constant Voltage modes or Constant
Current modes; however, the cutting action will be
smoother with Constant voltage modes. Best per-
formance will be at settings of 250 amps and
below.
2. The electrode protection circuit in the Invertec will
limit the current to approximately 325 amps.
TIG Welding
The Invertec which is capable of scratch TIG welding,
can be mated with the K900-1 DC TIG starter. An
electrode cable, work cable, TIG torch, and gas sup-
ply are required. Refer to Accessories section of this
manual.
METER POLARITY SWITCH. The switch is located
on the control panel at the rear of the machine. It pro-
vides a work-sensing connection (not the work lead)
for wire feeder voltmeters. As shown in Figure B.1a, if
the electrode polarity is negative (–), push the switch
to the left. If the electrode polarity is positive (+), push
the switch to the right. This switch does not change
welding polarity.
FIGURE B.1a
WELDING OPERATION
Familiarize yourself with the Controls and Display
Section before attempting operation of the V300-I.
If stick welding, TIG, or air carbon arc cutting is to be
done on the Invertec along with semiautomatic weld-
ing, then all control, electrode and work leads to the
wire feed equipment must be disconnected from the
Invertec before connecting the Invertec for stick, TIG
or air carbon arc cutting.
CONSTANT VOLTAGE PROCESSES
Gas Metal Arc Welding (GMAW)
GMAW welding may be performed with the Invertec
using the Lincoln Electric LN-9 GMA, LN-25 or LN-7
Wire Feeders. An appropriate GMAW gun and cable
assembly and a regulated supply of shielding gas are
required.
Innershield
®
/Outershield
®
(FCAW)
Semiautomatic flux-cored wire processes may be
done with the Invertec using the Lincoln Electric
LN-25 or LN-7 Wire Feeders. An appropriate gun and
cable assembly is required.
WARNING
12/95
