8
2.4.2 POWER SOURCE
The Power Source consists of an inverter dc power
supply for single-phase 208 V or 230 V primary con-
nection.
2.4.3 WIRE FEEDER
The wire feeder is built into the Power Source cabinet,
housed separately from the electrical components.
Cooling air is not drawn through the wire feeder mecha-
nism, thus reducing its exposure to dirt and dust.
The wire feeder pushes wire at speeds up to 655 ipm
(inches per minute). The purge/inch switch mounted
inside the Power Source cabinet allows the operator to
advance the wire without activating the torch.
2.4.4 MT-200cc TORCH
This air-cooled welding gun is supplied complete and
ready to weld with 0.035 inch steel wire. The torch
accommodates 0.045 inch wire by changing the con-
tact tip.
2.4.5 CONTROLS
The Migmaster 300i can be used to weld hard, alumi-
num, and flux cored wire . Control of the Power Source
and its different applications is provided by the 2-line,
32-character display screen. The operator selects the
process desired by scrolling through the menu selec-
tions. A detailed description of the Power Source con-
trols is included in Section III of this manual.
2.4.6 RUNNING GEAR
The Migmaster 300i is equipped with a running gear
with swiveled front wheels and a gas cylinder support.
The rear wheels are packed loose for shipping and are
easily installed, as described in paragraph 4.2.
Table 2-2. Contact Tips and Liners
Table 2-3. Guide Tubes and Feed Rolls
Wire
Size & Type
Standard Duty Contact Tips*
Liners
Short
Medium
Long
10’
12"
15’
Hard Wires &
Cored Wires
.023" (.6mm)
--
20543
999742
999743**
--
--
.030" (.8mm)
--
20544
996994
948850
17717
--
.035"(.9mm)
--
996995
996996
2075237
17718
2075238
.045"(1.2mm)
--
996999
996998
2075237
17718
2075238
.052"(1.4mm)
948340
2075349
--
2075239
17719
2075240
1/16"(1.6mm)
948341
996997
--
2075239
17719
2075240
Soft Wires
(aluminum)
.035"(.9mm)
--
996995
996996
948862
--
--
3/64"
999578
996999
996998
948863
--
--
Wire
Size & Type
Guide
Tube
Feed
Roll
Hard Wires -
"V" Groove
.023"(.6mm)
21163
21155
.030"(.8mm)
21164
21155
.035"(.9mm)
21165
21156
.045"(1.2mm)
21165
21156
Cored Wires -
Serrated
.030"(.8mm)
21164
21160
.035"(.9mm)
21165
21160
.045"(1.2mm)
21165
21161
.052"(1.4mm)
21166
21161
1/16"(1.6mm)
21166
21161
Soft Wires
(aluminum)-
"U" Groove
.035"(.9mm)
21167*
21158
3/64"(1.2mm)
21168*
21158
Short contact tips are generally recommended to give proper wire stick out for flux cored wire welding.
Medium contact tips are generally recommended to give proper wire stick out for spray arc Mig welding.
Long contact tips are generally recommended to give good visibility and proper wire stick out for short
arc Mig welding.
**Requires support liner for .023" wire. Order P/N 999797.
2.5 OPTIONAL EQUIPMENT
A. Mig 41A Push/Pull MIG Torch Assembly; includes
liner, contact tip, feed roll, and nozzle.
15 ft, .035" soft wire ............................... 604417
25 ft, 3/64" soft wire ............................... 604578
B. Mig 41A Push/Pull Basic MIG Torch; does not
include liner, feed roll, or contact tip; order sepa-
rately (see Form F-7036).
15 ft Basic ................................................ 20506
25 ft Basic ................................................ 20536
C. HW-17V (w/valve) Heliarc TIG Torch; 60° head,
12-1/2 ft; use with adapter and gas hose noted
below and TIG weld without disconnecting the MIG
torch; attach HW-17V to the adapter and run gas
hose directly to shielding gas regulator/flowmeter.
16X48
D. TIG Torch Adapter; used to attach standard
Heliarc Torch to Migmaster 300i cvcc ............
................................................................. 21223
E. Gas Hose; 12-1/2 ft, includes fittings ..................
................................................................. 40V77
F. HW-17cc Heliarc TIG Torch; 60° head, 12-1/2 ft.
16X48cc
Torch plugs into same front panel connector as the
MT-200cc; convert from MIG to TIG quickly and
have gas control through the Power Source. In-
cludes body, handle, long cap, cable, and cc
connector.
