17
SECTION 2 INTRODUCTION
Depending on the primary input voltage of the MM-250, and
the torch length, each package includes the following:
- One (1), Migmaster 250 Power Supply/Wire Feeder equipped with
a dual-groove feed roll (for .035/.045 wire), a 6'-0" ft. primary input
power cable and plug (plug is installed for 208/230-V. units only), a
mating input power receptacle rated @ 50A./250-V. (packed loose
for 208/230-V. input packages only), 10-ft. work cable w/clamp, a
6'-0" shielding gas supply hose w/ttings and running gear w/gas
(cylinder) support, as follows:
-- Migmaster 250 for 208/230-Volt input ........................P/N 32851
-- Migmaster 250 for 208/230/380/400/460/575-Volt
input ........................................................................................P/N 32852
- One (1), Migmaster 250 Kit as follows:
-- 12-ft. Pkg.
Includes:
GUNMASTER 250, ready-to-weld, 12-ft. lg. torch
for .035/.045 wire .......................................................................P/N 21116
R-33-FM-580 Regulator, (F-15-173) ......................................P/N 21557
Mig Welding Process Handbook ........................................ P/N 791F18
10 # Sample Spool Wire .035 87 HP Wire
-- 15-ft. Pkg.
Includes same accessories as 12-ft. Kit except for torch,
which is:
GUNMASTER 250, 15-ft. lg. for .035/.045 wire, .................P/N 21117
CO
2
Kits are the same as 12-ft. Pkg. except Regulator is R-33-FM-320.
P/N 21558.
2.3.2 POWER SUPPLY
The power supply consists of a tapped single phase trans-
former, tap selection switches, secondary contactor, single
phase full wave rectier, stabilizing reactor, slope resistor,
ltering capacitors and internal output connections for
polarity reversal.
2.3.3 WIRE FEEDER
The wire feeder pushes 0.023, 0.030, 0.035 and 0.045 in.
wire at speeds up to 650 IPM. Dynamic braking prevents
excessive wire overrun. A double grooved drive roll (0.035
and 0.045 in. - supplied) provides a convenient means of
changing the setup for either wire size.
The wire feeder is built into the power supply cabinet, and
is housed in a compartment separated from the welding
machine components. Machine ventilation is not drawn
through this compartment, thus helping to keep the wire
and feeding mechanism clean.
2.1 GENERAL
This manual has been prepared especially for use in famil-
iarizing personnel with the design, installation, operation,
maintenance, and troubleshooting of this equipment.
All information presented here in should be given care-
ful consideration to assure optimum performance of this
equipment.
2.2 RECEIVING-HANDLING
Prior to installing this equipment, clean all packing material
from around the unit and carefully inspect for any damage
that may have occurred during shipment. Any claims for loss
or damage that may have occurred in transit must be led
by the purchaser with the carrier. A copy of the bill of lading
and freight bill will be furnished by the carrier on request if
occasion to le claim arises.
When requesting information concerning this equipment,
it is essential that Part, Serial and Model Numbers of the
equipment be supplied.
2.3 DESCRIPTION
The Migmaster 250 is a portable Welding System designed
for ne wire, (0.023, 0.030, 0.035 and 0.045 in.) welding us-
ing the short arc method, as well as for spray arc aluminum,
short arc and spray arc stainless steel and spray arc cored
wires. It incorporates a running gear with provisions for one
gas cylinder, and a ST-23A spool-on-gun control.
2.3.1 AVAILABLE PACKAGES AND CONTENTS
The following Migmaster 250 Packages are available with
Argon Regulator:
MM-250 for 208/230-V.
Input w/12-ft. Pkg. ......................................................... P/N 604560
MM-250 for 208/230-V.
Input w/15-ft. Pkg. ......................................................... P/N 604561
MM-250 for 208/230/380/400/460/575-V.
Input w/12-ft. Pkg. ......................................................... P/N 604563
MM-250 for 208/230/380/400/460/575-V.
Input w/15-ft. Pkg. ......................................................... P/N 604570
The following Migmaster 250 packages are available with CO
2
Regulator:
MM-250 for 208/230-V
Input w/12-ft. Pkg. ............................................................P/N 35678
MM-250 for 208/230/380/400/460/575-V
Input w/12 ft. Pkg. ............................................................P/N 35763
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