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2.1 GENERAL
This manual has been prepared for experienced welders. Do
NOT permit untrained persons to install, operate or maintain
this equipment. Do NOT attempt to install or operate this
equipment until you have read and fully understand these
instructions.
This manual is intended for use in familiarizing person nel with
the design and operation of this equipment. All information
presented here should be read careful ly before installing and
using this equipment.
2.2 RECEIVING-HANDLING
Upon receipt of this equipment, clean all packing material
from around the unit and immediately inspect for any dam-
age that may have occurred during shipment. Any claims
for loss or damage occurring in transit must be led with
the carrier. The carrier will furnish a copy of the bill of lading
and the freight bill on request, if the need to le a damage
claim arises.
When requesting information regarding this equipment,
make sure that you include product name, part num ber, and
serial number.
2.3 SAFETY
The safety section at the front of this manual should be read
completely before attempting to install and operate this
equipment. Both equipment and person nel hazards are
reduced if proper safety precautions are taken. If you are
unsure of yourself in any situa tion, ask your supervisor or
other experi enced person nel for help.
2.4.1 POWER SOURCE
The power source is a secondary chopper DC output designed
for single phase primary connec tions. An output controlled
fan provides proper cooling during normal welding opera-
tions and shuts o four minutes after welding stops. The fan
will automatically re-start when welding resumes and proper
machine temperatures will be maintained.
2.4.2 WIRE FEEDER
The four (4) roll drive wire feeder is built into the power source
cabinet, housed separately from the welding machine electri-
cal components. Cooling air is not drawn through the wire
feeder compartment or electronic controls reducing exposure
to dirt and dust which improves product performance and
reliability.
The wire feeder pushes wire at speeds from 65 to 675 ipm
(inches per minute).
2.4.3 CONTROLS
The Multimaster 300/300X can be used to weld solid and ux
cored wires. The operator selects the process desired on a
three position switch located on the front panel. A detailed
description of the power source controls is included in Section
4 (Operation) of this manual.
2.4.4 BUILT-IN TOOL BOX
The Multimaster 300/300X is designed with a lockable storage
space on the left side of the machine for welding accessories
such as contact tips, gas nozzles, small grinder, spare parts,
welding hood and protective clothing. (Figure 1B)
2.4.5 GUN MASTER 250 MIG GUN
This air-cooled welding gun is supplied complete and ready
to weld .045 / .052 in. Fluxcored wire. Other wire sizes can
be used. Refer to Table 6 in Section 6, for other wire size and
alloy accessories.
2.4.6 RUNNING GEAR
The Multimaster 300/300X is equipped with running gear with
swivel front wheels and a dual gas cylinder support.
Means immediate hazards which, if not
avoided, will result in immediate, serious
personal injury or loss of life.
Means potential hazards which could result
in personal injury or loss of life.
Means hazards which could result in minor
personal injury.
2.4 DESCRIPTION
The Multimaster 300/300X is a DC welding system designed
for Mig (GMAW), Tig (GTAW) or Stick (SMAW) welding. In the
Mig mode this unit is capable of operating with short arc or
spray arc transfer and handles both solid wires and tubular
cored wires. This unit is suitable for carbon steel, stainless steel,
aluminum and many other alloys. It provides a power source
with built in wire feeder and undercarriage with provisions
for two gas cylinders.
SECTION 2 DESCRIPTION
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