Quality
•
Reliability
•
Performance
Weldmatic 256
Model No CP124-3, Iss B 05/09
5
Quality
•
Reliability
•
Performance
1 Introduction
Gas Metal Arc Welding (G.M.A.W.) is an arc
welding process where a consumable wire is
fed by motor driven feed rolls to a welding
gun, and where welding current is supplied
from the welding power source. The welding
arc is struck between the work piece and
the end of the wire, which melts into the
weld pool. The arc and the weld pool are
both shielded by gas flow from the gun, or
in the case of “self shielded” wires, by gases
generated by the wire core.
The process is very versatile in that by
selection of the correct wire composition,
diameter and shielding gas, it can be used
for applications ranging from sheet-metal to
heavy plate, and metals ranging from carbon
steel to aluminium alloys.
The Weldmatic 256 has been designed to
be used with consumable wires in the range
from 0.6mm to 1.2mm diameter. The smaller
wire sizes are used when welding at lower
currents, such as sheet-metal applications.
Increasing the wire diameter permits higher
welding currents to be selected.
A common application of G.M.A.W. is for
welding Mild Steel. In this application, a
Mild Steel solid consumable wire such as
AUSTMIG ES6 is used with a shielding gas
of Carbon Dioxide, or Argon mixed with
Carbon Dioxide. Alternatively, Flux-cored
consumable wires are available in both gas
shielded, and ‘gasless’ self shielding types.
Stainless steel and Aluminium can be welded
with G.M.A.W. using the correct consumable
wire and shielding gas.
The Weldmatic 256 wirefeeder has been
designed to feed a range of hard, soft, and
flux-cored wires for the G.M.A.W. process.
A compact motor with integral gear box is
coupled to a four roll drive assembly forming
the basic component of the wirefeeder. The
motor is controlled by an electronic speed
control which provides speed regulation and
compensation for supply voltage variations.
2 Receiving
Check the equipment received against the
shipping invoice to make sure the shipment
is complete and undamaged. If any damage
has occurred in transit, please immediately
notify your supplier.
The CP124-3 package contains;
• Weldmatic 256 (480 V) Power source
CP124-4
• Weldmatic 256 Enclosed Wirefeeder
W60-0
• 8m interconnecting leads
• 3m Bernard gun and cable assembly
• 5m work lead
• Gas hose
• Argon/mixed gas regulator
• (This) Operating Manual CP124-41.
Summary of Contents for Weldmatic 256
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