WIA CP144-1, Operator'S Manual

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Weldmatic 350 & 500 | Operator Manual | Model No CP144-2/CP145-2
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Before removing the equipment
cover, ENSURE that the equipment
is disconnected from the mains
power supply. When the equipment
is energised LETHAL VOLTAGES
are present on the electrical
components enclosed.
Dust
Care should be taken to prevent excessive
build-up of dust and dirt within the welding
power source. It is recommended that
at regular intervals, according to the
prevailing conditions, the equipment
covers be removed and any accumulated
dust be removed by the use of a dry, low
pressure compressed air, or a vacuum
cleaner. The machine should be blown
out with compressed air at least every 12
months as grinding dust can settle on PCB
componentry causing failure. Failure to
maintain machines may void warranty.
Wirefeed
In order to obtain the most satisfactory
welding results from the GMAW process,
the wirefeed must be smooth and constant.
Most causes of erratic wirefeed can be cured
by basic maintenance. Check that the:
1 Feed rolls are the correct size and type
for the wire in use. Check also that the
drive groove is aligned with the wire,
and that the groove is not worn;
2 Gun cable liner is clear of dust and
swarf build-up. When replacement
becomes necessary, fit only the correct
liner. The build-up of dust can be
minimised by regular purging of the
liner with dry compressed air. This may
be conveniently done each time the
wire spool is replaced;
3 Welding tip is free of obstructions
such as spatter build-up. Ream out
the tip bore with a suitable size oxy-tip
cleaner. Replace the welding tip as it
becomes worn;
4 Feed roll pressure is not excessive.
The pressure should be just sufficient
to feed the wire evenly. Excessive
pressure will deform the electrode wire
and make feeding more difficult;
5 Consumable wire spool holder rotates
smoothly and that the braking action is
not excessive. The spool should only
have sufficient braking to prevent over
run when the motor stops. This also
may be conveniently checked each
time the wire is replenished;
7 Welding wire is straight and free
of buckles or ‘waviness’. To check,
remove 2 or 3 metres of wire from
the spool. Clamp one end in a vice
or similar, then holding the other end
pull the wire out straight. Look down
the length of the wire, any buckles will
be obvious. Buckled wire is extremely
difficult to feed reliably and should be
replaced;
8 Welding wire is free of surface rust.
Replace if rust is evident.
8 GENERAL MAINTENANCE