Parweld XTM353SW - Spot Weld Mode; Optimising Weld Parameters; Fault Finding

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correct eye, head, and body protecon.
1. Posion wire over joint. The end of the wire may
be lightly touching the work.
2. Lower welding helmet, operate gun trigger, and
begin welding. Hold the gun so the contact p to
work distance is about 3/8” (10 mm).
3. To stop welding, release the gun trigger and then
pull the gun away from the work aer the arc goes
out.
4. When no more welding is to be done, close valve
on gas cylinder (if used), momentarily operate gun
trigger to release gas pressure and turn o the
machine. 6.2 Opmising weld
parameters
NOTE These sengs are guidelines only. Material and
wire type, joint design, t up, posion, shielding gas,
etc. aect sengs. Produce test welds to be sure they
comply to specicaons.
Material thickness determines weld parameters.
1. Convert Material Thickness to Amperage (A)
(0.25mm= 1 Amp) 3.2mm = 125 A
2. Select Wire Size
Amperage Range Wire Size
40 - 145 A 0.8 mm
50 - 180 A 1.0 mm
75 - 250 A 1.2 mm
3. Select Wire Speed (Amperage)
Wire Size Feed speed
0.8 mm 0.05m/min per Amp
1.0 mm 0.04m/min per Amp
1.2 mm 0.025m/min per Amp
So based on 3.2 mm material thickness amperage
should be 125A if using 1.0mm wire then the wire
feed speed should be
0.04 X 125= 5m/min
Wire speed (amperage) controls weld penetraon
4. Select Voltage. Voltage controls height and width
of weld bead.
Low Voltage: wire stubs into work
High Voltage: arc is unstable (spaer)
Set voltage midway between high/low voltages.
And then ne tune accordingly
NOTE These sengs are guidelines only. Material and
wire type, joint design, t up, posion, shielding gas,
etc. aect sengs. Produce test welds to be sure they
comply to specicaons.
6.3 Addional welding controls
Burn back adjustment. when welding at high
amperages the wire can oen burn back onto or close
to the contact p to prevent this happening you can
increase the burn back control (18) located inside the
wire spool cover.
So Start. The so start control slows the acceleraon
of the wire feed motor as the act starts and so reduces
wire snubing and spaer at the weld start. This control
should be adjusted to give a smoother start to the
weld. (17).
Inductance seng XTM403SW only. This allows
2 levels of inductance to give the desired arc
characteriscs typically for low amperage with dip
transfer you should use the low inductance seng
as this speeds the burn o of the wire in dip transfer
mode. For higher amperages and spray transfer the
higher inductance seng is preferable.
7.0 Fault nding
Problem Cause/Correcve Acon
Porosity - small cavies or
holes
Resulng from gas
pockets in weld metal.
Inadequate shielding
gas coverage. Check for
proper gas ow rate.
Remove spaer from
gun nozzle.
Check gas hoses for
leaks.
Eliminate dras near
welding arc.
Place nozzle 6-13 mm
from work piece Hold
gun near bead at end of
weld unl molten metal
solidies.
Wrong gas. Use welding
grade shielding gas;
change to dierent gas.
Dirty welding wire. Use
clean, dry welding wire.
Eliminate pickup of oil
or lubricant on welding
wire from feeder or
liner.
Work piece dirty.
Remove all grease, oil,
moisture, rust, paint,
coangs, and dirt from
work surface before
welding. Use a more
highly deoxidizing
welding wire (contact
supplier).
Welding wire extends
too far out of nozzle.
Be sure welding wire
extends not more than
13 mm beyond nozzle.