WELDTECH WT200MP - Basic MIG Welding Setup; Wire Spool Fitting and Loading; Wire Feed Tension Adjustment

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WT200MP Welding Machine
www.weldtech.net.nz
Basic Operation - MIG Welding
1. Fitting Wire Spool
1.1 Openthewirefeedercompartmentdoor.Remove
thewirespoolholder(18)bythreadingitanticlock-
wise.Ifusing5kg/D.200spool,checkthatthe5kg
spoolspacersleeveisttedtothespoolholder.Fit
the wire spool to spool holder, ensuring that the
wire exits the spool towards the wire feeder from
bottom the spool.
1.2 To replace the spool holder, set the spool brake
tension by adjusting the spool tension adjust-
ment hex screw in the middle of the spool holder.
Clockwise to increase spool brake tension and an-
ti-clockwise to decrease. The spool brake tension
should be set so that the spool can rotate freely,
but does not continue to rotate once the wire feed
stops. This may need to be adjusted as the wire is
used up and the spool weight decreases.
WARNING!
Excessive spool brake tension will cause wire feeding
issues and aect welding performance as well as
premature failure/ wear of wire feed components.
Insucient brake tension will cause the spool to
‘freewheel’ and the welding wire will unravel from
the spool (known as a ‘birds nest’)
1.3 Feed the wire from the spool through the wire
driveinletguide(19)intothewirefeeder.
2. Loading Wire Feeder
2.1 Release the wire feed tension arm (21) by pivot-
ingthewirefeedtensionadjustmentlever(20)to-
wards you from the vertical ‘locked’ position.
2.2 Checkthewiredriveroller(23)groovematchesthe
selectedMIGwiretypeandsize.Thedriverollerwill
have two dierent sized grooves; the size of the
groove in use is stamped on the side of the drive
roller.Foruxcored‘soft’wire,suchasthatusedin
gaslessMIGwelding,thedriverollergroovehasa
serratedprole(knownasknurled).Forsolidcore
‘hard’MIGwire,thedriverollergrooveusedhasa
‘v’ shaped prole. For Aluminum solid core‘soft’
MIGwire,thedriverollerrequiredhasa‘u’shaped
groove. If necessary, remove and change the drive
rollerbyunthreadingthedriverollerretainer(22).
 Once the correct drive roller (23) isselected and
tted and the driveroller retainer (22) issecured
in place, manually feed the wire through the wire
drive inlet guide (19), through the drive roller
groove and into the outlet wire guide tube. En-
suring that the wire is correctly seated in the drive
roller groove, replace the wire feed tension arm
(21)andlockitintoplacebypivotingthewirefeed
tensionadjustmentlever(20)backtothevertical
position.
2.3 Adjusting wire feed tension. This is accomplished
by winding the knob on the tension adjustment
lever (20). Clockwise will increase tension, anti-
clockwise will decrease drive tension. Ideal tension
is as little as possible, while maintaining a consist-
ent wire feed with no drive roller slippage.
2.4 Check all other causes of excess wire feeding fric-
tioncausingslippagerst,suchas;incorrect/worn
drive roller, worn/ damaged torch consumables,
blocked/ damaged torchwire guide liner, before
increasing wire feed tension. There is a number
scaleonthetensionadjustmentlever(20)toindi-
cate the adjustment position. The higher the num-
ber indicated, the higher the tension that is set.
WARNING!
Before changing the feed roller or wire spool, ensure
that the mains power is switched o.
WARNING!
The use of excessive feed tension will cause rapid
and premature wear of the drive roller, the support
bearing and the drive motor/ gearbox.
2.5 ConnecttheMIGTorchEuroConnectortotheMIG
torchEuro connection socket (1) on the front of
themachine.Securebyrmlyhandtighteningthe
threadedcollarontheMIGTorchconnectorclock-
wise.
2.6 Check that the correct matchingMIG wire, drive
roller(23)andMIGtorchtiparetted.
2.7 Connect the machine to suitable mains power us-
ing the mains input power lead (16). Switch the
mains power switch (17) to‘on’to power up the
machine.Settheweldingmodeswitch(6)to‘MIG’
position.
2.8 You are now ready to feed the wire through the
torch. With the wire feeder cover open, pull the
triggeroftheMIGtorchtocheckthatthewireis
feeding smoothly through the feeder and into the
torch.
2.9 Setthewirefeedingspeedknob(9)tomaximum.
With the torch tip removed from the torch and the
torchlaidoutasstraightaspossible,depressMIG
torch trigger until the wire feeds out through the