WELDTECH WT200MP, Operating Instructions Manual

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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 fitted 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 affect welding performance as well as
premature failure/ wear of wire feed components.
Insufficient 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 different sized grooves; the size of the
groove in use is stamped on the side of the drive
roller. For flux cored ‘soft’ wire, such as that used in
gasless MIG welding, the drive roller groove has a
serrated profile (known as knurled). For solid core
‘hard’ MIG wire, the drive roller groove used has a
‘v’ shaped profile. 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
fitted 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 first, 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 off.
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 firmly 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 fitted.
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