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© Weldclass 2020 | E.&O.E.
7.1.2
Loading Wire Feeder
1.
Set welding process to ‘MIG/MAG’
(Weldforce 175MST only)
2.
Release the Wire Feed Tension Arm by pivoting the Tension Lever towards you from the vertical
‘locked’ position.
3.
Remove Drive Roller Retaining Cap & Drive Roller
4.
Check the wire Drive Roller 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.
Weldforce 155M:
The serrated (knurled) groove side of the drive roller can be used for both
Gasless MIG welding and Solid steel MIG wire in either 0.8 or 0.9mm. The smooth ‘V’ groove side
is for 0.6mm solid steel wire.
Weldforce 175MST:
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 ‘hard’ MIG wire, the drive roller
groove used has a ‘V’ shaped profile. For Aluminum MIG wire, the drive roller required has a ‘U’
shaped groove.
5.
Fit correct drive roller & replace retaining cap
6.
Manually feed the wire through the Wire Inlet Guide, through the Drive Roller groove and into
the Wire Outlet Tube.
7.
Ensuring that the wire is correctly seated in the drive roller groove, replace the Wire Feed Tension
Arm and lock it into place by pivoting the Wire Feed Tension Lever back to the vertical position.
8.
Adjusting wire feed tension by winding the Tension Lever Knob. Clockwise will increase tension,
anticlockwise will decrease drive tension.
TIP!
Ideal tension is as little as possible, while maintaining a consistent wire feed with
no drive roller slippage.
Check all other causes of excess wire feeding friction causing slippage first, such as;
incorrect contact tip size, damaged contact tip, blocked/damaged torch wire guide
liner, incorrect/worn drive roller, before increasing wire feed tension.
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.
9.
Connect the MIG Torch to the MIG torch Euro Connector on the front of the machine
(Weldforce
175MST only)
. Secure by firmly hand tightening the threaded collar on the MIG Torch connector.
10.
Check that the correct matching MIG wire, drive roller and MIG torch tip are fitted.
11.
Connect the machine to suitable mains power using the mains input power lead. Switch the
mains power switch to ‘I’ (On) to power up the machine.
12.
You are now ready to feed the wire through the torch. With the wire feeder cover open, pull the
trigger on the MIG torch to check that the wire is feeding smoothly through the feeder and into
the torch.
13.
Remove the contact tip from the torch and lay the torch out as straight as possible.
14.
Pull the trigger on the torch until the wire feeds out through the end of the MIG torch.
15.
Replace the tip on the MIG torch and trim off any excess wire.
WARNING!
DO NOT touch the wire while it is feeding as it is electrically live and you
risk electrocution or injury.
