Wire Spool Fitment & Polarity Change (Gasless wire)
1. Wire reel tensioner
. Remove item 4 and adjust bolt inside to adjust tension on wire
feed reel, if too loose when trigger is released and wire feed motor stops, the reel will
continue to spin and cause wire to bird nest off the reel. To tight adjustment will cause
premature motor failure. It should just have slight tension when turned by hand.
2. Roller tensioner.
This sets the pressure of rollers, be careful not over tighten wire feed
pressure roller as this can cause premature motor and roller failure. Correct way to
adjust tensioner is to slacken off pressure so that MIG welding wire does not feed,
slowly adjust pressure until wire feeds smoothly, you should be able to stop wire
feeding by holding wire and it should slip on rollers. If you have too little pressure
wire will slip when welding causing unwanted Burn back into tips or erratic weld
beads size.
3. Wire Feed Drive Assembly.
Make sure rollers are correct size for wire diameter
selected, to change roller size release retaining screw, remove roller turn roller
around and slide onto shaft making sure the right size groove is in line with wire and
refit retaining screw. The Pro-MIG250 comes fitted with a dual roller 0.6mm+0.8mm
& 0.8mm+1.0mm
4. Wire reel retainer.
Remove the wire reel retainer and wire reel adaptor, slide on roll of
wire and refit the reel adaptor.
5.
Internal – negative connector.
When using gasless wire, move internal (inside wire
feed cabinet) cable to this connector – This then makes the torch negative, you would
then connect Workpiece earth lead to + positive connector on front of machine (fig
2.1)
6.
In positive connector.
When using normal welding wire (not gasless), move
internal (inside wire feed cabinet) cable to this connector, This then makes the torch
positive, you would then connect Workpiece earth lead to - negative connector on
front of machine (fig 2.2)
