R-Tech C-MIG 315 Operation Instructions Manual page 11

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Side panel
Burnback adjustment – This sets amount of time welding power stays on after torch button released
and wire feed has stopped. If too little Burnback is set, wire may stick to work after trigger released,
if too much Burnback is set wire will Burnback into welding tip.
Wire reel holder – remove retainer screw cap and fit wire reel and refit securing screw cap. The reel
holder features an internal adjustable breaking system so that reel of wire stops quickly when torch
trigger released, other wise wire reel would continue for a few seconds causing wire to come of
sides of reel and cause tangle (birds nest)
Wire feed assy – make sure rollers are correct size for wire diameter selected, to change rollers
release retaining knurled head screw fit rollers onto shafts making sure the right size groove is in
line with wire and refit retaining screws. Do not over tighten wire feed pressure rollers as this can
cause premature motor and roller failure. TIP: Correct way to adjust tensioners is to slacken off
pressure so that 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 Burnback into tips, if you have too much pressure
wire can snag in rollers when wire hits work and cause wire tangle by rollers.
Welding operation
Once you have set machine up as per above instructions press the torch trigger to start welding,
gas will flow from torch and main welding power will start and wire feed will start and once wire has
touched workpiece welding will start, to stop welding release torch trigger.
Adjust wire feed speed to give desired weld characteristics –
Less wire = Dip transfer welding
More wire = Spray transfer welding
TIP: Inside wire feed lid is chart with approximate recommended welding power settings required
for various sizes of material. Chart also shown below