Automatic Wire Feed To Gun; Adjustment Of Tightness Of Wire Reel Brake - Kemppi KempoMat 2500 Operation Instructions Manual

3.6. AUTOMATIC WIRE FEED TO GUN

Automatic wire feed makes change of wire reel more rapid. In reel change the pressure of feed
rolls need not to be released and filler wire goes automatically to correct wire line.
- Make sure that groove of feed roll matches the diameter of welding wire used. Feed roll
groove is selected by moving the groove selecting washer.
- Release the wire end from reel and cut off the bent length. Be careful that the wire does
not spill from the reel to sides!
- Straighten about 20 cm of the wire and see that the end of it has no sharp edges (file
off if necessary).
A sharp edge may damage the wire guide tube and contact tip of the welding gun.
- Draw a bit of loose wire from wire reel. Feed wire through back liner to feed rolls.
Don´t release pressure of feed rolls!
- Press the gun switch and feed a bit wire until wire goes through feed rolls to gun. See
that wire is in grooves of both feed roll pairs!
- Press still the gun switch until wire has come through contact tip.
Automatic feed may sometimes fail with thin wires (Fe, Ss: 0.6...0.8 mm, Al, Fc: 0.8...1.0 mm).
Then it might be possible that you must open feed rolls and feed wire manually through feed
rolls.
Adjustment of pressure
Adjust the pressure of feed rolls with the control screw (20) so that the wire is fed into the
wire guide tube evenly and allows a little braking when coming out from the contact tip without
slipping at the feed rolls.
Excessive pressure causes flattening of the filler wire and damage to the coating. It
also causes undue wear of the feed rolls as well as friction.

3.7. ADJUSTMENT OF TIGHTNESS OF WIRE REEL BRAKE

Brake force is adjusted through hole in locking device of reel hub by screwing the control
screw with screwdriver.
Adjust brake force as so big that the wire cannot spill from the reel when the rotation of the reel
stops. Need for brake force is increased with increase of the wire feed speed.
Since the brake loads for its part the motor, you shouldn´t keep it unnecessarily tight.
Make sure that the welding gun in your use is designed for max. welding current
needed by you! Never use a damaged welding gun!
10 / Kempomat 2500, Kempomat 3200, Kempomat 4000 / 0340
groove selecting washer
Adjustment screw
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