Kemppi Protig 501L - Manual (Page 14)

14 – PROMIG 501, PROMIG 511/0537 © KEMPPI OY
41
2.6. 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.
2.7. ADJUSTMENT OF TIGHTNESS OF REEL BRAKE
Brake force is adjusted through hole in locking
device of reel hub by screwing the control screw (41)
with screwdriver.
Adjust brake force as so big that the wire is not allowed to become too loose on the reel so that
it would spill from the reel when the rotation of the reel stops. Need for brake force is increased
with increase of wire feed speed.
Since the brake loads for its part the motor, you shouldn’t keep it unnecessarily tight.
2.8. BURN BACK TIME
Electronics of feed unit controls stopping of welding automatically so that the wire end does not
melt fastened to the contact tip or the work piece. Automatics work regardless of the wire feed
speed.
2.9. GROUND CABLE
Fasten earthing press of ground cable carefully, preferably direct to welding piece. Contact
surface of press always should be as large as possible.
Clean the fastening surface from paint and rust!
Use in your MIG equipment at least 70 mm
2 . Thinner cross-sectional areas might cause
overheating of connectors and insulations.
Make sure that the welding gun in your use is designed for max. welding current needed!
Never use a damaged welding gun!