Adjustment Of Pressure; Adjustment Of Tightness Of Reel Brake; Return Current Cable; Cooling Unit - Kemppi Kempoweld Wire 550 Operating Instructions Manual

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– 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, Fc, Ss: 0,6...0,8 mm, Al: 0,8...1,0 mm). Then it might be
possible that you must open feed rolls and feed wire manually through feed rolls.

5.6. 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.

5.7. ADJUSTMENT OF TIGHTNESS OF REEL BRAKE

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5.8. RETURN CURRENT CABLE

Fasten earthing press of return current 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 Kempoweld equipment copper cables. Too small cross-sectional area might cause overheating of
connectors and insulations. Make sure that the welding gun in your use is designed for max. welding current needed
by you! Never use a damaged welding gun!

5.9. COOLING UNIT

The cooling unit is built in the power source. All settings and operations needed for cooling are incorporated in
the power source. Read in the operation instructions the paragraph COOLING UNIT.

5.10. SHIELD GAS

Handle gas bottle with care. There is a risk for injury if gas bottle or bottle valve is damaged!
For welding stainless steels, mixed gases are normally used. Check that the gas bottle valve is suitable for the gas.
The flow rate is set according to the welding power used in the job. A suitable flow rate is normally 8 - 10 l/min.
If the gas flow is not suitable, the welded joint will be sporous. Contact your local Kemppi-dealer for choosing
gas and equipment.

5.10.1. Installing gas bottle

Always fasten gas bottle properly in vertical position in a special holder on the wall or on a carriage.
Remember to close gas bottle valve after having finished welding.
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– Make sure that groove of feed roll match the diameter of welding wire used.
Feed roll groove is selected by moving the groove selecting washer (28).
Also the selector plate for changing the feed roll groove has to be moved
similarly. (see table on page 4).
– 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!
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.
KEMPOWELD WIRE 400, 550 / 0530 – 9