Control Panels And Adjustments; Wire Feed Speed Potentiometer (R1); Burn Back Time - Kemppi Kempoweld Wire 550 Operating Instructions Manual

Parts of gas flow regulator
A Gas bottle valve
B Press regulation screw
C Connecting nut
D Hose spindle
The following installing instructions are valid for most of the gas flow
regulator types:
1. Step aside and open the bottle valve (A) for a while to blow out
possible impurities from the bottle valve.
2. Turn the press regulation screw (B) of the regulator until no spring
pressure can be felt.
3. Close needle valve, if there is one in the regulator.
4. Install the regulator on bottle valve and tighten connecting nut (C) with a wrench.
5. Install hose spindle (D) and jacket nut (E) into gas hose and tighten with hose clamp.
6. Connect the hose with the regulator and the other end with the wire feed unit. Tighten the jacket nut.
7. Open bottle valve slowly. Gas bottle pressure meter (F) shows the bottle pressure. Note! Do not use the
whole contents of the bottle. The bottle should be filled when the bottle pressure is 2 bar.
8. Open needle valve if there is one in the regulator.
9. Turn regulation screw (B) until hose pressure meter (G) shows the required flow (or pressure). When regulating
flow amount, the power source should be in switched on and the gun switch pressed simultaniously.
Close bottle valve after having finished welding. If the machine will be out of use for a long time, unscrew the
pressure regulation screw.

6. CONTROL PANELS AND ADJUSTMENTS

6.1. WIRE FEED SPEED POTENTIOMETER (R1)

The wire feed speed is adjusted steplessly with the potentiometer on the front panel, see the paragraph PANELS.
The potentiometer has the memory scale for max. speeds of 18 m/min and 25 m/min.

6.2. BURN BACK TIME

Different filler materials and shielding gases behave in different ways in the welding end, so that you should switch
off the welding current with a delay, which is suitable for wire feed stopping according to the welding case.
If you try to end welding with an unsuitable burn back time, the wire will burn in the contact tip, there will be too
big drop at the wire end, or the wire will stick at the ending point.
Factors influencing on the delay:
1 3 4 2
Wire inch
5. The wire inch starts the wire feed motor and mechanism, but not the power source.
The filler wire can be driven to the feeder unit, gun and interconnection cable also with the welding gun´s
switch, but then also the power source will get started and the wire becomes live (gets voltage), and this can
cause a danger situation by accidental contact to dangerous objects!
10 – KEMPOWELD WIRE 400, 550 / 0530
E Jacket nut
F Gas bottle pressure meter
G Gas hose pressure meter
1. Melting of aluminium is much quicker than by the other material, so
that the burn back time is clearly shorter.
2. Steel and especially filler wires require longer time than the stainless
materials.
3. Thicker filler wires require longer time. Also by increase of wire feed
speed the required time should be longer. In the instructions label are
given points for starting with different materials. The fine-adjustment
should be carried out according to each case in question.
4. Memory scale for potentiometer.
5
A C F
G
B
E
D
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