Cable For Mma Welding And Return Current Cable; The Welding Torch; Electrodes To Be Welded; Tig Dc Welding - Kemppi MASTERTIG AC/DC 2000 Operation Instructions Manual

2.5. CABLE FOR MMA WELDING AND RETURN
CURRENT CABLE
The welding cables have to be at least 16 mm
mm copper cables for Mastertig AC/DC 2500, Mastertig AC/DC 2500W and 50 mm
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cables for Mastertig AC/DC 3500W. Thinner cables will cause voltage losses and heating.
Connect the grounding clamp of the return cable carefully, preferably directly to the piece to be
welded. Use as short welding cables as possible. Unnecessarily long cables will lower the maxi-
mum output voltage of the machine. Coiling of the excess cable lowers the output voltage of the
machine especially in AC welding and decreases the ignition spark.
Clean the fastening surface of any paint and rust!
2.6.

THE WELDING TORCH

In Mastertig AC/DC 2000 and Masterig AC/DC 2500, only an gas-cooled torch can be used.
In Mastertig AC/DC 2500 W and -3500W, you can use either an gas-cooled or a water-cooled
torch. Make sure that the torch you are using is designed for the maximum welding current that
you need.
Never use a damaged torch!
2.7.

ELECTRODES TO BE WELDED

With the Mastertig AC/DC power sources you can use all electrodes designed for DC or AC
welding within the current limits of the machine in question.
Mastertig AC/DC 2500, -2500W and -3500W power sources are suitable for carbon arc gouging
and cutting according to their maximum power.
Reference max electrode diameters and yield
electrode type
Fe-rutile
Fe-base
Fe-high-yield
Ss-rutile
Ss-base
Ss-high-yield
Hard facing by welding
2.8.

TIG DC WELDING

DC– current is used typically when welding different kind of steel. We rekommend for DC–
welding a WC20 (grey) elctrode.

2.8.1. Sharpening of the electrode

The tip of the electrode is sharpened into a cone, so that the arc becomes steady and the thermal
energy is concentrated on the spot being welded. The length of the sharpening to the diameter
of the electrode:
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COPYRIGHT KEMPPI OY
copper cables for Mastertig AC/DC 2000 and 25
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yield 2000 2500, 2500W
95 % ø 4 ø 5
100 % ø 4 ø 5
180 % ø 2,5 ø 4
250-270 % - - - ø 4
- - - ø 4 ø 6
- - - ø 4 ø 6
150 % ø 3,25 ø 5
100 % ø 3,25 ø 5
Mastertig AC/DC 2000, 2500, 2500W, 3500W/0510 – 9
3500W
ø 6
ø 6
ø 5
ø 5
ø 6
ø 6
ø 6
ø 6
with small current sharp l = 3 x d
with large current blunt l = 1 x d
copper
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