ESAB A6 TFD1 Manual Del Operador página 44

INSTALLATION
Twin wire
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Always use the D35 contact tube for twin wire, with a guide tube and separ-
ate wire straightener.
Fit the clamp for the guide tube to the M12 hole normally used for the
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fixed straightening roller on the standard wire straightener. The guide
tube should bottom against the contact jaw (Heavy Twin) or against the
adapter for the contact tip (Light Twin).
Trim the length so that there is about a 5 mm gap between the wire feed
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roller and the end of the tube.
Twin wire 2x1.2 - - 2x2.0 mm, Light Twin:
Use (2) contact tips with M6 threads. For wire diameters see table on page
69.
Tighten the contact tips well to ensure good electrical contact.
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Fit the M5 adapter for the M6 contact tips in the fixed half of the split
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contact tube. The pressure screw and the loose half of the contact tube
are not necessary for this application.
Twin wire 2x2.0 - - 2x3.0 mm, Heavy Twin:
Use Twin contact jaws for large diameter wires
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(2x2,0 mm, see also Light Twin).
Fit the contact jaws using the M5 bolts supplied for the purpose.
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NOTE! Fit the contact jaw half with the projection in the fixed section of
the contact tube.
Remove the loose half of the contact tube when installing new wire by
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undoing the pressure screw.
Feed out the wire and guide it through the groove in the fixed half of the
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contact jaws (projection).
Unscrew the M5 bolt for the contact jaw and fit the loose half using an
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M8 allen bolt, so that the half of the contact jaw with the projection and
the opposing half surround the wires. The loose section of the contact
tube is then bolted in place using the M5 bolts to provide good contact.
Adjustment of wires for Twinarc welding:
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Adjust the wires in the joint to give the optimum weld results by twisting the
contact tube. The wires can be rotated so that they are in line with the joint or
at any angle up to 90_ to the joint, i.e., one wire each side of the joint.
Tandem welding
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The distance between the first wire and the second must not be so large
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that the slag solidifies before the following wire reaches it.
Make sure there is a good covering of flux between the first and second
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wire.
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