Electrode Angle
The angle that the electrode makes with the work is important to ensure a smooth, even transfer of
metal. When welding in down hand, fillet, horizontal or overhead the angle of the electrode is
generally between 5and 15 degrees towards the direction of travel. When vertical up welding the
angle of the electrode should be between 80 and 90 degrees to the work piece.
Travel Speed
The electrode should be moved along in the direction of the joint being welded at a speed that will
give the size of run required. At the same time, the electrode is fed downwards to keep the correct
arc length at all times. Excessive travel speeds lead to poor fusion, lack of penetration etc, while
too slow a rate of travel will frequently lead to arc instability,slag inclusions and poor mechanical
properties.
Material and Joint Preparation
The material to be welded should be clean and free of any moisture, paint, oil, grease, mill scale,
rust or any other material that will hinder the arc and contaminate the weld material. Joint
preparation will depend on the method used include sawing, punching, shearing, machining,
flame cutting and others. In all casesedges should be clean and free of any contaminates. The
type of joint will be determined by the chosen application.
3.3 Installation & Operation for TIG Welding
3.3.1 Set up installation for TIG Welding
(1) Insert the earth cable plug into the positive socket on the front of the machine and tighten it.
(2) Plug the welding torch into the negative socket on the front panel, and tighten it.
(3) Connect the control cable of torch switch to 9 pin socket on the front of the machine .
(4) Connect the gas line of TIG Gun to outlet gas connector on the front of the machine .
Check
for Leaks!
(5) Connect the gas regulator to the Gas Cylinder and connect the gas line to the Gas Regulator.
Check for Leaks!
(6) Connect the gas line to the machine inlet gas connector via the quick push lock connector
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