Welding Positions; Preparing The Joint; Ground Clamp Connection - Würth TIG 200S AC/DC Traducción Del Manual De Instrucciones De Servicio Original

2.7 Description for using TIG torch with
amperage control and foot pedal
control:
Firstly, preset max output current on the front panel
of machine which user will welding, e.g. 100A. The
digital will show 100A preset current; Secondly, user
can only adjust max welding current on TIG torch or
foot pedal during welding. However, output amper­
age range will be limited to preset amperage on
welder, that means the output amperage range is
max amperage to 100A.
NOTE: if there is no other adjustment after presetting
current 4s or 5s, digital will show real current.
3. Stick welding skill

3.1 Welding positions

There are two basic positions, for welding: Flat and
Horizontal. Flat welding is generally easier, faster,
and allows better weld fusion. If possible, the work
piece should be positioned so that the bead will run
on a flat surface.

3.2 Preparing the Joint

Before welding, ensure that the surface of work
piece is free of dirt, rust, lime scale, oil or paint. Oth­
erwise, it will create brittle and porous weld. If the
base metal pieces to be joined are thick or heavy, it
may be necessary to bevel the edges with an angle
grinder. The correct groove angle should be around
60 degrees.
Please see the following picture:
Based on different welding position, there are dif­
ferent welding joints. Please observe the following
images for more explanation:

3.3 Ground clamp connection

Clear any dirt, rust, lime scale, oil or paint residues
on the ground clamp. Make certain you have a
good solid ground connection. A poor connection of
the ground clamp will waste power and heat.
Make sure the ground clamp touches the metal.
3.4 Electrode
The welding electrode is a rod coated with a layer of
flux. When welding, electrical current flows between
the electrode (rod) and the grounded metal (work­
piece). The intense heat of the arc between the rod
and the grounded metal melts the electrode and the
flux.
3.5 Selecting the proper electrode
There is no golden rule to determine the exact elec­
trode or heat setting required for every particular sit­
uation. The type and thickness of metal and the posi­
tion of the workpiece rule the electrode type and
the amount of heat needed during welding process.
Heavier and thicker metals require more amperage.
It is best to practice your welds on scrap metal which
matches the metal you intend to work with, in order
to define correct heat setting as well as make appro­
priate electrode choice. Please observe some follow­
ing helpful troubleshooting tips to determine if you
are using a correct electrode.
26