8785115
200A Multi-Process Welder with LCD Display
V4.0
34
For technical questions call 1-800-665-8685
TRAVEL ANGLE
Travel angle is the right to left angle relative to the direction of welding. A travel
angle of 5° to 15° is ideal and produces a good level of control over the weld
pool. A travel angle greater than 20° will give an unstable arc condition with
poor weld metal transfer, less penetration, high levels of spatter, poor gas shield
and poor quality finished weld.
ANGLE TO WORK
The work angle is the forward or back angle of the torch relative to the workpiece.
The correct work angle provides good bead shape, prevents undercut, uneven
penetration, poor gas shield and poor quality finished weld.
STICK OUT
Stick out is the length of the unmelted wire protruding from the end of the
contact tip.
A constant even stick out of 1/8 to 1/4 in. will produce a stable arc and an even
current flow providing good penetration and even fusion. A stick out that is too
short will cause an unstable weld pool, produce spatter and over heat the contact
tip. A stick out too long will cause an unstable arc, lack of penetration, lack of fusion
and increase spatter.
TRAVEL SPEED
Travel speed is the rate that the torch is moved along the weld joint and is usually
measured in mm per minute. Travel speeds can vary depending on conditions and
the welder’s skill and is limited to the welder’s ability to control the weld pool. Push
technique allows faster travel speeds than Drag technique. Gas flow must also
correspond with the travel speed, increasing with faster travel speed and decreasing
with slower speed. Travel speed needs to match the amperage and will decrease as
the material thickness and amperage increase.
TOO FAST TRAVEL SPEED
A too fast travel speed produces too little heat per inch of travel resulting in less
penetration and reduced weld fusion, the weld bead solidifies very quickly trapping
gases inside the weld metal causing porosity. Undercutting of the base metal can
also occur and an unfilled groove in the base metal is created when the travel speed
is too fast to allow molten metal to flow into the weld crater created by the arc heat.
