Strata ADVANCEMULTI205P Operating Instructions Manual page 15

T ravel Speed - Tra vel speed is the rate that
the gun is moved along the weld joint and is
usually measured in mm per minute. Travel
speeds can vary depending on conditions
and the welders skil l and is limi ted to the
welder s abil ity to control the weld pool. Push
technique all ows faster travel speeds than
Drag technique. Gas flow must also
correspond wit h the travel speed,
increasing wit h faster travel speed and
decreasing wit h slower speed. Travel speed
needs to match the amperage and wil l
decrease as the material thickness and
amperage increase.
15
ADVANCEMULTI205P
Normal stick out
Even arc, good
penetration even
fusion, good finish.
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Too short
Unstable arc, spatter,
over heat contact tip.
Too Fast Travel Speed
travel speed produces too little heat per
mm 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.
Too Fast Travel Speed
high narrow bead
undercut
lack of fusion
Too long
Unstable arc, poor
spatter, and
penetration
fusion.
- A too fast
porosity
spatter
lack of joint penetration