S
ETTING
I
NTERNAL
F
UNCTIONS
W
ELDING
C
ONDITION
C
HAPTER
6
6-38
T I P S
• In short arc welding where short-circuiting and arc are repeated, most of spatter is generated
when short-circuit is caused and immediately before arc generation. In the latter timing
which is immediately before arc generation, a phenomenon called [Squeeze] shown in the
below figure occurs on the wire.
Detecting this [Squeeze] and rapidly decreasing current at the exact moment prevent
molten metal being blown off by arc force and enable significant suppression of generation
of spatter. For this purpose, it is important to accurately detect [Squeeze].
6.7.2.23 F34: Automatic correction of [Squeeze] detection sensitivity
Sets whether to automatically correct the detection sensitivity of [Squeeze].
•
[ON]: enables to automatically set the detection sensitivity of [Squeeze].
•
[OFF]: disables to automatically set the detection sensitivity of [Squeeze]. Using the internal function F36
/ F37 (Spatter adjustment), the detection sensitivity can be manually set. (
-
T I P S
• Although the sensitivity to detect [Squeeze] is set for each welding method and wire
diameter, optimum [Squeeze] detection sensitivity varies depending on the factors such
as welding environment (secondary cable length and routing) and welding work
conditions (posture, welding conditions such as lap and fillet, and wire extension) and
inaccurate sensitivity leads to increase of spatter.
0A
Current waveform
Short-circuit current slope period P1
Short-circuit current slope period P2
Arc
Short-circuit
Arc
Squeeze
