7. Welding operation
WMD078TE0PAA07
61
(6.
Pre-operation check)
2
)
How to check “Wire extension length”
<Semi-automatic welding: distance between tip and base metal>
•
Welding current output value to the welding current set value is
based on the following “Tip-base metal distance”.
•
Difference in tip-base metal distance between actual value and the
value in the following table creates a difference between the actual
output current and current set value.
•
As it also affects shielding performance, make sure to set the tip-
base metal distance according to the following table.
3)
How to check ”INCHING” function
Perform inching operation and check if wire feeds properly.
(See section “
7.1.4 Checking INCHING function
68.)
4)
How to check ”Shield gas”
If it is necessary to check the shield gas, such as flow rate, press the
GAS CHECK button.
(1)
Check if flow rate adjust-
ment knob is in the SHUT
position.
Then open the main valve
of the gas cylinder..
(2) Press the GAS CHECK but-
ton on the operation panel.
(3) Gradually turn the flow rate
adjustment knob to the
“OPEN” position until the
flow meter indicates the
suitable value.
(4) After completing the flow
rate adjustment, press the
GAS CHECK button again.
Tip-base metal distance (mm)
Welding current
set value
Wire diameter (mm)
0.8
0.9
1.0/1.2
1.4/1.6
50 A
10
12
15
ー
100 A
10
12
15
ー
150 A
10
12
15
ー
200 A
14
18
18
18
250 A
ー
18
18
18
300 A
ー
ー
22
22
350 A
ー
ー
25
25
400 A
ー
ー
ー
27
CAUTION
Prior to checking, read the operating
instructions of the gas regulator. Wrong
handling can cause injury due to high-
pressure gas.
Main valve
Primary
Flow
Gas regulator
Ground
terminal
<OPEN>
meter
pressure
gauge
OPEN
Flow rate
adjustment knob
Gas cylinder