1/F-P
I
1
I-G
dt2
I
v
D
a)
b)
t
dt1
t
up
t
down
I
S
I
E
Fd.2
Fd.1
t
dcY
Legend:
I
S
Starting current   dcY Duty cycle
I
E
Final current   I-G Ground current
t
up
Upslope   I
1
Main current
t
Down
Downslope   F-P
Pulse frequency 
1)
Fd.1 Wire feed speed 1   Fd.2 Wire feed speed 2
dt1 Delay in the start of wirefeeding
from the beginning of main cur-
rent phase I
1
  dt2 Delay in the end of wirefeeding
from the end of main current
phase I
1
1)
 (1/F-P = time interval between 2 pulses)
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