n
m/min
-- 29 --
bi09d1e2
Difference in wire feed speed
Cycle time (s)
The graphs for 15 m/min and 20 m/min respectively refer to the primary wire feed
speed. The cycle time is the sum of the primary and secondary phase weld time.
The difference between primary and secondary wire feed speed must not exceed the
speed that is indicated by the graphs of the primary wire feed speed.
Example: If the cycle time is 0.25 and the primary wire feed speed is 15 m/min the
difference between primary and secondary wire feed speed must not exceed
6 m/min.
Welding example A
In this exemple we will weld a
10 mm plate
with
1.2 mm aluminium wire
and
argon
shielding gas .
Make the following settings with the controller:
Process
MIG SUPERPULSE
MIG SUPERPULSE
Phase
Primary
Secondary
Method
Dip/spray
Pulse
Wire type
Al Mg
Al Mg
Shielding gas
Ar
Ar
Wire dimension
1.2 mm
1.2 mm
Voltage
(+ 1.0V)
(+ 3.0V)
Wire feed speed
15.0 m/min
11.0 m/min
Phase weld time
0.1 s
0.1 s
The primary and secondary phase time is 0.1 s + 0.1 s =
0.2 s.
The difference in wire feed speed is 15.0 m/min -- 11.0 m/min =
4 m/min.
GB