ESAB MobileFeed 300 AVS, Instruction Manual

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28
sectIon 3 operatIon
Mobilefeed Dip switch table
switch position
open (off)
closeD (on)
Description
factory setting - constant current operation ( “Voltage control Mode” )
In this operation mode the MobileFeed feeder is ready for connection to a “ Constant
Current “ power source which typically provides a high open circuit voltage and low
short circuit current which makes arc starting difficult. Therefore, “slow run-in” of the
wire is automatically enabled if OCV exceeds 33 volts to provide good and reliable
arc starting. The arc length during welding is determined by a combination of the
wire feed speed knob position (MobileFeed feeder front panel) and the weld “Cur-
rent” setting on the CC power source. When a good welding condition is achieved,
the arc length will be maintained by changes in wire feed speed provided by arc volt-
age control. Variables causing changes in arc voltage, for example, wire “stick-out”,
wire density or shielding variations, will cause the wire feed speed to compensate to
maintain the arc length preset.
alternate setting - constant Voltage operation ( “constant Wire feed speed” )
In this operation mode the feeder is ready for connection to “ Constant Voltage “
power source which is typically used for most GMAW (MIG/MAG) welding. CV power
sources provide high short circuit currents for good arc starting and wire burn-off.
“Slow run-in” of the wire is automatically disabled. The arc length while welding is de-
termined by a combination of the wire feed speed knob position (MobileFeed feeder
front panel) and the weld “Voltage” setting on the CV power source. When a good
welding condition is achieved, the arc length will be maintained by the power source
and the wire feed speed will remain constant. Any variations in wire “stick-out”, wire
density or shielding variations, could cause the arc length (arc voltage) variations.
note:
If both switches are placed in the OPEN (Off) position the wire feed motor is disabled and the motor will NOT run.
1
2
Rocker
Down
O
P
E
N
1
2
Rocker
Down
O
P
E
N