ESAB MobileFeed 300 AVS, Instruction Manual

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sectIon 3 operatIon
3.1.3 WIre feeD speeD (constant speeD)
The MobileFeed 300 AVS can be switched to a “Non” Volt-
age Control Mode where the wire feed speed remains rela-
tively constant and will not change speed with changes
in arc voltage. Locate switch SW1 on the PC board and
position S1 and S2. See Figure 3-2. Factory settings are
as follows: S1 - closed, S2 - open.
3.1 controls
3.1.1 poWer sWItch
The ON-OFF switch on the front of the wire feeder case en-
ergizes the wire feeder when the feeder is connected to the
power source and the work piece, and the power source is
turned ON with the contactor closed.
3.1.2 WIre feeD speeD (arc Voltage control)
The wire feed speed is controlled by the wire feed speed dial
on the front of the wire feeder case. When connected to a
constant voltage (cv) type power source, the wire feed speed
dial controls the welding current. Turning the dial clockwise
increases welding current; turning it counterclockwise de-
creases welding current.
When connected to a constant current (cc) type power source,
the wire feed speed dial controls the arc voltage. Turning the
wire feed speed dial clockwise decreases arc voltage; turning
it counterclockwise increases arc voltage. The actual wire feed
speed for any given setting varies with the arc voltage. In-
creasing arc voltage causes an increase in wire feed speed.
The MobileFeed 300 AVS wire feeder is equipped with au-
tomatic “Slow wire run-in”. If the wire feeder senses that
the power source output voltage is in excess of 33 volts,
the “run-in” wire speed automatically decreases for a fixed
period of time (250ms) to improve arc starts. When the arc is
established, the wire feed speed is controlled by the wire feed
speed control knob on the MobileFeed front panel.
figure 3.1 - controls and connections, Mobilefeed 300 aVs
WELDING CABLE
CONNECTION
SHIELD GAS
CONNECTION
Position S1 - open
Position S2 - closed
SW1
figure 3.2
DIp switch functions:
The DIP switches are located on the control PCB mounted
inside the upper compartment of the wire feeder. See fol-
lowing table for switch positions and description.
DIGITAL
METER
WORK
LEAD
TORCH
CONNECTION
10A FUSE
HOLDER
WIRE SPEED
CONTROL
POWER ON-OFF
SWITCH
3.1.4 5 amp cIrcuIt BreaKer (cB1)
This resettable 5 amp circuit breaker, in series with mo-
tor armature, protects the control board from damage if
the motor is stalled.
5A
CIRCUIT BREAKER