B-2
OPERATION
B-2
DESIGN FEATURES AND ADVANTAGES
•Simple controls make this unit easy to set up and
adjust.
•The control algorithm is adaptive — it responds to
changes in stick-out and gun angle while maintaining
a stable arc.
•Designed to the IEC-974-1 standard.
•Attractive, rugged case includes carrying handle and
rubber feet.
•Unit is supplied with one bracket for mounting to the
V300, and one “universal” bracket for mounting to ver-
tical or horizontal surfaces.
WELDING CAPABILITY
The V300 must be derated when used for GMAW-P
with the MIG Pulser. High peak currents required by
the pulse process increase the power source heating,
thus reducing the rated output. The V300 Pro and
V300-I (with three phase input) are presently rated 300
amps at 60% duty cycle. When pulsing, the ratings of
both models must be reduced to 250 amps at 60%.
The single phase rating of the V300 PRO must be
reduced from 250 amps/60% to 200 amps/60% when
pulsing. The single phase rating of the V300-I must be
reduced from 200 amps/60% to 150 amps/60% when
pulsing. Refer to Table B.1.
LIMITATIONS
The V300/MIG Pulser combination cannot be used
with long work and electrode leads. The total length of
the welding leads (work lead length plus electrode lead
length) should not exceed 50 feet. [If longer cables
are used, refer to the
Output Cables for Pulse
Welding
section in the Installation chapter for limita-
tions.]
The Magnum Spoolgun/MIG Pulser combination will
not run low wire feed speed, fine wire aluminum pro-
cedures well. These wires are best run in a spray
mode; GMAW-P offers few advantages in those areas.
The voltage meter on the wire feeder will not display
voltage due to the lack of a 21 lead in the feeder con-
nection.
The V300 with a MIG Pulser may not be suitable for
use near a high frequency arc starter (such as is found
in a TIG welding power source or a plasma cutter).
Refer to
High Frequency Interference Protection
section in the Installation section of this manual.
Problems with the trigger interlock may be experienced
when using the MIG PULSER with an LN9-GMA that
has a L7265-2 power board.
MIG PULSER
V300 PRO Standard V300 PRO Rating V300 PRO Rating when Using
Input Power (without MIG Pulser) MIG Pulser
3 Phase, 60 Hz 300 Amps / 60 % Duty Cycle 250 Amps / 60 % Duty Cycle
1 Phase, 60 Hz 250 Amps / 60% Duty Cycle 200 Amps / 60% Duty Cycle
TABLE B.1 V300 OUTPUT DERATING
V300-I Standard V300-I Rating V300-I Rating when Using
Input Power (without MIG Pulser) MIG Pulser
3 Phase, 50 Hz 300 Amps / 60 % Duty Cycle 250 Amps / 60 % Duty Cycle
1 Phase, 50 Hz 200 Amps / 60% Duty Cycle 150 Amps / 60% Duty Cycle
JAN97
