Lincoln Electric IM555 manual Welding Capability, Limitations

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.

TABLE B.1 V300 OUTPUT DERATING

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
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 MIG PULSER