Lincoln Electric IM597 7.3 CV/CC POSA START OPERATING PROCEDURE, Posa Start Controls, Gas Inlet

wire you are using. When in the .030-.035aluminum only position, the slave motor produces approximately 1 1/2 lbs. inches and approximately 4 1/2 lbs. inches when in the all other wires position.

(NOTE: Operating the cabinet with the switch in the wrong position will cause wire feed difficulties.)

7.2.3 POSA START CONTROLS

The Posa Start Run-in Speed Control, located on the front panel, provides adjustment for slow wire run-in. Once the arc has been established, the wire feed speed is automatically changed from the slow run-in speed to the welding speed set on the torch potentiometer.

7.2.4 TORCH AMPHENOL CONNECTORS

The Cobramatic® contains a 7 pin “W” clocked amphenol.

7.2.5 CONDUIT INLET

The Conduit Inlet provides access to the slave motor outlet guide.

7.2.6 GAS INLET

Provides access to the gas fitting inside the cabinet.

7.2.7 POWER INLET

The Power Inlet provides access to the power block inside the cabinet.

7.3 CV/CC POSA START OPERATING PROCEDURE

7.3.1 GENERAL

The Posa Start feature allows the Cobramatic® to be used in combination with constant current DC welding power sources of open circuit voltage in excess of 55 volts - also, any constant voltage welding power source capable of a minimum of 50 amps.

(NOTE: Reverse polarity MUST be used.)

CAUTION:

DO NOT OPERATE A COBRAMATIC® ON A POWER SOURCE HAVING A HIGH-FREQUENCY STARTING CIRCUIT BEFORE MAKING SURE THAT THE HIGH-FREQUENCY PORTION OF THE POWER SOURCE IS TURNED OFF. FAILURE TO TAKE THIS PRECAUTION WILL CAUSE PERMANENT DAMAGE TO THE POSA START CIRCUITRY.

The Posa Start Run-in Speed Control, located on the front panel, provides adjustment for slow wire run-in. Once the arc has been established, the wire feed speed is automatically changed from the slow run-in speed to the welding speed set on the torch potentiometer.

7.3.2 CV POSA START OPERATION

Attach Cobramatic® to CV power source according to the installation instructions.

Turn the Cobramatic® to the “ON” position and the Posa Start to the “OFF” position.

Adjust power source to desired voltage for your weld condition.

Depress gun trigger and adjust wire feed speed at gun to match voltage setting. If approximate wire feed is not known, it is better to start with excess wire feed rather than too little, in order to prevent a “burn-back”.

Turn the Posa Start switch to the “ON” position. Press torch trigger and, using Run-in Speed Control, adjust wire feed rate to approximately 10% of welding wire speed set at torch.

Strike an arc, and adjust wire feed rate at gun until correct condition is achieved.

K1587-1 Cobramatic® Owner's Manual - Page 13