OPERATION | ||
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FIGURE B.13
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B. INSTALL SHIELDING GAS
MIG welding requires an appropriate bottle of shielding gas. For mild steel either a cylinder bottle of Ar/CO2 or
100% CO2 can be used refer to the following instructions to properly connect shielding gas to the machine.
WARNING
CYLINDER may explode if dam- aged. Keep cylinder upright and chained to support
• Keep cylinder away from areas where it may be damaged.
•Never lift welder with cylinder attached.
MALE END
REGULATOR
ADAPTER
S19298
PLASTIC
CO2 | WASHER |
100% |
|
FEMALE END |
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75/25 |
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MIXES |
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3.Attach the flow regulator to the cylinder valve and tighten the union nut securely with a wrench.
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•Never allow welding electrode to touch cylinder.
•Keep cylinder away from welding or other live electrical circuits.
WARNING
BUILDUP OF SHIELDING GAS may harm health or kill.
• Shut off shielding gas supply when not in use.
1.Secure the cylinder to a wall or other stationary sup- port to prevent the cylinder from falling over. Insulate the cylinder from the work circuit and earth ground. Refer to Figure B.13.
2.With the cylinder securely installed, remove the cylinder cap. Stand to one side away from the out- let and open the cylinder valve very slightly for an instant. This blows away any dust or dirt which may have accumulated in the valve outlet.
WARNING
BE SURE TO KEEP YOUR FACE AWAY FROM THE VALVE OUTLET WHEN “CRACKING” THE VALVE. Never stand directly in front of or behind the flow regulator when opening the cylinder valve. Always stand to one side.
NOTE: If connecting to 100% CO2 cylinder, a CO2 regulator adapter (S19298) is required and must be purchased separately. When using the CO2 adapter be sure to install plastic washer included in the fitting on the bottle side.(See Figure B.13 )
4.Refer to Figure B.13. Attach one end of inlet gas hose to the outlet fitting of the flow regulator and tighten the union nut securely with a wrench. Connect the other end to the machine Solenoid Inlet Fitting
SHIELDING GAS
1.For CO2, open the cylinder very slowly. For argon- mixed gas, open cylinder valve slowly a fraction of a turn. When the cylinder pressure gauge pointer stops moving, open the valve fully.
2.Set gas flow rate for 30 to 40 cubic feet per hour (14 to 18 I/min.) under normal conditions, increase to as high as 40 to 50 CFH (18 to 23.5 I/min.) under drafty (slightly windy) conditions.
3.Keep the cylinder valve closed, except when using the machine.
COMPACT WIRE WELDERS
