Use and Care Manual

 WELDING PROCESS

1. Please refer to “Welding Control Guide” that is located inside the welding machine door for the

output voltage and wire feed rates.

2. Inspect output polarity according to the welding wire being used and ensure whether or not

shielding gases are needed.

3. Connect the ground (work) clamp to the piece(s) to be welded; there should be a good connection

for the ground (work) clamp to the piece(s).

4. The welding gun should be able to move freely in the area of the piece(s) to be welded.

5. Power on the MIG140 welding machine

6. Pull down welding protective helmet, press the trigger of the welding gun and begin to weld.

Keep the contact tip of the welding gun at around 3/8” to 1/2” (10-13mm) away from piece(s) to

be welded.

7. Release trigger of the welding gun and the welding is stopped.

8. After welding, turn off the valve of the compressed gas cylinder (if gas is used) and then press

trigger of the welding gun to release compressed gas in system. Finally, power off the MIG140

welding machine.

 OVERLOAD PROTECTION

Overload protection for power supply to welding

The MIG140 Welding Machine is equipped with a circuit breaker and a thermostat, which

protects the machine from damage if maximum output is exceeded. The circuit breaker button

will extend out when tripped. The circuit breaker must be manually reset. Wait for several

minutes while the welding machine cools down and reset the circuit breaker button.

 THERMAL PROTECTION

The MIG140 has a rated output duty cycle of 20%. If the duty cycle is exceeded, a thermal

protector will shut off the output until the machine cools to a reasonable operating temperature.

This is an automatic function and does not require user intervention. The fan continues to run

during cooling.

 OVERLOAD PROTECTION TO WIRE FEEDER

The MIG140 model has two automatic circuits to protect the motor of the wire drive.