A five-year journey with love and dedication. MIG welder troubleshooting guide provides welding troubles and its explanation.

Like another welding process, MIG welding has some complications. However, knowing these complications will help you to protect the machine from problems and their solution. Here I’m going to tell you about some common MIG welder troubleshooting, you can boast the quick fix to your welding defects.

Some basic problems of MIG welder are described as below:

Reason:

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The machine can create a problem for starting because of many reasons. Some fundamental rights are wrong input voltage, blown up of fuse, or having a problem in the circuit. Further, having the problem of starting the machine can cause overheating.

Key:

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If you notice that the machine is not starting correctly then you have first to check that the machine is appropriately switched. If it is appropriately changed then check the other possible reason and solve them. You must verify that the input voltage is set correctly and follow the manual for avoiding this problem. Alternately, if the machine gets overheated then shut down it and keep it for cooling down. If the fuse is blown up, then you must replace it as early as possible.

Reason:

If you turn on the machine and it starts correctly, and suddenly the fuse creates trouble then there has a defective fuse. It may result in a short circuit. As well, the other reason may be the wick is too small for the machine.

Key:

Noticing this problem, you have to solve the short circuit. Rather, if the fuse is too small for the machine then change the fuse with a bigger fuse to avoid this problem.

Reason:

If the polarity switch is worn out or the welder is under load then the polarity switch stops working.

Key:

Noticing this problem, you must change the polarity switch and make sure that you are not using the welder under load conditions.

Reason:

If there has a loose connection or has set an irregular duty cycle then the electrode holder will heat up.

Key:

To solve this problem you must tight the connection. In preference, if causes by an irregular duty cycle then you have to change that with the proper size.

Reason:

If you are not grounded in the frame of the welder machine properly then it may cause electrical shocks.

Key:

In this case, you have to follow the manual and instruction of grounding the frame properly to avoid electrical shocks. If you ground the chassis correctly, then you will not face any electrical shocks.

Reason:

If the cable is in a defective condition or the duty cycle is improper then the wire will heat up very faster.

Key:

For avoiding this problem you must change the cable with proper condition and size. Yet, you will know the appropriate scope of wire in the user manual.

Reason:

When the machine gets implicated by oxides that can change the flow of current and can create a high stumbling block of the machine then the ground clamp will be in lousy condition.

Key:

Make sure that you are cleaning the ground clamp regularly for avoiding the building up of oxides that cause the creation of a stumbling block of the machine.

Reason:

If you are using the cable for a long time then it can damage.

Key:

If you notice that the cable is in a damaged condition then you must change it instantly otherwise it will affect your working quality and create a problem too.

If you notice any poor welding result then you may replace or repair the parts of the welder. Due to poor welding result only causes defective portions of the machine. Below is given some common welding defects and its solution.

Reason:

A widespread welding defect may cause by inappropriate MIG welder wire feed problems that are occurred by worn driver rolls.

Key:

Clean the driver roll periodically and remove all the dirt from the liner for avoiding this problem. Besides, replace the driver roll if it’s necessary.

Reason:

When the welding gun’s tip worn out then it can cause flat welding. If it happens suddenly, you won’t get a proper welding result.

Key:

You must replace the tip just after noticing this problem.

Reason:

Another common welding defect is porosity. Insufficient gas flow occurs.

Key:

For avoiding this problem you must check that the gas nozzle is plugged in correctly. Again check that the wired connection is plugged in correctly.

Reason:

If the wire is pale or having a small follicle can cause a shrinkage crash on the weld.

Key:

If the follicle is of sufficient size then you won’t face this problem. Always remember that there is no rust in the welding area.

Reason:

Lateral cracks on the weld can occur by the fast welding speed or low current or high arc voltage.

Key:

For avoiding Lateral cracks on the weld, maintain a constant welding speed. Make sure that the arc voltage is still constant.

Reason:

Excess spatter is a widespread welding defect. It can be caused by high voltage or excess CO2 or improper impedance.

Key:

By using a gas heater you can avoid this problem. You can along prevent excess spatter by using appropriate voltage.

Some advanced problems of mig welder and their solutions are described as below:

A.Absorbency or Porosity Problem

Surface Conditions Inappropriate:

Metal porosity can causes if the surface is contaminated with rust, grease, and oil. Likewise, a surface that is open in the atmospheric air causes metal porosity.

Key:

For avoiding the contaminated surface, clean the material at the following methods.

Gas Coverage:

The inappropriate gas shield can cause a porosity problem. The function of shielding gas is to protect the weld puddle from the air. If the shielding gas change with wind then porosity occurs.

Key:

If the gas hose is attached to the equipment correctly then there is no chance to catch the air and can cause porosity.

Mismatch Base Metal:

The mismatched base metal creates another common porosity problem. For example, you are not using the same baking bar material of the metal that you are welding.

Key:

To avoid this problem you have to use the same baking bar material of the metal that you are going to weld.

A.Inappropriate Bead Problem

Heat Inputs Lacking:

Improper input power can be caused by a bead problem.

Key:

For avoiding this problem,

Mac Tools Mw130 Mig Welder Manual