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

Aug 12, 2003 Mac Mig Welder, 04:21 PM. Does anyone know who makes the 130amp mig welder for Mac Tools? Join Date: Feb 2003. #RUSTY #JUNKSHIT #MACTOOLS Best thing to do with a Mac welder. Be sure to watch Behind the scenes of the Mac tools welder review https://youtu.be/MatrE4fGIqA. MW 100, MW 130, MW 130A, MW 135, MW 145, MW 145A, MW 145N, MW 150, MW 150K, MW165, MW 165A, MW 175, and MW 185N. 4 Nozzle Springs. This is letter D in the 2nd picture. These USAWELD Nozzle Springs fit several of the Mac Tools Mig Welders that were sold, including the followingMac Tools Mig Welding Machines. Scott, that is one of our machines. The easiest way to get a manual will probably be going to the Millerwelds site, go to the service section, pull up the Econotig, enter your serial number, and that should be the manual you need. Keep in mind that the manual will not have the Mac Tool logo, but the info. Contained in the manual should be correct.

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:

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:

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.

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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.

Mac Tools Mig Welder Parts

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, set the input power correctly according to the thickness of the metal.

Incorrect Technique:

Using the wrong technique in welding can cause bead problems.

Key:

For avoiding this problem, you must adopt the right technique of welding.

Insufficient Work Cable:

Using a small cable in welding will cause a bead problem.

Key:

Use the appropriate size of cable to avoid this problem.

3.Fusion Shortage

Cold Lapping:

The lacking of fusion occurs in cold lapping. In this method, the wire straightly touches the welding pool and melts the wire.

Key:

For avoiding cold lapping you must check that the voltage and amperage are in the right form.

A.Defective Wire Delivery Problem

Contact Tip:

The contact tips can occur faulty wire delivery. The tips can get obstructed by the overplus of spatter or by touching on the welding puddle.

Key:

You can solve this problem by just changing the contact tips. Anyhow, you must remember one thing that you are using the right size of contact tips.

Mac Tools Mw130 Mig Welder Manual User

Gun Liner:

Inappropriate size of the gun liner can cause the short wire delivery. It also creates by extending wire.

Key:

To avoid this problem you have to use the proper size of the gun liner. Including, make sure that you are cleaning the gun liner regularly to keep them free from dust. You have to change the ships frequently.

Worn Out Gun:

Worn out gun can create wire feeding problem.

Key:

After noticing this problem, you must replace or change the worn-out gun instantly.

Drive Roll:

Inappropriate drive roll pressure can create a problem in wire feeding. When the drive roll is too loose, then the wire feeding will stop, or if the drive is too tight, then it will crash.

Key:

You must keep the drive roll pressure in such a way that is not too loose or not too tight for avoiding this kind of problem.

Outcome

I guess you have got enough knowledge about MIG welding troubleshooting. If you want to avoid the accident by the machine, then you have to know all the MIG welder troubleshooting and its solution.