6-8.

Troubleshooting – Excessive Spatter

 

 

Excessive Spatter – scattering of molten metal particles that

 

 

cool to solid form near weld bead.

 

 

S-0636

 

Possible Causes

Corrective Actions

Wire feed speed too high.

Select lower wire feed speed.

Voltage too high.

Select lower voltage range.

Electrode extension (stickout) too long.

Use shorter electrode extension (stickout).

Workpiece dirty.

Remove all grease, oil, moisture, rust, paint, undercoating, and dirt from work surface before welding.

Insufficient shielding gas at welding arc.

Increase flow of shielding gas at regulator/flowmeter and/or prevent drafts near welding arc.

Dirty welding wire.

Use clean, dry welding wire.

 

 

Eliminate pickup of oil or lubricant on welding wire from feeder or liner.

6-9.

Troubleshooting – Porosity

 

 

Porosity – small cavities or holes resulting from gas pockets

 

 

in weld metal.

 

 

S-0635

 

Possible Causes

Corrective Actions

Insufficient shielding gas at welding arc.

Increase flow of shielding gas at regulator/flowmeter and/or prevent drafts near welding arc.

 

 

Remove spatter from gun nozzle.

 

 

Check gas hoses for leaks.

 

 

Place nozzle 1/4 to 1/2 in (6-13 mm) from workpiece.

 

 

Hold gun near bead at end of weld until molten metal solidifies.

Wrong gas.

Use welding grade shielding gas; change to different gas.

Dirty welding wire.

Use clean, dry welding wire.

 

 

Eliminate pick up of oil or lubricant on welding wire from feeder or liner.

Workpiece dirty.

Remove all grease, oil, moisture, rust, paint, coatings, and dirt from work surface before welding.

 

 

Use a more highly deoxidizing welding wire (contact supplier).

Welding wire extends too far out of nozzle.

Be sure welding wire extends not more than 1/2 in (13 mm) beyond nozzle.

6-10. Troubleshooting – Excessive Penetration

Excessive Penetration – weld metal melting through base metal and hanging underneath weld.

Excessive Penetration Good Penetration

S-0639

Possible Causes

Corrective Actions

Excessive heat input.

Select lower voltage range and reduce wire feed speed.

 

Increase travel speed.

OM-1314 Page 29

Page 33
Image 33
Miller Electric M-15 Troubleshooting Excessive Spatter, Troubleshooting Porosity, Troubleshooting Excessive Penetration

M-15 specifications

Miller Electric M-15 is a highly regarded welding machine designed to cater to a variety of welding applications in both industrial and commercial environments. Known for its reliability and efficiency, the M-15 stands out in the Miller Electric lineup due to its impressive performance and user-friendly features.

One of the primary characteristics of the M-15 is its versatility. It supports multiple welding processes, including MIG, TIG, and Stick welding. This multi-process capability allows operators to switch between different techniques without needing to change equipment, making it an ideal choice for fabricators and maintenance professionals who handle various welding tasks.

The M-15 is engineered with advanced inverter technology, which enhances its performance and efficiency. This technology allows for a lightweight design while still delivering powerful output. The machine offers a wide range of amperage, making it suitable for welding thin materials as well as thicker sections. As a result, the M-15 can tackle everything from delicate sheet metal projects to robust structural welds.

Another standout feature is its intuitive control panel, which simplifies operation for both novice and experienced welders. The easy-to-read display provides essential information regarding settings and performance, allowing users to make adjustments on the fly. This user-friendly interface minimizes the learning curve and maximizes productivity in the workshop.

In terms of safety, the Miller Electric M-15 incorporates several features designed to protect users during operation. Its built-in thermal overload protection automatically shuts down the machine in case of overheating, thus preventing damage to the equipment and ensuring the safety of the operator.

Durability is also a hallmark of the M-15. Constructed with high-quality materials, this welding machine is built to withstand the rigors of daily use in demanding environments. The housing is designed to protect internal components from dust, debris, and accidental impacts, ensuring consistent performance over time.

Overall, the Miller Electric M-15 combines advanced technology, versatility, and reliability into a compact and powerful welding machine. Its user-friendly design, safety features, and robust construction make it a top choice for professionals looking to invest in a reliable welding solution. Whether for heavy industrial applications or lighter fabrication work, the M-15 is equipped to meet a wide range of welding challenges with confidence.