6-11. Troubleshooting – Lack Of Penetration

 

Lack Of Penetration – shallow

 

fusion between weld metal and

 

base metal.

Lack of Penetration

Good Penetration

 

S-0638

Possible Causes

Corrective Actions

Improper joint preparation.

Material too thick. Joint preparation and design must provide access to bottom of groove while

 

maintaining proper welding wire extension and arc characteristics.

Improper weld technique.

Maintain normal gun angle of 0 to 15 degrees to achieve maximum penetration.

Keep arc on leading edge of weld puddle.

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

Insufficient heat input.

Select higher wire feed speed and/or select higher voltage range.

Reduce travel speed.

6-12. Troubleshooting – Incomplete Fusion

Incomplete Fusion – failure of weld metal to fuse completely with base metal or a preceeding weld bead.

 

S-0637

 

 

Possible Causes

Corrective Actions

 

 

Workpiece dirty.

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

 

welding.

Insufficient heat input.

Select higher voltage range and/or adjust wire feed speed.

Improper welding technique.

Place stringer bead in proper location(s) at joint during welding.

Adjust work angle or widen groove to access bottom during welding.

Momentarily hold arc on groove side walls when using weaving technique.

Keep arc on leading edge of weld puddle.

Use correct gun angle of 0 to 15 degrees.

6-13. Troubleshooting – Burn-Through

Burn-Through – weld metal melting completely through base metal resulting in holes where no metal remains.

S-0640

Possible Causes

Corrective Actions

Excessive heat input.

Select lower voltage range and reduce wire feed speed.

Increase and/or maintain steady travel speed.

OM-1314 Page 30

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Miller Electric M-15 Troubleshooting Lack Of Penetration, Troubleshooting Incomplete Fusion, Troubleshooting Burn-Through
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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.
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