9-12. 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.

9-13. 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.

 

 

9-14. 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.

 

 

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Hobart Welding Products OM-947 manual Troubleshooting − Lack Of Penetration, Troubleshooting − Incomplete Fusion
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OM-947 specifications

Hobart Welding Products has made a significant mark in the welding industry with its cutting-edge equipment, and the Hobart OM-947 is no exception. This multi-process welder stands out for its versatility and user-friendly design, ideal for both beginners and experienced welders alike.

One of the main features of the OM-947 is its multi-process capability, allowing users to perform MIG, TIG, and stick welding, all in one machine. This flexibility makes it an appealing choice for diverse welding applications, whether in automotive repair, metal fabrication, or industrial maintenance. The OM-947 can easily switch between processes, ensuring efficiency and convenience in various tasks.

The machine is engineered with advanced technology that enhances welding performance. Its inverter technology provides a stable arc and reduces energy consumption, which not only cuts down operational costs but also improves the welder's overall performance. The Hobart OM-947 boasts a high-duty cycle, allowing users to operate it for extended periods without overheating, making it suitable for professional environments.

In terms of characteristics, the OM-947 features a digital display that allows for precise control over welding parameters. This user-friendly interface simplifies the adjustment process, enabling welders to focus more on their craft rather than struggling with complex settings. The machine also comes with a built-in automatic voltage control, which adjusts the voltage according to the chosen process and material thickness, ensuring optimal welding conditions and reducing the risk of defects.

Another notable aspect of the OM-947 is its portability. Weighing in at a manageable level, coupled with a compact design, the machine is easy to transport between job sites, making it ideal for mobile welders. Furthermore, the rugged construction of the unit ensures durability even in demanding environments.

Safety features are paramount in welding equipment, and the Hobart OM-947 does not disappoint. It includes a thermal overload protection system that prevents overheating and potential damage to the welder, offering peace of mind during use.

Overall, the Hobart Welding Products OM-947 delivers impressive performance, versatility, and user-friendliness. It is designed for welders who demand quality and reliability from their equipment while being accessible enough for those who are just starting their welding journey. With its innovative features and robust design, the OM-947 truly sets a benchmark in the world of welding.
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