Table 6-2. Excessive Spatter

 

Excessive Spatter − scattering of molten

 

metal particles that cool to solid form near

 

weld bead.

Possible Causes

Corrective Actions

Amperage too high for electrode.

Decrease amperage or select larger electrode.

Arc length too long or voltage too high

Reduce arc length or voltage.

 

Table 6-3. Incomplete Fusion

 

Incomplete Fusion − failure of weld metal

 

to fuse completely with base metal or a

 

preceeding weld bead.

Possible Causes

Corrective Actions

Insufficient heat input.

Increase amperage. Select larger electrode and increase amperage.

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.

Workpiece dirty.

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

 

welding.

 

Table 6-4. Lack Of Penetration

 

Lack Of Penetration − shallow fusion be-

 

tween weld metal and base metal.

Lack of Penetration

Good Penetration

Possible Causes

Corrective Actions

Improper joint preparation.

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

Improper weld technique.

Keep arc on leading edge of weld puddle.

Insufficient heat input.

Increase amperage. Select larger electrode and increase amperage.

 

Reduce travel speed.

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Hobart Welding Products OM-950 manual Excessive Spatter, Incomplete Fusion, Lack Of Penetration
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OM-950 specifications

Hobart Welding Products has been a respected name in the welding industry, providing high-quality equipment and solutions for a wide range of welding applications. One of their notable offerings is the Hobart OM-950, a powerful and versatile MIG welder designed to meet the needs of both professionals and hobbyists alike.

The Hobart OM-950 is engineered for optimal performance and user-friendly operation. This machine stands out due to its robust construction, capable of withstanding the rigors of industrial environments while remaining portable enough for at-home use. With a maximum output of 950 amps, it is well-suited for various welding jobs, from thin sheets of metal to heavier gauge materials.

One of the main features of the OM-950 is its advanced inverter technology which allows for a lightweight and compact design without sacrificing power. This technology not only enhances portability but also improves energy efficiency, resulting in lower operational costs. The machine is designed to operate on both 230V and 460V input power, making it versatile for different work settings.

Another key characteristic of the OM-950 is its impressive duty cycle. With a 60% duty cycle at 950 amps, users can engage in extended welding operations without the risk of overheating. This is particularly advantageous during long projects where consistent performance is crucial.

The OM-950 also includes a user-adjustable output range, allowing for precise control over the welding process, which is essential for achieving clean and professional results. The welder incorporates a digital display that provides real-time feedback on settings and performance, ensuring that operators can easily make necessary adjustments on the fly.

Additionally, the Hobart OM-950 features a spool gun capable of handling aluminum and other non-ferrous materials, which expands its usability across various welding applications. The machine's built-in safety features, such as thermal overload protection, further enhance its reliability and ease of use.

With its combination of power, versatility, and user-friendly features, the Hobart Welding Products OM-950 is an excellent choice for those looking for a high-performance MIG welder that can tackle diverse welding tasks efficiently and effectively. Whether for professional use or home projects, this machine delivers on quality and innovation, making it a preferred choice among welders.
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