Variations in Cylinder Response

An upside down projection weld nut will allow current to pass however it will not produce a quality weld. Other conditions such as non existing projections will also produce the same response - current will be detected but there will be no weld produced.

There are tools that can be used to capture such condition and then to flag the defect with a fault output. Many tools have been created with the advent of processors used in welding controls able to interface to machine sensors.


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