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    Characterization of large scale gas metal arc welding systems

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    Characterization of large scale ...
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    Author
    Neill, Andrew Michael
    Advisor
    Steele, John P. H.
    Date issued
    2014
    Date submitted
    2014
    Keywords
    system characterization
    work cell design
    welding
    Gas metal arc welding
    Gas metal arc welding -- Calibration
    Power (Mechanics)
    System design
    
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    URI
    http://hdl.handle.net/11124/12258
    Abstract
    It is often the case that newly assembled robotic welding systems that use gas metal arc welding do not perform as expected. This is often due to a lack of knowledge about the intrinsic characteristics of the welding system. The objective of this project is to provide an understanding and a methodology of characterizing large-scale arc welding systems and to provide a way to improve calibration of these systems. The results from this project demonstrate that most welding work cell calibration error is due to incorrect feedback in the welding power supply's sensing system, usually caused by unaccounted for voltage drops in the welding loop. The problem can be resolved by following special work cell design criteria, altering the voltage feedback, or recalibrating the power supply with the entire system. The findings presented here will give manufacturers the ability to standardize their work cells which will provide more consistent welding and reduced programming time because welding parameters will not have to be adjusted due to poor calibration.
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