Monitoring weld voltage
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United States of America Patent
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-
Dec 15, 1992
Grant Date -
N/A
app pub date -
Jun 28, 1991
filing date -
Jun 30, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A seam weld machine includes a voltage monitoring circuit (9) for determining weld quality. The voltage is sensed by two pick-ups. A first pick-up is in the form of a conductive rider (10), mounted to directly sense the voltage from a weld wire (4). The wire (8) from the second pick-up is short and is fed through a gap in the z-bar (6) of the machine to emerge close to the wire from the first pick-up, thus reducing electromagnetic interference and noise.
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