Method and apparatus for calibrating a travel path and/or an angular position of a holding device in a means for manufacturing electrical assemblies as well as a calibration substrate
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United States of America Patent
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-
Apr 25, 2000
Grant Date -
N/A
app pub date -
Oct 28, 1998
filing date -
Sep 2, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Prior art methods calibrate the travel path and/or the angular position of holding devices in equipment for manufacturing electrical assemblies by optical measurements of the position of simulations of electrical components that are equipped on a calibration substrate. Markings on the simulations and local reference marks on the calibration substrate serve this purpose. Printed circuit board cameras that are utilized as optical sensors exhibit a pronounced camera distortion that makes the calibration more difficult. As a result of the method, the apparatus as well as the calibration substrate, a sensor correction factor is determined in that the position of two correction marks that are applied on the calibration substrate at a predetermined nominal spacing and a predetermined position relative to one another are measured with the printed circuit board camera. The result of the measurement is compared to the nominal spacing.
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