Optics: measuring and testing – Standard
Patent
1995-03-20
1996-07-16
Rosenberger, Richard A.
Optics: measuring and testing
Standard
356401, G06K 900
Patent
active
055372040
ABSTRACT:
A method and apparatus for calibrating and performing statistical capability analysis of a pick-and-place machine comprise loading a glass fiducial plate onto a workholder of a pick-and-place machine, loading a glass slide onto a part placement nozzle of the pick-and-place machine, and placing the glass slide onto the plate. Alignment of a chrome fiducial on the fiducial plate with a chrome target window on the slide is examined. Responsive to the alignment of the target and the fiducial, key calibration codes in calibration software of the pick-and-place machine are adjusted. Once calibration is complete, multiple placement cycles using the glass fiducial plate and glass slides are performed to determine the statistical placement capability of the pick-and-plate equipment.
REFERENCES:
patent: 4776088 (1988-10-01), Biggs et al.
patent: 5237622 (1993-08-01), Howell
patent: 5247844 (1993-09-01), Howell
"Test Target-For Robotic Vision Placement of Surface Mount Devices", Start, Applied Image, Inc., 1993, p. 60.
Woodhouse, "Low-Cost Calibration: Key to Effective Placement", SMT, May 1994, pp. 36-40.
Martin Kevin D.
Micron Electronics Inc.
Rosenberger Richard A.
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