Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1995-09-12
1997-12-16
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
25055929, H01J 4014
Patent
active
056988435
ABSTRACT:
A computer aided error measurement system is disclosed. The horizontal and vertical straightness errors as well as roll, pitch and yaw errors are measured simultaneously with just one setup according to the system. The system includes a computer and related components thereof. The system also includes a light source, two beam splitters, and three photodetectors. The output signals are inputted into the computer via amplifying circuits and an analog to digital converter. The computer actuates a motor driver to drive a stepping motor and controls a feed axis with the motion errors. The whole measurement takes are performed in very short time and in real time.
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Draft Standard, Methods for Performance Evaluation of Computer Numerically Controlled Machining Centers, ANSI/ASME B5. 54-1991, p. 101, 1991.
Manfred Weck, Handbook of Machine Tools, Metrological Analysis and Performance Tests, vol. 4, 1994, p. 32, translated by H. Bibring.
Pyo Kevin
Westin Edward P.
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