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Publication numberUS3656124 A
Publication typeGrant
Publication dateApr 11, 1972
Filing dateSep 26, 1968
Priority dateSep 26, 1968
Also published asCA961959A1, DE1948490A1, DE1948490B2, DE1948490C3
Publication numberUS 3656124 A, US 3656124A, US-A-3656124, US3656124 A, US3656124A
InventorsJohn K Mcgee
Original AssigneeGiddings & Lewis
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Linear and circular interpolation contouring control using repeated computation
US 3656124 A
Abstract
A numerical path control system including a time shared digital computer generating for each of a plurality of axes regularly recurring numerical excursion commands. A two axis system is shown to be capable of deriving from a small number of data words successive straight line path or circular arc path command signals at a rate of 50 times a second and of converting these into intermediate or secondary command signals which are applied to the servos of the machine axes at a rate of 500 times a second.
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Description  (OCR text may contain errors)

United States Patent {15] 3,656,124 1 51 Apt-.11, 1972 McGee 154] LINEAR AND CIRCULAR INTERPOLATION CONTOURING CONTROL USING REPEATED COMPUTATION [72] Inventor: John K. McGee, Houston, Tex. [73] Assignee: Giddings 81 Lewis, lnc., Fond du Lac, Wis.

[22] Filed: Sept. 26, 1968 r [2!] Appl. No.: 762,835

521 u.s.c1 .Q ..340/|72.s, 318/573 [51] Int. Cl. ..G061 15/46 [58] FieldofSeareh ..235/l57, 151.11, 197; 340/1725; 318/20, 573

[56] Relerences Cited UNITED STATES PATENTS 1058,65? 10/1962 Tripp ..235/154 3,109,09210/1963 Lottetal. ..235/l5l.1lX 3,277,288 10/1966 Hartley ..235/l5l.l1

Primary Examiner-Gareth D. Shaw Assistant Examiner-Melvin B. Chapnick Attorney-Wolfe, Hubbard, Leydig, Voit & Osann ABSTRACT A numerical path control system including a time shared digital computer generating for each of a plurality of axes regularly recurring numerical excursion commands. A two axis system is shown to be capable of deriving from a small number of data words successive straight line path or circular arc path command signals at a rate of 50 times a second and of converting these into intennediate or secondary command signals which are applied to the servos of the machine axes at a rate of 500 times a second.

82 Claims, 106 Drawing Figures PATENTEDAFR H 1912 3.656.124

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sum 19m 76 JOHN K. MCGEE

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3058657 *Sep 11, 1957Oct 16, 1962Inductosyn CorpVariable speed drive interpolation system for automatic machine control
US3109092 *Dec 27, 1960Oct 29, 1963Licentia GmbhDigital curve computer for use in controlling the path of a work tool or work piece
US3277288 *Feb 19, 1962Oct 4, 1966Emi LtdAutomatic control mechanism for machine tools
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3842330 *Aug 9, 1972Oct 15, 1974Giddings & LewisMethod and apparatus for numerical control of members independently movable along coincident axes
US4041287 *Sep 8, 1976Aug 9, 1977Giddings & Lewis, Inc.Final servo control in NC systems
US4509126 *Jun 9, 1982Apr 2, 1985Amca International CorporationAdaptive control for machine tools
US4547847 *May 26, 1983Oct 15, 1985Amca International CorporationAdaptive control for machine tools
US4914364 *Oct 22, 1987Apr 3, 1990Mitsubishi Denki Kabushiki KaishaNumerical control apparatus
US5520077 *Jan 26, 1994May 28, 1996Lindstrom; Conrad B.Numerically controlled contouring head having translation of axial spindle movement into radial cutting edge movement
US7245100 *Nov 16, 2006Jul 17, 2007International Rectifier CorporationMulti-axis AC servo control system and method
US7529599 *May 25, 2004May 5, 2009Rockwell Automation Technologies, Inc.Systems and methods for coordination motion instructions
US8000818May 4, 2009Aug 16, 2011Rockwell Automation Technologies, Inc.Systems and methods for coordination motion instructions
US8024068 *Aug 3, 2007Sep 20, 2011Hurco Companies, Inc.Machine tool control system
US8250952 *Dec 11, 2006Aug 28, 2012Renishaw PlcMethod of machine tool calibration
US8725283Aug 3, 2007May 13, 2014Hurco Companies, Inc.Generalized kinematics system
US8773427Dec 22, 2010Jul 8, 2014Sony CorporationMethod and apparatus for multiview image generation using depth map information
DE3348159C2 *Jun 1, 1983Dec 17, 1992Giddings & Lewis, Inc., Fond Du Lac, Wis., UsTitle not available
Classifications
U.S. Classification700/275, 318/573
International ClassificationG05B19/37, G05B19/416, G05B19/4103, G05B19/414
Cooperative ClassificationG05B19/371, G05B19/414, G05B2219/34132, G05B2219/34167, G05B19/4103
European ClassificationG05B19/414, G05B19/37C, G05B19/4103