US Patent: 3,866,179
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Numerical Control With Envelope Offset and Automatic Path Segment Transitions
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Patentee:
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John K. McGee (exact or similar names) - Houston, Harris County, TX |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Sep. 22, 1972 |
Granted: |
Feb. 11, 1975 |
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Joel Havens "Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
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Description: |
Abstract:
Numerical control for machine tools and the like of the genus described in McGee U.S. Pat. No. 3,656,124. Improvements are here described for digital computations and control which cause a tool or cutter to follow successive path segments programmed in workpiece edge coordinates, even though the servos operate to control the motion and positioning of the center of a cutter having a finite and unforeseeable radius. Additionally, automatic smooth transitions from segment to segment of the path are effected with a tangent fillet machined on the workpiece which has a radius equal either to that of the cutter or a value which is designated as a single numerical value in the program command data. |
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