Method and apparatus for a numerical control device for controll

Details Method and apparatus for a numerical control device for controll Method and apparatus for a numerical control device for controll

1981-07-14

1984-01-03

Smith, Jerry

Boots, shoes, and leggings

364468, 364167, 364169, 318625, 318567, G05B 19417, G05B 1132

Patent

active

044245696

ABSTRACT:
A method and apparatus for numerically controlling a machine tool having at least two tools which are arranged to move in unison with a constant position relationship with respect to one another, the tools being moved relative to a workpiece in accordance with absolute commands to machine a workpiece in a prescribed manner. A single current position register, comprising a section for storing X coordinates and a section for storing Z coordinates, is provided to store the current position of a first tool. Further provided are arithmetic means, responsive to a command for setting coordinates, for computing the current position of a second tool, as well as pulse distribution means. The method includes the steps of storing the position of the first tool in the current position register prior to machining the workpiece with the first tool, moving the first tool to machine the workpiece in accordance with the current position and an absolute command, computing the current position of the second tool via the arithmetic means in response to the command for setting coordinates to change control from the first tool to the second tool, storing the computed current position in the current position register, and moving the second tool to machine the workpiece in accordance with the content of the current position register and an absolute command.

REFERENCES:
patent: 3763360 (1973-10-01), Nishimura et al.
patent: 3793625 (1974-02-01), Pomella et al.
patent: 3818301 (1974-06-01), Sindelar
patent: 3825731 (1974-07-01), Kobayashi et al.
patent: 4060851 (1977-11-01), Nakatsukasa et al.
patent: 4092720 (1978-05-01), Carey
patent: 4257103 (1981-03-01), Suzuki et al.

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