Machine tool control

Details Machine tool control Machine tool control

1989-08-24

1991-12-10

Atkinson, Charles E.

Boots, shoes, and leggings

36447402, 36447428, 82118, G06F 1546

Patent

active

050723995

ABSTRACT:
A system for machining a piston blank to a predetermined profile includes means for rotating a blank at a predetermined speed and means for moving a tool axially with reference to the blank. Digital processing means receives input data defining the required profile (or part only of the profile if the profile is symmetrical). In response to this data, to digital information on a channel corresponding to the instantaneous angular position of the blank, and to digital data on another channel corresponding to the instantaneous axial position of the tool, the processor outputs digital data defining the required position of the tool in the direction perpendicular to the surface of the blank in order to produce the required profile. The actuator control processor outputs a corresponding digital signal which, via a digital-to-analog converter, drives a tool actuator so as to position the tool correspondingly. The processor also receives digital tool position feedback signals on a channel and an adaptive control loop senses and compensates for changes in the transfer function between the input of the processor and the tool. Sensors sense dimension distortion and temperature changes, respectively, of the blank and produce corresponding compensating changes in the digial output signals.

REFERENCES:
patent: 3595106 (1971-07-01), Pomella et al.
patent: 4206009 (1980-06-01), Kazares
patent: 4577535 (1986-03-01), Klabunde et al.
patent: 4653360 (1987-03-01), Compton
patent: 4817007 (1989-03-01), New
IBM Technical Disclosure Bulletin, vol. 30, No. 12, May 1988, New York U.S., pp. 409-412, "Accurate Velocity Digital Position Feedback System for Robotics and Tool Control".

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