Robert A Burleson

US Patent:

43653014, Dec 21, 1982

Filed:

Sep 12, 1980

Appl. No.:

6/186869

Inventors:

Jones B. Arnold - Knoxville TN
Robert R. Burleson - Clinton TN
Robert M. Pardue - Knoxville TN

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G06F 1546
G01B 1102

US Classification:

364475

Abstract:

A stable positional reference system for use in improving the cutting tool-to-part contour position in numerical controlled-multiaxis metal turning machines is provided. The reference system employs a plurality of interferometers referenced to orthogonally disposed metering bars which are substantially isolated from machine strain induced position errors for monitoring the part and tool positions relative to the metering bars. A microprocessor-based control system is employed in conjunction with the plurality of position interferometers and part contour description data inputs to calculate error components for each axis of movement and output them to corresponding axis drives with appropriate scaling and error compensation. Real-time position control, operating in combination with the reference system, makes possible the positioning of the cutting points of a tool along a part locus with a substantially greater degree of accuracy than has been attained previously in the art by referencing and then monitoring only the tool motion relative to a reference position located on the machine base.

US Patent:

41287940, Dec 5, 1978

Filed:

Oct 11, 1977

Appl. No.:

5/841087

Inventors:

Robert R. Burleson - Clinton TN

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G05B 1928

US Classification:

318603

Abstract:

An interferometric correction system for a numerically controlled machine is provided to improve the positioning accuracy of a machine tool, for example, for a high-precision numerically controlled machine. A laser interferometer feedback system is used to monitor the positioning of the machine tool which is being moved by command pulses to a positioning system to position the tool. The correction system compares the commanded position as indicated by a command pulse train applied to the positioning system with the actual position of the tool as monitored by the laser interferometer. If the tool position lags the commanded position by a preselected error, additional pulses are added to the pulse train applied to the positioning system to advance the tool closer to the commanded position, thereby reducing the lag error. If the actual tool position is leading in comparison to the commanded position, pulses are deleted from the pulse train where the advance error exceeds the preselected error magnitude to correct the position error of the tool relative to the commanded position.

Address:

4608 Barbara Dr, Knoxville, TN 37918

Phone:

8659510246

VIN:

JM3ER293080195475

Make:

MAZDA

Model:

CX-7

Year:

2008