Apparatus and methods for implementing error correction in real

Details Apparatus and methods for implementing error correction in real Apparatus and methods for implementing error correction in real

1993-03-01

1994-12-20

Mai, Tan V.

Boots, shoes, and leggings

G06F 1546, G06G 764, G06G 766

Patent

active

053750667

ABSTRACT:
Methods and apparatus for performing error compensation by modifying encoder-type position feedback signals supplied to a machine tool controller is illustrated by four embodiments. The first embodiment inserts compensation pulses into position feedback signals by using OR gates, when both square waves of the feedback signals are logically low. The addition or subtraction of the compensation pulses is performed by inserting the compensation pulses at a particular phase relative to each other. The second embodiment is capable of inserting correction pulses when the square waves are in any logical state. The third embodiment is capable of correcting the error completely controlling the feedback signals and not using OR gates to insert correction pulses, but requires a faster microcomputer. The fourth embodiment uses inverters incorporated sequentially, instead of OR gates, to invert the square wave signals before they are supplied to the machine tool controller. An additional feature is a gate control circuit which holds the incoming signals in the current state to prevent the signals from changing during the correction process. When the correction process is completed, the incoming signals are enabled.

REFERENCES:
patent: 3308279 (1961-09-01), Kelling
patent: 3849712 (1974-11-01), Lankford et al.
patent: 4096770 (1978-06-01), Tanner
patent: 4140953 (1979-02-01), Dunne
patent: 4502108 (1985-04-01), Nozawa et al.
patent: 4514813 (1985-04-01), Nozawa et al.
patent: 4750104 (1988-06-01), Kumamoto et al.
patent: 4775926 (1988-10-01), Hasegawa et al.
patent: 4866643 (1989-09-01), Dutler
patent: 4902951 (1990-02-01), Ohta et al.
patent: 4942611 (1990-07-01), Kunugi et al.
patent: 4974165 (1990-11-01), Locke et al.
patent: 4983899 (1991-01-01), Komatsu et al.
patent: 5083280 (1992-01-01), Yamamoto et al.
patent: 5095788 (1992-03-01), Matoni
patent: 5101146 (1992-03-01), Teshima
"Implementing Fast Part Probing and Error Compensation on Machine Tools", Kenneth W. Yee et al., NISTIR 4447, Oct. 1990.
"A Generalized Mathematical Model for Mahine Tool Errors", by M. A. Donmez et al., reprinted from Modeling, Sensing and Control of Manufacturing Processes-PED-vol. 23/DSC-vol. 4, pp. 231-243.
"A Real-Time Error Compensation System for a Computerized Numerical Control Turning Center", by M. Alkan Donmez et al., IEEE Computer Society Reprint, Reprinted from Proceedings of the IEEE International Conference on Robotics and Automation, San Francisco, Calif., Apr. 7-10, 1986.
"Alternative Designs of a Real-Time Error Corrector for Machine-Tools with Encoder Position Feedback", by Kenneth W. Yee, NISTIR 4832, Apr. 1992.
"Automated Compensating of Part Errors Determined by In-Process Gauging", by Kenneth W. Yee et al. NISTIR 4854, Jun. 1992.

Affiliated with

Also associated with

Rating

Apparatus and methods for implementing error correction in real does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and methods for implementing error correction in real , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and methods for implementing error correction in real will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2389124