Patent US3576979A successfully refreshed from Google Patents.
US3576979A
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US
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Motion monitor system
Assignee: Allen Bradley Co LLC
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Filing: 1968-09-24
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Granted: 1971-05-04
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Expires: 1988-09-24
Abstract
Abstract A system for monitoring the motion of a numerically controlled machine tool to avoid costly errors. The motion command data that is normally supplied to the machine tool is also supplied to the monitoring system. Additionally, data from the machine tool slide transducers representative of the actual machine tool motion are fed back to the monitoring system. Tolerance data are also supplied to the monitoring system. On the basis of the data supplied thereto, the monitoring system continually determines whether or not a sufficient error exists to shut down the machine tool.
Inventors
- 👤 Ronald D Elms
- 👤 Larry D Rice
- 👤 Amiel J Mccall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
CPC Classifications
G; G07; G07C; G07C3/00; G07C3/005; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/406; G05B19/4068; G05B2219/00; G05B2219/30; G05B2219/35; G05B2219/35353; G05B2219/41; G05B2219/41363
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A system for determining whether a machine tool is moving along a commanded path within acceptable limits comprising: means for measuring the increment of motion of said machine tool along each axis which occurs during each of predetermined increments of motion of said machine tool along a selected one of said axis; means for determining the increment of motion of said machine tool along each axis which should occur for each successive predetermined increment of motion along said selected one of said axes; and means for indicatinG whether the difference between said measured increments of motion along each axis and the determined increments of motion exceed established tolerance limits.
Claim 2
Independent Claim
109 words
A system for determining whether a machine tool is moving along a commanded path within acceptable limits comprising: means for measuring the increment of motion of said machine tool along each axis which occurs during each of predetermined increments of motion of said machine tool along a selected one of said axis; means for determining the increment of motion of said machine tool along each axis which should occur for each successive predetermined increment of motion along said selected one of said axes; and means for indicatinG whether the difference between said measured increments of motion along each axis and the determined increments of motion exceed established tolerance limits.
Claim 3
Dependent Claim
63 words
Apparatus as recited in claim 1 wherein said means for measuring the increment of motion along each axis during a predetermined increment of motion along said selected one of said axes includes: feedback transducer means for each axis for producing a pulse for each increment of motion along that axis; and means for accumulating the number of pulses from each feedback transducer means.
Claim 4
Dependent Claim
25 words
Apparatus as recited in claim 1 wherein said selected one of said axes is the one along which the greatest machine tool motion will occur.
Claim 5
Dependent Claim
201 words
Apparatus for determining the accuracy of motion of each of the slides of a machine tool along its axis in response to command data comprising: computer means for generating, responsive to the command data for each slide, signals representative of the number of motion increments each slide should move along its axis relative to a predetermined number of motion increments for the slide along a predetermined axis; feedback transducer means for each of said machine tool slides for generating a feedback pulse for each increment of motion moved in response to command data; means for providing an interval termination signal in response to a predetermined number of pulses from the feedback transducer of the slide moving along said predetermined axis; means for counting the number of pulses provided by said feedback transducers for said axes other than said predetermined axis during an interval whose duration is determined by said interval termination signal; means for comparing the count of the number of pulses provided by each of said feedback transducers during one of said intervals with the signals derived from said command data for each slide by said computer means; and means for determining whether the results of said comparisons are acceptable.
Claim 6
Dependent Claim
201 words
Apparatus for determining the accuracy of motion of each of the slides of a machine tool along its axis in response to command data comprising: computer means for generating, responsive to the command data for each slide, signals representative of the number of motion increments each slide should move along its axis relative to a predetermined number of motion increments for the slide along a predetermined axis; feedback transducer means for each of said machine tool slides for generating a feedback pulse for each increment of motion moved in response to command data; means for providing an interval termination signal in response to a predetermined number of pulses from the feedback transducer of the slide moving along said predetermined axis; means for counting the number of pulses provided by said feedback transducers for said axes other than said predetermined axis during an interval whose duration is determined by said interval termination signal; means for comparing the count of the number of pulses provided by each of said feedback transducers during one of said intervals with the signals derived from said command data for each slide by said computer means; and means for determining whether the results of said comparisons are acceptable.
Claim 7
Dependent Claim
23 words
Apparatus as recited in claim 4 wherein said predetermined axis is the one along which the greatest number of motion increments will occur.
Claim 8
Dependent Claim
64 words
Apparatus as recited in claim 4 wherein each of said feedback transducer means includes means for generating sign signals representative of the direction of motion of a slide along its axis; means for each axis for sensing a change in the sign signals produced by a feedback transducer means; and means responsive to a change in sign signals for providing an interval termination signal.
Claim 9
Dependent Claim
101 words
Apparatus as recited in claim 4 wherein said computer means for generating, responsive to command data for each slide, signals representative of the number of motion increments each slide should move along its axis relative to a predetermined number of motion increments for the slide of a predetermined axis includes means for establishing acceptable motion increment tolerances for the number of motion increments each slide should move along its axis; and wherein said means for determining whether the results of said comparison for each of said feedback transducers is acceptable is responsive to said means for establishing acceptable motion increment tolerances.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |