US4207504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spindle control system
Assignee: Fanuc Corp
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Filing: 1978-09-07
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Granted: 1980-06-10
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Expires: 1998-09-07
Abstract
Abstract A speed detector produces a spindle speed signal proportional to the revolving speed of a spindle. A specified position detector provides a specified position signal when the spindle assumes a specified rotational position. A spindle motor speed control unit controls the spindle motor so that the motor speed agrees with a speed command. When spindle orientation is requested, one integrator circuit responds to the specified position signal to integrate the spindle speed signal. The output from the integrator circuit is applied to the speed control unit in place of the speed command.
Inventors
- 👤 Shigeki Kawada
- 👤 Yoshiki Fujioka
- 👤 Mitsuhiko Hirota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:41
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/39; B; B23; B23Q; B23Q15/00; B23Q15/20; B23Q15/22; B23Q15/26; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34388; G05B2219/37; G05B2219/37313; G05B2219/37314; G05B2219/42; G05B2219/42104; G05B2219/45; G05B2219/45136; G05B2219/50; G05B2219/50031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A spindle control system in which a spindle motor for driving a spindle has associated therewith a speed detector for producing a speed detection signal proportional to the motor speed and the motor speed is controlled by the speed detection signal to agree with a predetermined speed command signal, said system comprising: a specified position detector for producing a specified position signal when the spindle assumes a specified rotational position during its rotation; and an integrator circuit for integrating the speed detection signal; wherein when to stop the spindle at a predetermined position, the integrator circuit is actuated in response to the specified position signal, and the output signal from the integrator circuit is used, in place of the speed command signal, to achieved positioning control of the spindle.
Claim 2
Dependent Claim
129 words
A spindle control system in which a spindle motor for driving a spindle has associated therewith a speed detector for producing a speed detection signal proportional to the motor speed and the motor speed is controlled by the speed detection signal to agree with a predetermined speed command signal, said system comprising: a specified position detector for producing a specified position signal when the spindle assumes a specified rotational position during its rotation; and an integrator circuit for integrating the speed detection signal; wherein when to stop the spindle at a predetermined position, the integrator circuit is actuated in response to the specified position signal, and the output signal from the integrator circuit is used, in place of the speed command signal, to achieved positioning control of the spindle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |