US4970449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Numerical control apparatus
Assignee: Fanuc Corp
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Filing: 1988-11-21
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Granted: 1990-11-13
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Expires: 2008-11-21
Abstract
Abstract A numerical control apparatus according to the invention has a mode designating interface for deciding a control mode and an interface which receives position and velocity commands, these interfaces being interposed between the apparatus and a servo-processor. A mode for controlling the servomotor is automatically decided internally of the numerical control apparatus. Changeover is possible in which the servomotor is used as a motor for positional control or in order to control rotational velocity in the manner of a spindle motor to achieve continuous rotation.
Inventors
- 👤 Hideaki Kawamura
- 👤 Kentaro Fujibayashi
- 👤 Morimasa Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:49
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/23; G05B19/231; G05B19/237; G05B19/04; G05B19/05; G05B19/056; G05B19/414; G05B19/4147; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34426; G05B2219/41; G05B2219/41409; G05B2219/42; G05B2219/42104; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5153
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A numerical control apparatus for controlling a servomotor of a machine tool having a controlled axis subjected to position control or rotational-velocity control by the same servomotor, comprising: commanding means for forming a position command, velocity command and mode setting signal; first means for designating at least one of a positional control mode and a rotational-velocity control mode for the servomotor; and second means for receiving a position command signal in the positional control mode and the velocity command signal in the rotational-velocity control mode.
Claim 2
Dependent Claim
85 words
A numerical control apparatus for controlling a servomotor of a machine tool having a controlled axis subjected to position control or rotational-velocity control by the same servomotor, comprising: commanding means for forming a position command, velocity command and mode setting signal; first means for designating at least one of a positional control mode and a rotational-velocity control mode for the servomotor; and second means for receiving a position command signal in the positional control mode and the velocity command signal in the rotational-velocity control mode.
Claim 3
Dependent Claim
31 words
A numerical control apparatus according to claim 1, further comprising; programmable machine control (PMC) means for generating and providing another velocity command and another mode setting signal to said second means.
Claim 4
Dependent Claim
62 words
A numerical control apparatus according to claim 1, wherein said apparatus further comprises: memory means for updating and storing the servomotor present position based on position feedback pulses from the servomotor in the rotational-velocity control mode, wherein reference point restoration for re-establishing a coordinate system is unnecessary when making a subsequent changeover from the rotational-velocity control mode to the positional control mode.
References Cited (Backward Citations)
US4080853A
Cited
US4683786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |