US3781629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous control system adapted for a numerically controlled machine
Assignee: Fujitsu Ltd
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Filing: 1972-07-07
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Granted: 1973-12-25
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Expires: 1992-07-07
Abstract
Abstract Synchronous control system adapted for a numerically controlled machine having a gantry construction is arranged such that a movable part of the machine is given a feeding motion by a pair of feed systems driven by a pair of synchronously controlled pulse operated motors and detecting means separately detect manipulated feed quantities of said pair of feed systems provided for said movable part of the machine. As a function of the differential quantity of the manipulated feed quantities of both feed systems, a compensating means generates compensating pulses which are given to a selected one of the feed systems so that the differential quantity of the manipulated quantities becomes zero and both feed systems are synchronized with each other.
Inventors
- 👤 Y Yashimoto
- 👤 H Usami
- 👤 T Okazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:39
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
178 words
A synchronous control system adapted for a numerically controlled machine comprising: a first and second movable member of the machine adapted for synchronized movement in displacement and velocity; a first motor driving said first movable member along a first axis; a second motor driving said second movable member along a second axis; a numerical controller for supplying a common command to said first and second motors; first detecting means detecting data indicative of the amount of movement of said first movable member; second detecting means detecting data indicative of the amount of movement of said second movable member; first compensating means connected to said first and second detecting means for generating a compensating signal as a function of the difference in said detected data of both said first and second movable members, and; feedback means for providing said compensating signal to said second motor so that the movement of said second movable member follows the movement of said first movable member whereby said difference in said detected data of both said first and second movable members becomes zero.
Claim 2
Dependent Claim
178 words
A synchronous control system adapted for a numerically controlled machine comprising: a first and second movable member of the machine adapted for synchronized movement in displacement and velocity; a first motor driving said first movable member along a first axis; a second motor driving said second movable member along a second axis; a numerical controller for supplying a common command to said first and second motors; first detecting means detecting data indicative of the amount of movement of said first movable member; second detecting means detecting data indicative of the amount of movement of said second movable member; first compensating means connected to said first and second detecting means for generating a compensating signal as a function of the difference in said detected data of both said first and second movable members, and; feedback means for providing said compensating signal to said second motor so that the movement of said second movable member follows the movement of said first movable member whereby said difference in said detected data of both said first and second movable members becomes zero.
Claim 3
Dependent Claim
27 words
A synchronous control system adapted for a numerically controlled machine as claimed in claim 1 wherein said first and second axes extend in substantially the same direction.
Claim 4
Dependent Claim
33 words
A synchronous control system adapted for a numerically controlled machine as claimed in claim 2 wherein said first and second detecting means detect actual displacements of said first and second movable members respectively.
Claim 5
Dependent Claim
43 words
A synchronous control system adapted for a numerically controlled machine as claimed in claim 3 wherein said first and second detecting means detect actual rectilinear displacements along said first and second axes as said actual displacements of said first and second movable members.
Claim 6
Dependent Claim
42 words
A synchronous control system adapted for a numerically controlled machine as claimed in claim 1 wherein said first and second detecting means detect revolutions supplied from said first and second motors to the feed systems for said first and second movable members.
Claim 7
Dependent Claim
110 words
A synchronous control system adapted for a numerically controlled machine as claimed in claim 5 further comprising: third detecting means detecting an actual rectilinear displacement of said first movable member along said first axis; second compensating means connected to said third detecting means and said numerical controller for generating a further compensating signal as a function of the difference between the command and the actual rectilinear displacement of said first movable member, and; second feedback means for providing said further compensating signal to said first motor so that the value of said actual rectilinear displacement of said first movable member becomes identical with said command signal from said numerical controller.
Claim 8
Dependent Claim
94 words
A sychronous control adapted for a numerically controlled machine as claimed in claim 1 further comprising: second compensating means connected to said first detecting means and said numerical controller for generating another compensating signal as a function of the difference between said data indicative of the amount of movement of said first movable member and said command from the numerical controller, and; second feedback means for providing another compensating signal to said first motor so that the amount of movement of said first movable member becomes identical with said command from said numerical controller.
Claim 9
Dependent Claim
33 words
A synchronous control system adapted for a numerically controlled machine as claimed in claim 6 wherein said first and second detecting means detect actual displacement Of said first and second movable members respectively.
Claim 10
Dependent Claim
42 words
A synchronous control system adapted for a numerically controlled machine as claimed in claim 6 wherein said first and second detecting means detect revolutions supplied from said first and second motors to the feed systems for said first and second movable members.
Claim 11
Dependent Claim
59 words
A synchronous control system adapted for a numerically controlled machine as claimed in claim 1 wherein said first and second axes along which said first and second movable members of the machine move are directed in the same direction, and further said first and second movable members are physically connected to form a gantry-constructed movable element of said machine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |