US4435771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for numerically controlling a machine tool
Assignee: Fanuc Corp
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Filing: 1981-04-03
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Granted: 1984-03-06
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Expires: 2001-04-03
Abstract
Abstract A system for numerically controlling a machine tool comprising a plurality of machine tools, a plurality of numerical control circuits and a computer as an entirely automatic operation commander device, for carrying out the control of the entire processes of said plurality of machine tools with a central control station.
Inventors
- 👤 Ryoichiro Nozawa
- 👤 Nobuyuki Kiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:06
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/418; G05B19/4181; G05B2219/00; G05B2219/30; G05B2219/36; G05B2219/36169; Y; Y02; Y02P; Y02P90/00; Y02P90/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
273 words
A method for numerically controlling a plurality of machine tools by means of a computer connected in common to a plurality of numerical control circuits, each of which is connected to a different one of said machine tools and each of which has a manual data panel, the operation of said method comprising the steps of: transmitting from the computer to a numerical control circuit a program editing mode signal; deciding first whether or not the mode is suitable; under the condition that the result of the first decision is affirmative, transmitting a manual input data (Ma) from the computer to the numerical control circuit; transmitting a program input awaiting signal from the numerical control circuit to the computer; transmitting a numerical control program from the computer to the numerical control circuit; deciding second whether or not the transmission of the numerical control program is completed; under the condition that the result of the second decision is affirmative, transmitting a signal for switching the mode into the automatic operation mode from the computer to the numerical control circuit; deciding third whether or not the mode is suitable; under the condition that the result of the third decision is affirmative, transmitting a cycle start button signal from the computer to the numerical control circuit; starting an automatic operation of the machine tool; transmitting operation state signals from the numerical control circuit to the computer; monitoring the transmitted operation state signals by the computer; deciding fourth whether or not the operation of the machine tool is completed; and terminating the operation of the machine tool when the affirmative result of the fourth decision is obtained.
Claim 2
Independent Claim
273 words
A method for numerically controlling a plurality of machine tools by means of a computer connected in common to a plurality of numerical control circuits, each of which is connected to a different one of said machine tools and each of which has a manual data panel, the operation of said method comprising the steps of: transmitting from the computer to a numerical control circuit a program editing mode signal; deciding first whether or not the mode is suitable; under the condition that the result of the first decision is affirmative, transmitting a manual input data (Ma) from the computer to the numerical control circuit; transmitting a program input awaiting signal from the numerical control circuit to the computer; transmitting a numerical control program from the computer to the numerical control circuit; deciding second whether or not the transmission of the numerical control program is completed; under the condition that the result of the second decision is affirmative, transmitting a signal for switching the mode into the automatic operation mode from the computer to the numerical control circuit; deciding third whether or not the mode is suitable; under the condition that the result of the third decision is affirmative, transmitting a cycle start button signal from the computer to the numerical control circuit; starting an automatic operation of the machine tool; transmitting operation state signals from the numerical control circuit to the computer; monitoring the transmitted operation state signals by the computer; deciding fourth whether or not the operation of the machine tool is completed; and terminating the operation of the machine tool when the affirmative result of the fourth decision is obtained.
Claim 3
Dependent Claim
22 words
A method as defined in claim 1 wherein the first decision is repeated when the result of the first decision is negative.
Claim 4
Dependent Claim
30 words
A method as defined in claim 1 wherein the numerical control program signal transmission and the subsequent second decision are repeated when the result of the second decision is negative.
Claim 5
Dependent Claim
22 words
A method as defined in claim 1 wherein the third decision is repeated when the result of the third decision is negative.
Claim 6
Dependent Claim
22 words
A method as defined in claim 1 wherein the fourth decision is repeated when the result of the fourth decision is negative.
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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |