EP0139769A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
System of detecting absolute position of servo control system
Assignee: Fanuc Corp
•
Filing: 1984-04-11
•
Granted: —
•
Expires: 2004-04-11
Abstract
Abstract In a method of detecting the absolute position of a servo control system which is controlled according to, for example, a numerical control program, the rotational ratio between a resolver (106) and an absolute encoder (110) which rotate together with a servo motor (105) is set at a predetermined value, and the absolute position of an operating shaft is detected with a high accuracy from rotational outputs of both the resolver (106) and the absolute encoder (110). It is possible to detect the absolute positions of a plurality of operating shafts by using a single detection circuit in common.
Inventors
- 👤 Kenichi Toyoda
- 👤 Hideo Miyashita
- 👤 Shinsuke Sakakibara
- 👤 Hatsumi Toyoda Daiichi-Corporasu 503 Naruo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 17:48
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/244; G01D5/245; G01D5/2454; G01D5/2458; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/39; G05B2219/00; G05B2219/30; G05B2219/37; G05B2219/37175; G05B2219/37297; G05B2219/37471
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
An absolute position detecting system for a servocontrol system for servo-controlling a servomotor for driving operating axes, comprising: resolvers and absolute encoders both adapted to detect rotational positions in accordance with the revolutions of respective servomotors of a plurality of operating axes and to revolve at a ratio of 1 : m; a detecting circuit for detecting absolute positions from the detected outputs of said resolvers and the detected outputs of said absolute encoders; and a switch so provided for switching to connect the plural resolvers and absolute encoders for the respective operating axes with said detecting circuit that said detecting circuit is used commonly among said plural operating axes.
Claim 2
Dependent Claim
110 words
An absolute position detecting system for a servocontrol system for servo-controlling a servomotor for driving operating axes, comprising: resolvers and absolute encoders both adapted to detect rotational positions in accordance with the revolutions of respective servomotors of a plurality of operating axes and to revolve at a ratio of 1 : m; a detecting circuit for detecting absolute positions from the detected outputs of said resolvers and the detected outputs of said absolute encoders; and a switch so provided for switching to connect the plural resolvers and absolute encoders for the respective operating axes with said detecting circuit that said detecting circuit is used commonly among said plural operating axes.
Claim 3
Dependent Claim
31 words
An absolute position detecting system according to Claim 1, wherein the revolving ratio of 1 : m of said resolvers and said absolute encoders is selected such that m > 1.
Claim 4
Dependent Claim
43 words
An absolute position detecting system according to Claim 1 or 2, further comprising a memory circuit for setting the edge-detected outputs of the detected outputs of said absolute encoders so that said servomotor may be stopped by the output of said memory circuit.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.