GB1206592A - Improvements in absolute displacement measuring systems - Google Patents

Improvements in absolute displacement measuring systems

Info

Publication number
GB1206592A
GB1206592A GB2371367A GB2371367A GB1206592A GB 1206592 A GB1206592 A GB 1206592A GB 2371367 A GB2371367 A GB 2371367A GB 2371367 A GB2371367 A GB 2371367A GB 1206592 A GB1206592 A GB 1206592A
Authority
GB
United Kingdom
Prior art keywords
grating
inch
head
encoder
rack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2371367A
Inventor
Leslie James Coates
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB2371367A priority Critical patent/GB1206592A/en
Publication of GB1206592A publication Critical patent/GB1206592A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34746—Linear encoders
    • G01D5/34753—Carriages; Driving or coupling means

Abstract

1,206,592. Digital position encoding. NATIONAL RESEARCH DEVELOPMENT CORP. 22 May, 1968 [22 May, 1967], No. 23713/67. Heading G4H. A device for measuring the relative position of two parts of a machine tool comprises a rigid beam 1 to be mounted on one part and a measuring head 3 moving with the other part movable along the beam, the head having means for scanning an optical grating 11 carried on the beam to provide an electrical output indicating the position of the head within one of a number of short distances (e.g. 1 inch) along the beam and a rotary transducer driven through a pinion from a rack 21 on the beam giving a coarse indication of the position. The grating 11 is mounted over a window 9 in the beam and is scanned by light from lamp 13 and lens 15. The grating has three zones, each sensed by four photo-cells 17. The grating may be reflective instead of transmissive, and formed on the beam itself. Rack 21 drives a rotary encoder giving a decimal indication of each 0À1 inch of travel up to one inch, another encoder indicating inches of travel, and a third encoder indicates tens of inches. These may be as described in Specification 1,206,591.
GB2371367A 1967-05-22 1967-05-22 Improvements in absolute displacement measuring systems Expired GB1206592A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2371367A GB1206592A (en) 1967-05-22 1967-05-22 Improvements in absolute displacement measuring systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2371367A GB1206592A (en) 1967-05-22 1967-05-22 Improvements in absolute displacement measuring systems

Publications (1)

Publication Number Publication Date
GB1206592A true GB1206592A (en) 1970-09-23

Family

ID=10200101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2371367A Expired GB1206592A (en) 1967-05-22 1967-05-22 Improvements in absolute displacement measuring systems

Country Status (1)

Country Link
GB (1) GB1206592A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117601A (en) * 1976-02-10 1978-10-03 Firma Dr. Johannes Heidenhain Gmbh. Longitudinal measuring instrument
FR2492092A1 (en) * 1980-10-10 1982-04-16 Asulab Sa DEVICE FOR REPERTING THE REFERENCE POSITION OF A MOBILE PIECE IN TRANSLATION
EP0131900A2 (en) * 1983-07-13 1985-01-23 Litton Precision Products International GmbH Incremental angular encoder
EP1816534A1 (en) * 2006-02-01 2007-08-08 Dynamic Motion SA Method for programming an electric actuator and electric actuator for carrying out said method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117601A (en) * 1976-02-10 1978-10-03 Firma Dr. Johannes Heidenhain Gmbh. Longitudinal measuring instrument
FR2492092A1 (en) * 1980-10-10 1982-04-16 Asulab Sa DEVICE FOR REPERTING THE REFERENCE POSITION OF A MOBILE PIECE IN TRANSLATION
US4468666A (en) * 1980-10-10 1984-08-28 Microbo, S.A. Apparatus for determining a reference position of a moving member
EP0131900A2 (en) * 1983-07-13 1985-01-23 Litton Precision Products International GmbH Incremental angular encoder
EP0131900A3 (en) * 1983-07-13 1987-10-28 Litton Precision Products International GmbH Incremental angular encoder
EP1816534A1 (en) * 2006-02-01 2007-08-08 Dynamic Motion SA Method for programming an electric actuator and electric actuator for carrying out said method

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees