Title:
【発明の名称】角度変位較正装置および方法
Document Type and Number:
Japanese Patent JP3388738
Kind Code:
B2
Abstract:
PCT No. PCT/GB92/01653 Sec. 371 Date Apr. 13, 1993 Sec. 102(e) Date Apr. 13, 1993 PCT Filed Sep. 10, 1992 PCT Pub. No. WO93/05360 PCT Pub. Date Mar. 18, 1993.A system for calibrating a rotary table (10) includes an indexing table (20) (which is a Hirth coupling table) and an angular interferometer (100), together with a control (200). The indexing table is mechanically coupled to the rotary table (this being the only connection between the rotary table to be calibrated and the calibration system), and the interferometer is set up to measure rotation of the indexing table. During rotation of the rotary table (10) to a target angle, the control (200) monitors the interferometer reading, and when this reading exceeds a predetermined threshold, actuates a drive motor (240) of the table (20) to counter rotate the table, thereby to maintain the optics (106) of the interferometer in alignment with the laser beams (L2, L3) and thus enable continuous measurement of the position of the indexing table.
Inventors:
Chanie, Raymond, John
Graham, Jeffrey
Graham, Jeffrey
Application Number:
JP50507493A
Publication Date:
March 24, 2003
Filing Date:
September 10, 1992
Export Citation:
Assignee:
Renishaw Transducer Systems Limited
International Classes:
E21B3/04; G01B11/26; G01D5/34; G01D5/38; G01D18/00; G12B5/00; (IPC1-7): G01B11/26; G01D5/38; G12B5/00
Domestic Patent References:
| JP2216401A | ||||
| JP2115720A | ||||
| JP5500864A |
Attorney, Agent or Firm:
Yoshikazu Tani (1 person outside)