Title:
POSITIONING DEVICE
Document Type and Number:
Japanese Patent JP2015116664
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a positioning device which further properly detects an elongation amount of a ball screw, and can further improve positioning accuracy.SOLUTION: Distance detection means NXS which can detect an axial direction up to a tip of a ball screw NX is arranged at a position apart from the tip of the ball screw by an arbitrary distance being a position fixed to a base table, and temperature detection means SX which can detect a temperature of the base table BS is arranged at the base table BS. A base table reference length K at a reference temperature, and a ball screw reference length A at the reference temperature are stored in control means. Then, by using the base table reference length K, an elongation amount ΔK which is acquired by calculation from the base table reference length K, and a detected temperature, and a detected distance ΔX, a ball screw actual length A+ΔA being a length from a reference position STX up to the other end of the ball screw NX is acquired, and a control amount of a drive motor MX which rotates the ball screw NX for positioning a movable body is corrected on the basis of the acquired ball screw length A+ΔA, and the ball screw reference length A.
More Like This:
Inventors:
SUZUKI KATSUSHI
SAKAI KOICHI
UETAKE SHINJI
TAKAHARA HIROYUKI
NARUSE HIROSHI
SAKAI KOICHI
UETAKE SHINJI
TAKAHARA HIROYUKI
NARUSE HIROSHI
Application Number:
JP2015018214A
Publication Date:
June 25, 2015
Filing Date:
February 02, 2015
Export Citation:
Assignee:
JTEKT CORP
International Classes:
B23Q15/18; B23Q15/24; G05B19/404
Domestic Patent References:
| JPH01109048A | 1989-04-26 | |||
| JPH07246546A | 1995-09-26 | |||
| JPS61297058A | 1986-12-27 | |||
| JP2002273642A | 2002-09-25 | |||
| JP2001138178A | 2001-05-22 |
Attorney, Agent or Firm:
Okada International Patent Office