Title:
POSITIONING SYSTEM
Document Type and Number:
Japanese Patent JPS5943411
Kind Code:
A
Abstract:
PURPOSE:To eliminate an error due to the hysteresis of a stepping motor and to prevent a positioning shift to a normal or reverse direction by reversing the stepping motor by one step and positioning it for its movement in a specific direction. CONSTITUTION:The stepping motor 1 rotates at a specific pitch and a steel band 3 wound around the capstant 2 of the motor 1 is unwound to put a carriage block 60 in linear motion along guide arms 16a and 16b. A magnetic head 19 attached at one end of the block is positioned on a desired track 6 on a disk 4 by said linear motion. Thus, the magnetic head 19 is positioned at the desired position N by utilizing a forward and a backward positioning shift due to the hysteresis of the motor 1 for position corrections and in this case, the motor is moved to a position (N+1) one pitch ahead of the desired position N and then moved backward by one pitch to be positioned at the desired position N.
Inventors:
MORIBE YOSHIHIRO
HAYASHI YUKITO
MITAMURA MASAHIRO
HAYASHI YUKITO
MITAMURA MASAHIRO
Application Number:
JP15272382A
Publication Date:
March 10, 1984
Filing Date:
September 03, 1982
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G05D3/00; G01B21/00; G11B5/55; (IPC1-7): G01B21/00; G05D3/00
Domestic Patent References:
| JPS52156324A | 1977-12-26 | |||
| JPS5765298A | 1982-04-20 | |||
| JPS56134000A | 1981-10-20 | |||
| JPS5773971A | 1982-05-08 | |||
| JPS4997185A | 1974-09-13 | |||
| JPS51119487A | 1976-10-20 | |||
| JP48049494B | ||||
| JPS5224684A | 1977-02-24 | |||
| JPS5311458A | 1978-02-01 |
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)