Positional determination device using a stepping motor

Details Positional determination device using a stepping motor Positional determination device using a stepping motor

1998-08-28

2000-04-18

Ro, Bentsu

Electricity: motive power systems

Open-loop stepping motor control systems

318685, 318 11, 477 46, H02P 808, F16H 918

Patent

active

060519509

ABSTRACT:
A positional determination device which is drived according to the pulse signals output to a stepping motor 1 and displaces a nut 2 to a position corresponding to the degree of rotation. In order to adjust the initializing position of a feed mechanism, the stepping motor 1 is rotated and the nut 2 displaces until it reaches the limiting position (LimA) defined by the stopper 3a. When initializing, the pattern of temporarily stopping the stepping motor 1 for a period corresponding to a pulse number (N2) at each pulse number (N1) and rotating is repeated. As a result the rotations of the stepping motor 1 become gentle and even if the nut 2 were to collide with the stopper 3a at the limiting position, the reverse rotation of the stepping motor 1 can be prevented and accurate adjustment of the initializing device can be performed.

REFERENCES:
patent: 4871954 (1989-10-01), Rathgeber
patent: 4908017 (1990-03-01), Howson et al.
patent: 5538483 (1996-07-01), Kobayashi et al.
patent: 5624349 (1997-04-01), Yamamoto

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