Automatic adjustment method and system for servo motor circuit o

Details Automatic adjustment method and system for servo motor circuit o Automatic adjustment method and system for servo motor circuit o

1990-01-03

1991-11-05

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7802, 318561, 318609, G11B 555, G11B 5596, G11B 1300

Patent

active

050634542

ABSTRACT:
An automatic adjustment system for a servo circuit of a magnetic disk apparatus having a magnetic head, a position signal preparing circuit, a speed control unit, and a position control unit. An automatic adjustment method includes monitoring a core width adjustment of the position signal while engaged in a uniform speed seek operation and adjusting a detection sensitivity of the position signal preparing circuit so that an angle of slope of the position signal becomes a predetermined value, measuring a forward/reverse seek operation time of the time between a forward seek operation and a reverse seek operation and adjusting a speed detecting offset of the speed control unit so that a difference between the forward seek operation time and the reverse seek operation time becomes minimal. A position control offset adjustment step is provided for measuring an integration value of the position signal during position control in a seek operation and adjusting the offset of the position control unit so that the integration value becomes minimal. The steps of counting a seek operation time and positioning adjustment of the seek operation time, adjusting a differentiation gain of the speed control unit so that the seek operation time becomes minimal, integrating the position signal, and adjusting a control current detection gain of the speed control unit so that the integration value becomes minimal, are also performed.

REFERENCES:
patent: 4797756 (1989-01-01), Yoshihara et al.
patent: 4827200 (1989-05-01), Ogura et al.
patent: 4908561 (1990-03-01), Hashimoto
patent: 4954908 (1990-09-01), Sengoku
patent: 4979059 (1990-12-01), Sengoku
patent: 5003415 (1991-03-01), Freeze
patent: 5006770 (1991-04-01), Sakamoto et al.

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