Head moving apparatus using stepping motor

Details Head moving apparatus using stepping motor Head moving apparatus using stepping motor

1985-03-29

1986-09-16

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

318685, 318696, 360 77, G11B 2108, H02K 2904

Patent

active

046125884

ABSTRACT:
A head moving apparatus using a stepping motor which comprises a reversible stepping motor for moving a head and a motor drive control apparatus for driving the stepping motor in alternate forward and reverse directions through switching of excitation phases of the motor after the motor has been driven in one direction, thereby eliminating errors of the step position of the stepping motor due to a hysteresis characteristic thereof. The head thus can be stopped at the same position irrespective of whether it is accessed in the forward or reverse direction.

REFERENCES:
patent: 4356522 (1982-10-01), Takano et al.
patent: 4423447 (1983-12-01), Nishida et al.
patent: 4437049 (1984-03-01), Tullos et al.
patent: 4489259 (1984-12-01), White et al.
patent: 4490662 (1984-12-01), Moribe et al.

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