Method and apparatus depending on the selected power source for

Details Method and apparatus depending on the selected power source for Method and apparatus depending on the selected power source for

1988-05-27

1990-06-05

Richardson, Robert L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 69, 360 7804, 360 7806, 364 32, G11B 2108

Patent

active

049318896

ABSTRACT:
A control apparatus for controlling the positioning of a head in a recording/reproducing apparatus is provided which comprises a carriage mechanism having a head, a switch for selecting one of a battery and a power source using commercial power source, a driving section for driving the carriage mechanism, in accordance with incoming velocity difference data, by a current which comes from a power selected by the switch, a velocity difference detector for generating the velocity difference data on the basis of incoming target velocity data and current velocity data and for delivering the velocity difference data to the driving section, a current position detector for detecting a current position of the head to produce current position data, a current velocity detector for generating the current velocity data from the current position data from the current position detector and a target velocity generator for generating the target velocity data on the basis of incoming target position data and the current position data from the current position detector and for delivering it to the velocity difference detector. The mode select signal is determined in association with the selection of the switch.

REFERENCES:
Digital Magnetic Recording Technique Trikkeps (transliterated) 1986 1-25 pp. 151 to 157.

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