Appeal No. 1998-0821
Application 08/175,319
20. A method for carrying out servo operations in a disc drive for controlling
the movement and position of a servo head in relation to servo tracks on a
servo surface of a rotating disc of the disc drive, wherein the disc drive
includes a servo circuit connected to the servo head for generating servo
information representative of the location of the servo head with respect to
the servo surface, actuator means for repositioning the servo head in
response to a correction signal received by the actuator means, a servo
microcomputer programmed to periodically input servo information from the
servo circuit and output a correction signal to the actuator means in relation
to the servo information, a system microcomputer programmed to provide
servo commands for selected servo operations to the servo microcomputer,
the method comprising:
storing a plurality of servo routines, corresponding to the servo
commands, in the servo microcomputer for generating the correction signal
from the servo information utilizing preselected servo parameters
comprising at least one of system configuration data and timing data;
storing the servo parameters in the system microcomputer, the
system microcomputer being separate from the servo microcomputer; and
transferring the servo parameters from the system microcomputer to
the servo microcomputer when a servo command is issued to the servo
microcomputer.
The Examiner relies on the following references:
Malka et al. (Malka) 4,879,642 Nov. 07, 1989
Franklin et al. "Digital Control of Dynamic Systems", 2nd edition, published
by Addison-Wesley Publishing Company (MA) (1990), pp. 652, 703-709
and 779-783. (Franklin).
Claims 20 and 21 stand rejected under 35 U.S.C. § 103 as being unpatentable
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