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Functional Description
7936 and 7937
RECALIBRATE
QSAT-l
STATUS-24
GBDEN.FSEN-O~LCk.OUAD.
AMPEN-l~
BEGIN PULSING NACC (GRADUALLY INCREASING
FROM
J~
TO
le~
DUTY CYCLE) UNTIL SPINL/
SPINH-<) OR T.O.
QSTAT-2
STATUS-2
QSAT-l
STATUS-9
LCK,OUAQ-O
GBDEN-l~WAIT
FOR GBDH GRADUALLY INCREASING NACC DUTY CYCLE
~MONITOR
STABILITY OF ACTUATOR BY STABILITY OF OBDH (ADD DE BOUNCE
PULSES AS
NEEDED)~WHEN
GBDH IS TRUE, MONITOR ACTUATOR STABILITY BY
TRACK CROSSING RATE (DEBOUNCE AS NEEDED)
SPINH/L
TOGGLE
LSB~
t---------. . . . .
WAIT fOR SETTLING
GBDEN-~
CHECK
SPDH/SPDL~
0 I R-O
CALL "BUMP SEEK" (SEEK 2) UNTIL
STE-O OR 50 BUMP SEEKS HAVE BEEN DONE
"BUMP
SEEK"(DIR-l)~"BUMP
SEEK"(DIR-
0) fAIL IF STE DIDN'T APPEAR AND GO AWAY
IN RESPECTHVE ORDER WITH THESE SEEKS
YES
AQUIR.'~WAIT
1 SECTOR
TIME~
AQUIR-o~"PRESENT
TRACK" ,PONST,
QSTAT,STATUS-O
'7t37A7.
FIgure 5-7.
QSAT-l
STAT-28
QSAT-l
STAT-14
ABORT
RETURN
5-41
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