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3 4 - 6 .
Check o f Disk F b t a t i o n Speed
Disk r o t a t i o n speed
is set
t o 300rpm
for FD-sSBR/FR
and 360rpm
for
FD-
5 5GR.
(A)
Equipment
(1)
SKA
or
u s e r ' s system
( 2 ) Frequency c o u n t e r ( n o t r e q u i r e d when an
SKA
i s usm.%~
( 3 ) Work d i s k
(B-1)
Check procedure (General method)
(1) Connect a frequency c o u n t e r t o
- 1
(Index) on t h e
PCBA
MFD
c o n t r o l or
t o t h e INDEX i n t e r f a c e s i g n a l l i n e .
( 2 ) I n s t a l l a work d i s k and s t a r t t h e s p i n d l e motor.
( 3 ) S e t t h e head t o t r a c k
00.
( 4 )
Execute t h e head loading.
(5) Confirm t h a t t h e p u l s e i n t e r v a l a t TP1 or a t t h e INDEX i n t e r f a c e i s
withon t h e following range.
Index i n t e r v a l , FD-55BR/FR:
200
f
3msec
FD-55GR: 166.7
f
2.5msec
-
3422
-
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