26 Nov
2005
26 Nov
'05
12:48 a.m.
>In particular, we gave up on Micropolis because of
their stubborn
>insistence on using a leadscrew positioner, long after almost everyone else
>went to the faster taut-band. I still have a 96 tpi Micropolis drive that
Is the difference in inertia between the band and the leadscrew really
that significant? I always thought the taught band was indroduced for
cheapness...
And many of the better 3.5" drives went back to a leadscrew mechancism. I
particularly like the Sony ones where you can remove the head carriage
and the stepper/mount assembly and put them back without upsetting the
alignment.
employs
buffered seek (goes not ready while seeking). It also mounts the
drive electronics board and the positioner on the movable part of the disk
clamping assembly. Only the drive motor and tach circuit is mounted on the
stationary drive frame.
The disk that Shugart used while innovative was really bad for repeatability
of position and slooowwww.