1 Jan
2011
1 Jan
'11
8:12 p.m.
On 1 Jan 2011 at 18:24, Tony Duell wrote:
I then thought that if the offset was close to an odd
multiple of half
the track spacing, then perhaps you could use a drive with twice as
many cylinders nad read the odd rather than even tracks (e.g. use an
80 cylinder 5.25" drive to read a40 cylinder flippy). Alas, that
doesn't work either. IIRC, the side 1 head is offset towards the
spindle, so you can't move the head out far enouth to read the
otuermost sylinders on side 1 of a flippy.
Since we're talking about 5.25" "flippies" (although 8" flippies
existed and were sold by established manufacturers), a Drivetec drive
might do the trick, if one wanted to rework the microcontroller
firmware. Since the Drivetec is essentially a closed-loop servo
system with two motors for positioning (one coarse, the other fine),
it might be possible to hit the opposite-side tracks correctly.
Of course, there aren't many Drivetec drives out in the wild as they
were never very popular.
I also don't know if "half-stepping" the positioner on a conventional
drive would work either, as it would take a rework of the drive
electronics.
--Chuck