29 Mar
2010
29 Mar
'10
10:18 a.m.
From: Josh Dersch <derschjo at mail.msu.edu>
(As a related aside, is there *anywhere* one can get
hard-sectored 5.25"
floppies these days?)
People have been known to make their own 5 1/4" hard-sectored disks. I
don't remember the details, but the basic idea was to take a 5 1/4" disk
drive to hold the disk, make an index wheel for the holes, add a hole
punch, and then just add time.
29 Mar
29 Mar
10:38 a.m.
On Mon, Mar 29, 2010 at 1:18 PM, Marvin Johnston <marvin at west.net> wrote:
From: Josh Dersch <derschjo at mail.msu.edu>
One thought I had was to take an old 5.25" floppy frame (say an
SA400), replace the DC motor with a stepper, mount a floppy disc, then
drive the rotation so many steps (you'd have to calculate/measure the
pulley ratio), then punch the media. Simple stepper drivers are
inexpensive to buy ($20, say) or make and easy to drive from a
microcontroller or parallel port (or even 555, if you wanted to do it
"old school"). It'd be even "better" to have a laser make the
hole,
but that's a lot of power to be squirting around - punches for mylar
rarely make holes in someone's retina.
If it's too tricky to mount the punch or die in the floppy frame, one
could pulse the media around as required and dot the spot with a
sharpie, then eject the floppy and punch the holes by hand.
-ethan
(As a related aside, is there *anywhere* one can
get hard-sectored 5.25"
floppies these days?)
People have been known to make their own 5 1/4" hard-sectored disks. I don't
remember the details, but the basic idea was to take a 5 1/4" disk drive to
hold the disk, make an index wheel for the holes, add a hole punch, and then
just add time.
5387
days inactive
5387
days old
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