On Fri, 7 Oct 2005 22:47:10 -0400, "Michael Kennedy"
put finger to keyboard and composed:

Sounds like a good idea, but I don't know where to start with the paper disk
idea. Sounds like what they used to have on the bottom of IBM 5.25 floppy
drives in the early 80's. Befor I was born but I have worked on about every
kind of pc from an 8086 up to today's stuff.

Let's say the FDD spins at 300 RPM. That's 5 revs/sec. Assume mains
frequency is 60Hz. Make a paper disc with 24 sectors alternating black
and white. Assume that at time zero the strobe flash illuminates a
black sector. The next flash arrives 1/60 sec later, at which time the
motor will have rotated through 1/12 (=5/60) rev. This means that the
same image will now be under the strobe, making it appear stationary.

- Mike
"James Sweet" wrote in message
news:KgG1f.6063$Tn5.18@trnddc08...

"Franc Zabkar" wrote in message
...
On Fri, 7 Oct 2005 12:49:49 -0400, "Michael Kennedy"
put finger to keyboard and composed:

I need some tips on how to get a floppy drive working. It is in a
nintedo
disk system it is similar to Quick Disk drives of 20 years ago. Someone
else
already tried replacing the drive belt and it still didn't work. There
is
also a speed adjustment. Does anyone have a service manual for one of
these
floppys. I think the read head (single sided) may be out of alignment. I
know you can use a scope with a service manual to adjust a normal floppy
drive. Any ideas?

- Mike

I think it will be difficult, if not impractical, to attempt a head
alignment without an alignment diskette. As for adjusting the speed,
if you know the target RPM, and if it is a multiple of your mains
frequency, then it should be a simple matter to design a paper strobe
disc that you could attach to the drive motor and watch under a
fluorescent light.


Neon glow lamp works much better.





-- Franc Zabkar

Please remove one 'i' from my address when replying by email.