Date   : Sun, 15 Jul 1990 16:12:43 GMT
From   : eru!luth!sunic!tut!funic!santra!santra!iisakkil@bloom-beacon.mit.edu (Mika R Iisakkila)
Subject: How do I align a disk drive?

In article <XX00000119@harlie.UUCP> mitch@harlie.UUCP (Mitch Mitchell) writes:

> David - you might also want to check that the drive's rotational speed
> is up to spec.
...
> I used some diagnostic software that came with my computer but an
> o-scope or counter or mabe even seat-of-the-pants adjustment while trying to
> read a good disk would work...

       I too have an old full-height Tandon floppy drive.  It has a
'stroboscope' pattern on this what-ever-it-is-in-English which spins on
the bottom of the drive.  Light it with a mains-operated light bulb
and you can easily adjust the speed accurately enough.