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From: iisakkil@niksula.hut.fi (Mika R Iisakkila)
Newsgroups: comp.os.cpm,comp.peripherals
Subject: Re: How do I align a disk drive?
Message-ID: <IISAKKIL.90Jul15181243@silver-surfer.hut.fi>
Date: 15 Jul 90 16:12:43 GMT
References: <XX00000119@harlie.UUCP>
Sender: news@santra.uucp (Cnews - USENET news system)
Organization: Helsinki University of Technology, Finland
Lines: 13
In-Reply-To: mitch@harlie.UUCP's message of 14 Jul 90 14:43:47 GMT

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.