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Path: utzoo!watmath!clyde!burl!mgnetp!ihnp4!houxm!houxz!vax135!cornell!uw-beaver!tektronix!hplabs!sri-unix!David.Anderson@CMU-CS-G.ARPA
From: David.Anderson@CMU-CS-G.ARPA
Newsgroups: net.micro.apple
Subject: aligning disk drives?
Message-ID: <252@sri-arpa.UUCP>
Date: Fri, 20-Jul-84 18:35:00 EDT
Article-I.D.: sri-arpa.252
Posted: Fri Jul 20 18:35:00 1984
Date-Received: Mon, 23-Jul-84 01:48:35 EDT
Lines: 19

I'm having trouble with an Apple disk drive (for an Apple ///, but the
drive is mechanically the same as the Apple ][ drive, just different
electronics).  I suspect that the drive may be out of alignment, but
I'm not really sure.  Can anyone describe the symptoms of a mis-aligned
drive, and tell me how to re-align it (I can probably borrow a scope or
whatever it takes, but I don't know where to start)?

The problem is that the drive sometimes can't reset itself back to
track 0 -- it just gets stuck somewhere and doesn't seem to be able to
get itself back on track.  If I give the head a little nudge until it
clicks back into the grove, then it works fine for awhile.  I think
that when the reset occurs the head is going a little too far, and that
keeps things from getting lined up properly thereafter.

Obviously I don't understand exactly what I'm talking about ... if
someone out there is knowledgeable about disk drives I'd appreciate
some help, pointers to published information, tips, whatever.  Thanks,

--david