Re: Seeking APTEST

["William Garber" <willy46pa@garberstreet.com>]

"Michael J. Mahon" <mjmahon@aol.com> wrote in message P_CdncI-gbb7PvTbnZ2dnUVZ_hGdnZ2d@comcast.com">news:P_CdncI-gbb7PvTbnZ2dnUVZ_hGdnZ2d@comcast.com...
: David C Chiu wrote:
: > Is there a source for Call A.P.P.L.E.'s APTEST software? I have a bunch of
: > floppy drives in need fo head realignment...
:
: That's unusual--Disk ]['s very seldom go out of alignment unless
: tinkered with.  ;-)
:
: Contrary to popular myth, the "banging" against the track 0 cam stop
: that occurs at boot/recalibration time is not harmful to alignment,
: since the alignment is fixed by the angular alignment of the stepper
: motor and the cam, and is "sealed" with dope.  The torque produced by
: the stepper motor is quite low, though noisy.
:
: In the rare event that the dope degrades and constant use causes the
: cam or the stepper mounts to loosen, track alignment can be an issue.
: Severe cam wear could also cause sloppy head positioning, but I've
: never seen a cam with significant wear.
:
: In fact, every Disk ][ drive I've seen that was out of alignment had
: the stepper mount dope seals broken by attempted adjustment.  ;-)

I concur, being I have received, in the past, 2 such drives.
All that was necessary was to place the locking screw back
on the old marks created by them in the first place, and all
was well.

William Garber
Email Address - willy46pa@garberstreet.com
Alt. Email - willy46pa@comcast.net
Web address - http://www.garberstreet.com