julesrichardsonuk at yahoo.co.uk
Tue Jul 3 17:05:30 CDT 2007
dwight elvey wrote:
>> From: Jules Richardson <julesrichardsonuk at yahoo.co.uk>
>> 1) The hard disk (Shugart SA4008) drive belt seems to have a habit
>> of running 1mm or so out of line at startup, resulting in it rubbing
>> against the chassis beneath the spindle pulley. Once it picks up speed
>> it sorts itself out, but I was wondering whether there's any
>> adjustment in either the spindle pulley or drive motor in order to get
>> it to run a little better?
> This is an indication that the belt is slipping. Three things. Either
> the belt is loose, it has dust on it or the belt has taken a set
> from the crown.
Entirely possible - the first time I powered the machine up (after various
sanity checks, obviously) it worked, but the next time around the belt
actually slipped off. I ended up turning it inside-out as I figured it might
just be getting a little worn and might fare better if turned over. It's not
slipped off since (several cycles later), but I did notice this thing about it
running slightly 'low' at startup.
> You should try cleaning first. If the drive doesn't retract the
> heads, be vary careful to not rotate the disk pull backwards.
> If you do, it will trash the disk if the head is on the disk.
I figured as much from the warning stickers :-)
> The motor is usually on a slotted mount to adjust tension.
Hmm, I didn't notice an obvious tension adjust on this one, but I'll take a
proper look when I see the machine next in a few days. Once it was booted I
got a bit caught up in the coolness of it all :-) (And damn, that machine's
loud with the covers off!)
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