3 Jul
2007
3 Jul
'07
1:26 p.m.
From: Jules Richardson <julesrichardsonuk at
yahoo.co.uk>
---snip---
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?
Hi
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.
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.
The motor is usually on a slotted mount to adjust tension.
The belt can be flipped over if it shows too much deforming
from the crowned pulley.
Dwight
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3 Jul
3 Jul
3:05 p.m.
dwight elvey wrote:
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.
From: Jules Richardson <julesrichardsonuk at
yahoo.co.uk>
---snip---
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?
Hi
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. 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!)
cheers
Jules
7:47 p.m.
From: Jules Richardson <julesrichardsonuk at
yahoo.co.uk>
----snip---
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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dkelvey＠hotmail.com -
julesrichardsonuk＠yahoo.co.uk