18 Mar
2011
18 Mar
'11
12:18 p.m.
Hi all,
this thread has turned up at the right moment...
I'm beginning to resurrect an 11/23 system so I can get stuff off an =
batch of old RL01's & RL02's.
If it hadn't been for the comments about the foam filter, I'd have found =
out the hard way!
The foam was like an exihibit from the Mummy's tomb - just crumbled away =
as soon as it was touched!
Hopefully you caught it before too much of the pre-filter ended up on the
absolute filter.
So, I suppose it's safe to run the drive for a while *without* this =
filter, but is there anything to use as a
short-term substitute?
Unless your computer room is very dusty, it shoudl be safe to run the
drive without it. But having the pre-filter in place will prolong the
life of the absolute fitler.
At one time, I bleive,y you could buy filter material in large sheets for
use in air conditioner,s etc. A piece cut from such a sheet would be
fine. It really isn't that critical
Also, if I leave the head-lock in place, and try to run up the drive =
with a pack, would it run up to speed
so I could leave it to 'purge' the pack before powering-down and *then* =
allowing the heads to load?
It should do (in that the pack has to be up to speed before the heads
even attempt to load, so keepign the heads off the platter with the
trasnport lock would allow the spindle/blower to run without any risk of
the heads loading), but I wouldn't do it/. The reason is tht once the
drive thinks it's safe to load the heads, it will attempt to do so, and
it may just keep passing current throug the stalled positoned motor and
servo amplifier output stages. Whether this will do any damage I don't
lnow, but I don't like it.
I would keep the transport lock in place _and_ unplug the positioner
motor connector from the PSU ('DC Servo' ?) board. That way the heads
can't load, and it can't over-current the motor.
-tony