13 Sep
2007
13 Sep
'07
3:30 p.m.
Pat said:
On Thursday 13 September 2007, J Blaser wrote:
> Lastly, be cautious around the head actuator. The heads and the
> spindle (plate) are carefully aligned, and I wouldn't remove or
> adjust either of these. Unless, that is, you have the printsets and
> proper tools (which I don't).
Actually, the RL02/RL01 is an embedded servo drive, so
"head alignment"
generally isn't critical, at least like it is with the RK0n drives.
Yes, excellent point.
I was thinking more in terms of the possibility of getting the
horizontal forward/backward 'tilt' a little bit off, that is,
when the heads are on the outer tracks versus when the heads
are extended to the inner tracks, is the flying height the same?
Also, I might add that I removed the platter brushes from
three of my RL01s last year, based on commentary here on the list
and other groups. I'm not sure if RL02s were ever produced with
brushes, but if so, it might be worth checking. The three RL02s
that I have in another PDP-11/23 PLUS never had them.
- Jared
14 Sep
14 Sep
12:53 p.m.
I was thinking more in terms of the possibility of
getting the
horizontal forward/backward 'tilt' a little bit off, that is,
when the heads are on the outer tracks versus when the heads
are extended to the inner tracks, is the flying height the same?
In all DEC hard drives (I think it's 'all'), the flying height is
determined between the balance between the aerodynamic lift (forcing the
head odf the platter) and the head mounting spring (forcing the head onto
the platter). It's not set by having the heads a fixed distance above the
disk and trying to ensure the positioner motion is exactly parallel to
the disk.
-tony
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