3 May
1998
3 May
'98
12:14 p.m.
On Sun, 3 May 1998, Tony Duell wrote:
True, but you might make quite a 'copper splash' with the armature
windings!
- don
I've used
other, larger disk drives (14" CDC drives in particular)
where a magnetic index sensor is used to detect speed. If you attempt
to spin one of these drives up without the sensor operating, they will
go over-speed, but won't self destruct (yes, I've tested this.) After
I have to ask : did you test this on purpose, or did you forget to plug
the sensor in ? :-)
detecting that they apparently haven't spun
up to speed in time, they'll begin
the spin-down sequence.
I guess some problems on the Micropolis 1200 would cause the
microcontroller to think the drive hadn't spun up and then disable the
motor. It's also quite possible that the motor in said drive can't run
fast enough to cause major damage anyway (but I'm not going to try it!)
Same goes for the RL01/RL02 (which will spin about 3000 RPM instead
of nominal if you convince them to spin up without a pack).
Yes, but with no pack there's no platter to break up :-) I'm not going to try it, but what does an RL0x do
if you get it to
overspeed with a pack in place, I wonder? Probably not a lot.
donm(a)cts.com
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Don Maslin - Keeper of the Dina-SIG CP/M System Disk Archives
Chairman, Dina-SIG of the San Diego Computer Society
Clinging tenaciously to the trailing edge of technology.
Sysop - Elephant's Graveyard (CP/M) - 619-454-8412
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Tim.
-tony