[Novalug] computer stopped w/o trace in logs, probably too hot

[Nino Pereira]

I did the same thing with those big ball bearings that
used to be in cars. They go really fast, and make a nice
siren-like noise. You can also feel the gyroscopic forces
in action.

But, from what I learned since, these professional
mechanics may well be wrong. The ball bearing specifications
are for a combination of speed and load, not for speed
by itself. So, a bearing without load, or with a small
load, can rotate much faster than a bearing that carries
the design load and suffer no shortened life.

If you're really interested let me know, and I'll dig
out the books on those things. Or, you could google for it.

Nino

  Ed James wrote:
> ACK!  Excellent point, which I shoulda thought of, but
> didn't.  I remember something similar, using shop
> compressed air to dry out wheel bearings back when
> I used to clean/repack them with grease some time ago.
> I got yelled at by a pro mechanic for doing that,
> since they were spinning dry at a darn impressive
> speed.
> 
> Ed James
> 
> Quoting "David A. Hammond" <hammonds at erols.com>:
> 
>> Just a suggestion for when you vacuum out (or blow air
>> through) a computer to clean it.
>>
>> First "pin" the fans with a toothpick (small fans like
>> CPU fans) or a screwdriver (large fans like case and
>> power supply fans) to prevent rotation.  Otherwise the
>> powerful blast of air from the vacuum cleaner or air
>> bottle will spin the fans far faster than their normal
>> operating speed.  The bearings are not designed for
>> these speeds and will often suffer permanent damage
>> leading to early failure.
>>
>> I had several premature fan failures (in at least one
>> instance leading to loss of a CPU) before I read about
>> this trick somewhere.  Can't recall having a problem
>> since then.
>>
>> Hope this helps someone,
>> Dave
>>
>> Nino Pereira wrote:
>>
>> < big snip >
>>
>>>
>>> That it now works may well be because I vacuumed out the inside,
>>> including the three fans. One, on the power supply, had stopped
>>> working but after cleaning it did fine again. So, the problem
>>> may have simply been neglect on my part: clean is good,
>>> also for computers.
>>>
>>> Any suggestions on what to do with those sensor measurements
>>> are very welcome.
>>>
>>> Nino
>>>
>>>
>>>
>>>
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