17 Nov
2005
17 Nov
'05
6:13 a.m.
I've got a system here that had gray foam rubber used as a sound deadener.
Well, after 24 years, it's toast--you touch it and it's gone. No surprise,
right?
What do you folks use to replace the stuff (assuming that I don't want to
put someone through this in 20 more years)? Adhesive-backed wool felt?
Cheers,
Chuck
17 Nov
17 Nov
12:30 p.m.
On Wed, 2005-11-16 at 22:13 -0800, Chuck Guzis wrote:
I've got a system here that had gray foam rubber
used as a sound deadener.
Well, after 24 years, it's toast--you touch it and it's gone. No surprise,
right?
What do you folks use to replace the stuff
You could always take the easy route if it's purely sound deadening and
not bother :) For the usage patterns on a collected machine it's less of
an issue; it's not like the system's running 24x7, and the extra noise
might not be such a problem.
Of course it's worth thinking about construction and determining whether
the material was also there as a heat barrier or an anti-vibration
measure.
Adhesive-backed wool felt?
I don't know for sure - but that sounds sensible. What it'll do after 20
years is anyone's guess. I know the stuff they use in cars seems to have
a lifetime of 20 years or so before it starts to break down (although
it's not total disintegration like the foam used in computers)
Of course 20 years down the line there might be other issues in keeping
the machine operational anyway, such as random IC failure through normal
decay (rather than usage cycles). If the material needs to be replaced
again in 20 years it's perhaps no big deal anyway!
cheers
Jules
4:18 p.m.
On 11/17/2005 at 12:30 PM Jules Richardson wrote:
You could always take the easy route if it's purely
sound deadening and
not bother :) For the usage patterns on a collected machine it's less of
an issue; it's not like the system's running 24x7, and the extra noise
might not be such a problem.
It's in the carriage box of a dot-matrix printer. Definitely
sound-deadening, as I've seen the same model, only earlier production,
without foam. I'll just clean the old stuff off and otherwise leave things
alone. Better bare metal than another round of some deteriorating
substance later.
Cheers,
Chuck
2:27 p.m.
I've got a system here that had gray foam rubber
used as a sound deadener.
Well, after 24 years, it's toast--you touch it and it's gone. No surprise,
right?
At least it does not turn to a sticky mess like some foam.
What do you folks use to replace the stuff (assuming
that I don't want to
put someone through this in 20 more years)? Adhesive-backed wool felt?
You can buy sheets of new foam of various grades and thicknesses, then
chop it to fit. Use an electric carving knife for custom fits. The modern
stuff os very likely far more stable over the years.
William Donzelli
aw288 at osfn.org
6991
days inactive
6991
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