Re: [CAD_CAM_EDM_DRO] cooling motors simultaneously killing bacteria

Someone a few miles from us got Legionaires recently and it reminded me of
the mist or flood thread. There was a worry Legionaires might take up
residence in mist systems, I'm just wondering though, would it actually be
capable of living in cutting fluid or an oil mixture? If anyone is worried
to the point of not using mist because of Legionaires you could consider
pumping the fluid from a metal can and using an one of those heating
elements you get for heating a cup of tea / coffee in your car to heat the
fluid past 80 deg. C or so a few hours before you start working (So it has
time to cool down again). I suppose you could even put it on a timer so you
could have it heat the fluid every night. And if tha fails, use toilet duck
in the tank. :)

Regards,
John

----- Original Message -----
From: "Tim Goldstein" <timg@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, April 29, 2001 11:07 PM
Subject: RE: [CAD_CAM_EDM_DRO] cooling motors simultaneously killing
bacteria


> Doug,
>
> I have been pondering this and think there are some problems.
>
> 1 - While most steppers are rated to 100 degrees C, most of us don't run
> them that hot so cooling is not a big issue.
> 2 - Unless you work it out very carefully you would likely not heat the
> coolant enough to kill the bacterial, but just enough to help it grow.
> 3 - If you did get the coolant hot enough to kill the bacteria you would
> have some pretty dangerous fluid being pumped on your work and the heat
> would distort the part being cut. Can't imagine what it would be like to
> have some 70 or so C coolant splash on me when I was cleaning some chips
> during a cut.
> 4 - The hot coolant would probably be unhealthy what with the cutting oil
> vapors you would now be producing.
>
> I think I will stick with air cooling on my steppers.
>
> Tim
> [Denver, CO]
>
> P.S. What is the status on your Series II?
>
> > I understand that stepper motors can get up to 100 degrees C
> > (212 Fahrenheit) working temperature. To keep them cooler
> > (or work them harder at the same temperature), has anyone
> > thought of cooling the motors with the coolant (thereby heating
> > the coolant up and killing any bacterial growth).
> >
> > Because you don't want the coolant to evaporate at the higher
> > temperatures, you'd probably want to keep the coolant within
> > (say) copper lines around the motors, and perhaps even leading
> > to a radiator cooled by a fan, before finally being drained back
> > into the sump.
> >
> > Doug Fortune
> > http://www.cncKITS.com
> > FAQ: http://www.ktmarketing.com/faq.html
>
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