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