> -----Original Message-----
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: Friday, March 15, 2019 1:44 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Spindle motor coolant advice needed
> When I had a coolant tank, for a different purpose, I put automatic "anti
> freeze in the water.   It is make just for this purpose and is
> non-corrosive with materials used in car engines.
> Also, if the water recirculates it will eventually warm up.  I put a 12
> volt fan on the tank lid and made it into an evaporative cooler.    Then
> you top off the tank with new water now and then.  If the water is taking
> even 25 watts of heat from the system it will heat up quite a lot unless
> you rig some kind of cooling.

How about using a radiator like
which is intended to cool CPUs? It comes with mountings for three 120mm
muffin fans.

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