Re: [CAD_CAM_EDM_DRO] Re: What's better, extruded heatsinks or machines heatsinks?

I'm not sure about possible new additions, (it's been a while), but the zinc
stuff we used to use is plain old zinc oxide.

Bill

On Sat Feb 16 11:49:47 2002, fast1994gto, <beking@...> wrote:

>I doubt there is a measurable difference all other things being equal.
>
>You require a good thermal contact between the heatsink and the heat
>source. A conservative amount of compund is all that is required
>since its prupose is to fill in the microscopic peaks and valleys of
>the mating surfaces. Silver paste is great but others work well too.
>
>Copper takes heat away better, but aluminum dissipates heat better.
>The best heatsinks I have used have a copper contact area mated to an
>aluminum sink. That's getting to be overkill for the Geckos unless
>you are running them at the ragged edge of their capacity.
>
>I run my Geckos at 2A without heatsinks (although they do mate
>against the wall of a thin metal case, and I did use zinc heatsink
>compound) and they are barely get warm to the touch even after
>extended use.
>
>
>Barry

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