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Reply to "How To: ERR Cruise Commander With Tethered Bridge for 4-Motor Operation"

@JohnActon posted:

Then I ran across an article on the web where the writer was discussing this very topic and his conclusion was what I had decided from my experiment.  I was trying to find that article tonight but before I did I ran across a related discussion about automobile radiators Aluminum vs Copper.   https://www.researchgate.net/p..._aluminium_or_copper  Read about  1/3 down the page and look for the name Ammar Eqbal, Indian Institute of Technology Patna where he says the best heatsinks are a composite with a copper base and aluminum fins.  I am glad I did the test but to my way of thinking it was a draw.          j

Hi John,

My experience was the exact opposite.  The application was high power IR diode lasers for a medical product.  My choices for heat sinks were:  copper base with graphite fins, all aluminum heat sink, and aluminum base with copper fins. The aluminum base with copper fins was the best choice [for this application].  Please note that the heat sink grease was silver filled and a high speed ducted fan cooled the fins.  Lasers have the nasty habit of thermal runaway when they reach 80~85C.  At a grand a copy I had to get it right.

If you have an interest in copper heat sinks just Google:  Cool Innovations Thermal Systems.

To circle back to the original intent of the question:  yes small heat sinks will help and they can be attached using at least two different ways mentioned in this thread.

Lou N

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
330-757-3020

www.ogaugerr.com
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