Re: [CAD_CAM_EDM_DRO] PC dust issues

At 11:33 AM 1/2/04, Les Newell wrote:

>I would disagree with this. The fans should be pushing air into the
>cabinet not drawing it out. You want a positive pressure in the cabinet
>otherwise dust will be drawn in through mounting holes, cable exits,
>panel joins etc. This is why many filters have mountings that are
>compatible with fan mounting holes.

Having designed and built cabinets for severe duty for a few years, I'll
have to agree with you here. If outside cooling is required, ALWAYS
pressurize the cabinet. Use a good filter or better yet, duct clean air
from an outside source (offices, break room, etc.) and then filter it
before entering the cabinet.
IMO, the best solution is to use a large enough cabinet, then spot cool the
heat producing components. Oftentimes the cabinet has enough surface area
to radiate the heat, as long as you get the air moving around inside.

Hoffman (the enclosure people) has a thermal management program available
for free download, it's good for a quick determination of possible
solutions for any problems.

http://tinyurl.com/2x8t9

Beth