Re: [CAD_CAM_EDM_DRO] Re: PC dust issues

It should make no difference to the cooling if you pull air out the top
or push air in the bottom. The net air flow is the same.

I agree that you should try to extract as much dust as possible as close
to the source as possible. However no matter how careful you are some
dust will always escape. I am not sure how important it is to keep the
air inside the computer clean though. My previous employer has a CNC
router and the control computer has no filtration. After 3 years hard
use it is thick with dust inside but that does not seem to affect it any.

The most efficient method of dust collection from a router is to use a
circular hood at least 10" diameter with the router in the middle and a
brush strip round the outside. The waste flies off a router at such a
high velocity (often over 10m/sec) that you need to allow it some room
to decelerate before trying to catch it.

Les

>
>Two schools of thought, Blowing air in assures you that you are
>getting outside air to cool with.
>sucking air out assures you that you are removing hot air.
>
>Regardless of how you do it, particulate removal is best done at the
>source where concentratons are highest and efficiencies of removal
>are greatest.
>
>Point of source, or point of generation is best. There are a few
>ways to connect a vacuume to a router and not have it get in the way.
>
>Also particulate removal works best in stages. The big stuff with
>gravity if possible, the floating dust with very low air velocity
>(small fan, larger chamber)
>
>Shop vac's use a vortex to let the larger stuff spin out of the air
>stream, and long stringy stuff to swirl around the center and then a
>filter to catch the very light stuff. The larger the container and
>the slower the swirl, the smaller particles it will catch.
>
>Also, if you have the space, a large wooden frame with some bed
>sheets attached could be the final, very low velocity filter section.
>
>Dave
>If a cluttered shop is the sign of a cluttered mind..
>what is and empty shop the sign of ?
>
>
>ps: I'm going to have to check with Bill and Tim on this being OT.
>It is VERY closly related to building a home machine, and although
>not directly to the CNC nature, it falls extreemly short of machine
>use or commercial......
>
>That said, considder this on a very short leash and keep it as on-
>topic as you can.
>
>Any responses on-list if this being on-or-off topic WILL have this
>end instantly.
>
>
>