Re: Dust safety

--- In CAD_CAM_EDM_DRO@yahoogroups.com, John Johnson <johnatl@m...>
wrote:

> I'm enclosing my CNC router, and wondering about dust particles in

the

> air, and the sparks from the motor brushes. I wouldn't want

to "sneeze"

> my case. Is this a hazard I should be concerned about?
>
> Thanks!
>
> Regards,
> JJ

Yes and no, although I have not read about anybody having an
explosion from what you speak of, proper design is easy.

When they build explosion proof buildings, they design an entire wall
and often the roof to blow out. Then they don't put anything where
the explosion will be directed.

A hinged lid will blow up and may just blow back on it's hinges.

A bag will rip open.

'Point of source' is discussed when talking particulate removal and
that is where the concentrations are highest and a smaller fan is
needed to move less air to get the highest removal rates.

Considder a 2 pronged attack. A near cutter exhaust point and a full
enclosure to reduce sound.

Another problem is that you would also need to plan on cleaning all
your screws and rails that are in the enclosure, or plan on directing
the entering air to wash them to prevent dust collection.

Dave