RE: [CAD_CAM_EDM_DRO] Vacuum Table

I would second the high volume low vacuum approach. I don't think I would
use a shop-vac, but would instead invest in a couple HP dust collector. They
are made to run continuous duty and will pull a decent vacuum. The problem
with the lab type pumps is that they can not move much of a volume so even a
little air leak will over whelm them.

Tim
[Denver, CO]

> -----Original Message-----
> Anyone out there ever built a vacuum table for a cnc router? I am
> in the process of building a new larger router and would like to add
> a vacuum part hold down to it. I picked up a couple of vacuum pumps
> at the NC State University surplus today although I am not sure if they
> will work for it yet. They are nice units direct drive high vacuum lab
> units. What I need to know is what size and number of holes would
> I drill in a 4' X 4' table? I will probably add some valves to section
> the table off, possibly go back and get another pump and section it
> into thirds, one pump for each section. Use only the sections I need
> to, depending on the size fo the work. I was thinking of using an acrylic
> sheet maybe 3/4" thick for the table. Will it require a large O-Ring
> around the edge or will just the holes be sufficent? Any tips would be
> appreciated.
>
> Thanks
> Bill
>
>
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