Re: Need a vacuum system for acrylic sheets

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "kdoney_63021"
<kdoney_63021@y...> wrote:

>
> I have tried small vacuum pumps, with no success. I have even tried

a

> shop wet dry vac with no success. Has anyone used a venturi system
> for large sheet work? I am using bullet catches through MDF

(atually

> melamine) with about an inch of vacuum space. Is there a better

way.

> I would be interested in purchasing a system if I could find one

that

> would work with Bob Campbell's gantry design (low to the ground).

Look at the cut path. if you can cut in such a manner as to have a
section done, you can then lay a plastic sheet over that area.

the biggest problem is that the cut area is an open window. at some
point, there is no vacuum that will work.

Considder that a 1/4 inch cutter on a 12" line has an open area of 3
square inches. that is like a 2 in open pipe. you could not afford
to run a pump that could maintain a vacuume on such an opening.

The better method is to make a sacrifical part with large spaces
under the non-cut areas. Then the cut lines are not open to the
vacuume.

Dave