Re: [CAD_CAM_EDM_DRO] Re: Need a vacuum system for acrylic sheets

If you are talking about compressed air venturi pumps--they work and they
will generate a good vacuum but they use a lot of air. How much surface
area is the vacuum acting on? How is the vacuum piping done?

----- Original Message -----
From: "kdoney_63021" <kdoney_63021@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, January 12, 2005 5:47 AM
Subject: [CAD_CAM_EDM_DRO] Re: Need a vacuum system for acrylic sheets


>
>
> Sorry, I should have been a little more specific.
>
> I'm actually not cutting the 1/8" acrylic plastic sheet. I am
> painting on it with dispensing valves and acrylic paint. I need to
> hold the sheet flat (+- .1") against the surface of the table. The
> sheets, as they come off the properly constructed storage racks, are
> sometimes off by .5" by warping. I don't need high volume, except to
> counteract the table leakage and I don't need high vacuum since I
> only have 12 of the 1/4" bullet catches which allow the vacuum to
> form inside of my multiple areas of
> "Poron Quick Recovery Foam Strip, 1/8" Thick X 1/2" Wide".
>
> I was thinking that this rubber was the wrong type, causing massive
> leaks when I tried my new Gast vacuum pump but when I put my finger
> over the vacuum inlet it didn't seem that strong so I assumed the
> pump was the problem.
>
> I then tried the wet dry vac and got no better result. Maybe my
>
> "Bullet-Style Spring-Loaded Catch, Nonadjustable Mortise-Mount
> Strike, 1/4"D X 3/8"L"
>
> were too small to allow the vacuum to hold the piece?
>
> Should I just remove the catches and cover the unused holes?
>
> I've heard good things about venturi pumps. Any comments?
>
> Kevin
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Robert Campbell" <bob@c...>
> wrote:
> > Kevin,
> >
> > what are the size of the parts? How many of the same parts would
> you be
> > cutting?
> >
> > What type material are you cutting?
> >
> > Basically you have two types of vacuum systems. One is the high
> vacuum low
> > flow system and the other is the high flow lower vacuum. For the
> high flow
> > system the vacuum should be around 15".
> >
> (snip)
>
>
>
>
>
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