Re: [CAD_CAM_EDM_DRO] Re: Vacuum pump for vacuum chuck?

Chris Horne wrote:

> Edwards Speedivac
>
> I have two, one in use and one as a spare,
> both quite old 240V single-stage, belt drive, sliding vane pumps.
>
> One has a nice vapor trap on the top. Both were bought from eBay, the
> first I bought worked right out of the box, the second required a
> couple of hours strip-down and clean.

I also use an Edwards (2 stage) pump for my vacformer . I don't use a
secondary pump though but do use a vac tank of about 40 litres. That
little pump can pull the tank down to 28" hg (gauge reading) in about 30
seconds.

can be seen in action here http://www.youtube.com/watch?v=fFskUFNI4qA

I also have a smaller Gast pump which I use for fixturing.


Wayne.....