Re: [CAD_CAM_EDM_DRO] flat glass wasRe: re:Levelling large table

Getting back to CNC router tables a sec-

I plan to make do with spoilboard over steel tubing for the latest machine.

In the past I have made torsion box beds with aluminum skin
over an I beam frame as well as thick tooling plate. The torsion
boxes worked well but were not good for vacuum holdowns.

Last year I checked out on a small limited aerobatic airplane
(I am a pilot) that had as I understand aluminum wing skins
epoxy bonded to an aluminum honeycomb core. The structure was incredibly
light and stiff. Glued aluminum sounds scary
but hey- I'm not dead!

So I have thought of a table that has say a quarter inch skin
on the bottom resting on pads milled in place...

A core epoxied to that and also milled in place (hexagonal
close packed metal rings comes to mind)...

And a top quarter inch skin epoxied to that.

It would be light , stiff, and multiple vacuum holes drilled through would
not leak into each other.

I have also looked with interest in the wing construction of the old b-17.
It looks like the metal equivalent of corrugated cardboard. I think you can
buy this stuff.

Just some thoughts.
Oh and I think glass has too much short term order to be considered a thick
liquid. I think this can be shown with
differential calorimetry.

Leslie Watts
L M Watts Furniture
Tiger, Georgia USA
http://www.rabun.net/~leswatts/wattsfurniturewp.html