Re: Hot rolled router frame: added note

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Leslie M. Watts"
<leswatts@a...> wrote:
For the grouted

> pads on structural tubing my write-up is in the message archives

of this

> group..
>
> This method is increasingly popular with machine
> builders as no machining (or machining stresses)
> are applied to the structural member. One can
> routinely achieve split thousandth straightness
> over many feet .

Les,
By grouting I assume you mean attaching an add-on strip to the frame
with a gap filling substance such as filled epoxy or maybe
polyester. This never occuured to me and does offer some significant
benefits. The add-on piece doesn't even have to be steel. If you
bolted on aluminum strips on the top and bottom with countersunk
screws (with plastic grout) set between the final rail attachment
points you could probably flatten and square the rail using a mill
cutting one side then the other. When you have cut the entire X
travel slide the cut section on parallels spaced closer than the
ends of the table to cut more of the end. Keep flipping, sliding and
cutting until the whole surface on both sides is cut.

As you are not really doing much to the original tube except
drilling holes you don't cause stress and everything should stay in
line. Neat, I like it. Am I on the right track?

Roger