Re: Stiffness and Rails

John,

I'm not sure that I understand your question entirely, but here goes:

In a milling machine the y axis is sometimes supported at the
handwheel end only; the short length and leadscrew nut serve to keep
things in adequate alignment and support. (the nut serves as a second
support point)

If you meant structures rather than screws, there are many examples
of "cantilever" type machines; the advantage of which is clearance
for materials or operator... wide belt abrasive machines are
sometimes made this way, as are cnc turret punches.

Hope this helps.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., "johnhe" <johnhe@s...> wrote:
> Why would you use a system with supports only at one end? There is
obviously
> a reason behind it, I can't seem to figure it out though. Could
someone give
> me an example where they've only used one support?
>
> Thanks,
> John H.
>
>
> > gentlemen,
> >
> > Recent comments have piqued my curiosity re. the stiffness of
various rail
> > systems. Let us say the rails are of adequate diameter or cross
section
> in
> > the 3 axis; to what are these (x & y in particular ) rails
mounted? I
> have
> > seen no mention in the list of the foundations or benches if you
will,
> used
> > on such machines and not having any firsthand experience with
them I
> wonder?
> > PJH, N7PXY
> >
> >
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