Re: Router plan made from steel

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mina Aboul saad"
<minaf@l...> wrote:

> Hi Dave,
>
> I looked at the Axxus design you mentioned, very well designed.
> I followed your reply regarding design methods for the frame and

the rail

> system for the router, I couldn't agree more, but as you mentioned

I believe

> the material for the table frame won't make a big difference if I'm
> attaching rails to the frame, but I believe the main issue that

remains is

> the material for the gantry itself, I think a special design has to

be made

> for a steel gantry to avoid any kind of beam deflection, specially

if we're

> talking about a relatively big span for the gantry.
>
> BTW I never got the drawings you promised me, my email is minaf@l...
>
> Mina F.

I looked at that too. there are a few ways to look at the basics of
design.

the longer the spread of the bearings, the lesser the racking or
missalignemnt. some have called for 12,18 or 24 inches distance
between the bearings on one side of the table, and powering the
gantry from that side.


I lookwd at a 2"x3" steel box beam seperated with an 8 inch inner
opening. the frame would be welded into a large square so the width
would be 8 inches, plus the 4 inches of the boxes (2inches wide, 3
inches tall)

that way, they would sit on bearings that are about 10 inches apart
or more.

also the arrangement would have the tool sitting inbetween the frame
of the gantry instead of a taller unit. The Y carrage would be
supported under the gantry for cutting forces.

but, since you are talking about a wood router, the pressures are not
nearly as high as would be for cutting metal.

Dave