Re: knee mill router

Bob,
On my next cnc system project, I plan to machine metal (e.g.
aluminum). How accurate is your fixed gantry system (or whatever you
name it) as pictured in your campbelldesigns.com site? Can it
machine metal projects and how precise is it? I know the aluminum
extrusion is not very strong, so I plan on using thick mild steel to
provide strength a rigidity. Will the plans of using mild steel and
the fixed gantry design work in creating a cnc system accurate enough
to mill metal as compared with converting a drill press to cnc (using
dovetail X & Y metal tables)?
Thanks,

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Robert Campbell" <bob@c...>
wrote:

> George,
>
> What type of material are you going to machine?
>
> Bob Campbell
> Bob@c...
> www.campbelldesigns.com
> Breakout board
> THC board sets
> CNC router plans
> Stepper Motors
> ----- Original Message -----
> From: "george_barr" <george_barr@y...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Tuesday, March 30, 2004 5:43 AM
> Subject: [CAD_CAM_EDM_DRO] knee mill router
>
>
> > I would like to know the advantages of on CNC mill design over the
> > other. The first machine is a Knee Mill (e.g. drill press

converted

> > to a CNC machine) and the other is where the gantry is stationary

and

> > does not move (see sample picture at the bottom of
> > http://www.campbelldesigns.com). If I want to mill precision

metal

> > projects where precision is very important, how much accuracy

will a

> > Knee Mill provide over the stationary gantry design? Also, what

is

> > the advantages/disadvantages of one over the other?
> >
> > Thanks,
> >
> >
> >
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