Re: extrusions and "potting"

Marcus,
Check out " www.kleinbauer.com " John has
designed CNC machines using scrap pieces of store front
aluminum channel. He is now working on a simple rotary axis
table.

Bob

--- In CAD_CAM_EDM_DRO@y..., "Marcus & Eva" <implmex@a...> wrote:
> Hi All:
> That was what I had in mind when I got into this thread.
> If I recall correctly, the intent was to be able to cobble
together a
> workable motion control system without access to a machine shop,
hence the
> notion was raised that extrusions would be desirable if only the
hole sizes
> were.... etc, etc.
> Smoke, I understand completely, your point that a superior part can
be
> produced more cheaply by casting and machining, but I am still
considering
> the case where there ain't nuthin' more than a rusty drill press
and a
> hacksaw to work with.
> Within those constraints, do you think that stock bedding compound
in an
> oversize hole in an extrusion, say squirted in through an access
hole while
> the bearings are pre-assembled on a shaft will have the necessary
> mechanical properties to do the job?
> What's this stuff even like to work with. Can it be injected
through a
> syringe?
> Will it stick to aluminum?
> What kind of mold release do you need so it doesn't stick to the
shaft too.
> I'm thinking, as Randy suggests, that a useable system could be put
together
> with almost NO tools if the material is handleable in the way I
suggest, and
> if it has the mechanical properties to do the job.
> You could build some pretty decent stuff using this "potting"
technique with
> weldments and extrusions, and no need for precision machining, but
only if
> the stuff doesn't crumble and fall out over time.
> Cheers
>
> Marcus
>
> ----- Original Message -----
> From: "Randy Gordon-Gilmore" <zephyrus@r...>
> To: <CAD_CAM_EDM_DRO@y...>
> Sent: Sunday, February 17, 2002 10:03 AM
> Subject: Re: [CAD_CAM_EDM_DRO] extrusion of Linear Bearing pillow
block
> question...
>
>
> > At 10:20 AM 2/17/02 -0700, Smoke wrote:
> The best thing, in the
> > slightly-oversized-hole-with-Loctite case, would be to assemble
the whole
> > carriage/knee/whatever assembly and then Loctite all the bearings
at once,
> > so they at least have half a chance of seeking a common alignment
to the
> > shafts they're to run on.
> >
> > Best regards,
> >
> > Randy