Re: DIY Router Design questions ?

That's interesting Art,
my Roland CNC engraver uses a wire and pully system and is fast and
fairly accurate and seems to be holding up well. I was'nt sure how
the approach would scale up, but I'll take a closer look now.

Engraving floors eh ? I'll do a search and see if I can find some
photos.

Thanks,
Rab

--- In CAD_CAM_EDM_DRO@y..., "Art Fenerty" <fenerty@h...> wrote:
> Hi Rab:
>
> I too , have seen X and Y as the Gantry movement. I use Y as
the Gantry
> myself, but I suppose its really moot, just a matter of rotating
the job. I
> see what you mean about the under connections affecting your work.
I have
> seen a system which clamps to a floor with suction cups to engrave
wooden
> floors, wire ropes work very well for keeping the gantry from
skewing under
> this type of system. The one I saw had 4 large suction cups at the
corners ,
> linear slides on the sides , and wire ropes which go from the
Gantry around
> pulleys to the other side. Tighten the wire ropes, and you get no
more skew.
> You could even use wire ropes as the drive mechanism. I use a
pulley from my
> sailboat, myself. Wrap a wire rope twice around the epoxy pulley
which is
> rounded concave on its surface and the system will drive with zero
backlash
> and will surprise you with its accuracy. Replace the pulley (around
5 bucks)
> every 1000 hours or so of cutting and its a good cheap alternative
to
> worrying about rack/pinion, etc. If you have to have wire ropes for
de-skew
> anyway, might as well use them for drive.
>
> Just a thought,
> Art
> ----- Original Message -----
> From: <rab@r...>
> To: <CAD_CAM_EDM_DRO@y...>
> Sent: Sunday, August 12, 2001 7:11 AM
> Subject: [CAD_CAM_EDM_DRO] Re: DIY Router Design questions ?
>
>
> > Thanks everyone for the comments,
> >
> > As for the gantry approach, I was thinking that it may be
possible to
> > clamp the whole router onto larger bits of timber and cut straight
> > down onto those if I could only keep the design free from
connections
> > going from one side to the other which in most designs go "under
the
> > table" I don't know whether I'd use this capability often, but it
may
> > be useful for bigger jobs requiring just X,Y,Z cutting. (I'll
post a
> > picture if my explanation is lacking.)
> > As for the moving table approach, I see the advantages but I'd
like
> > to be able to keep the work stationary in case I want to set-up
work
> > on one half of the router while it's cutting away on the other
half
> > of it's work area.
> >
> > I'd like to keep the weight of the router head down, would an air
> > driven router give the best power to weight ratio ?
> >
> > What's the consensus of opinion as to which axis is X /Y on a
router
> > as I've seen both X and Y being refered to as the movement
direction
> > of the gantry ?
> >
> > Is backlash not a bigger problem in rack and pinion ?
> >
> > Thanks again,
> >
> > Rab,
> >
> > PS. Art, your splash screen is just too fast to study :)
> >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >
> > Post messages: CAD_CAM_EDM_DRO@y...
> > Subscribe: CAD_CAM_EDM_DRO-subscribe@y...
> > Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@y...
> > List owner: CAD_CAM_EDM_DRO-owner@y..., wanliker@a...
> > Moderator: jmelson@a... timg@k... [Moderator]
> > URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> > bill,
> > List Manager
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >