Re: Direction follower ?

Hi Tom,

I assumed a 4th axis controller to swivle the cutter and was hoping
there was a canned program to alter the bit. Much like a vinyl
cutter could use.

Seems that the most common vinyl cutter is the caster type that lets
the cutter drag behind the axis.

I can see that mathematically, is would not be too hard to look ahead
and determine the angle the cutter would need to be but then as you
mentioned, smoothing would help keep the cutter from eratic movement
and allow it to follow the path easily.

Mr. Rab had mentioned cutter speed, this does not have to be fast,
although, I think one could cut at high speeds, espically for
straight lines.

Another benefit is that no curves would be sharp as glass cannot
easily break on a sharp curve, and as far as I know cannot break at
all in true angle, it must be a curve.

I looked at using a water jet, but the cost is way up there, both for
purchase, operation and replacemnt parts.

I guess I'll try different variations of the caster/follower wheel
and see how it works, maybe there is some method of tool path that
will work.

Dave

--- In CAD_CAM_EDM_DRO@y..., "mayfieldtm" <mayfiet@i...> wrote:
> Dave:
>
> I can almost picture the cutter on a swivel like a ball castor on a
> chair.
> You would have to figure out how to compensate the tool path,
because
> the cutting position is offset from the tool holder position.
>
> Then also, If your cutting stain glass, the parts need not be super
> accurate and the cutter/holder offset can be very small and track
> good enough.
>
> The only alternative I see is to mount the cutting wheel directly
> under a rotatable tool holder and rotate the tool holder in the
> direction your moving.
>
> However you do it, you may find yourself writing your own controler
> code.
>
> Tom M.
>
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "turbulatordude" <davemucha@j...>
wrote:
> > Hi Brian,
> >
> > Thanks,
> >
> > I too know that you cannot cut rectangles without lifting the
> cutter.
> >
> > But, my intention is to cut patterns. curves and such.
> > So, just as you could curve your cutter when you cut by hand, the
> > cutter should rotate to always be aligned to the direction of cut.
> >
> > Dave
> >
> >
> >
> >
> >
> > --- In CAD_CAM_EDM_DRO@y..., "Brian" <ka1bbg@w...> wrote:
> > > Hi, well my years of cutting glass tell me if you spin the
wheel
> > with
> > > pressure on it you probably will break the glass or make a star
> > crack. to
> > > make square edges you must lift,orientate,start the new cut
> before
> > the old
> > > cut line to make a clean break reliably. good luck brian f.
> > > ----- Original Message -----
> > > From: "turbulatordude" <davemucha@j...>
> > > To: <CAD_CAM_EDM_DRO@y...>
> > > Sent: Wednesday, July 17, 2002 9:56 PM
> > > Subject: [CAD_CAM_EDM_DRO] Direction follower ?
> > >
> > >
> > > > Hi all,
> > > >
> > > > I am still toying with cutting glass and found that a weighted
> > > > standard glass cutter will cut glass easily enough.
> > > >
> > > > the problem is turning the cutter so it is always facing the
> > > > direction of cut. This is similar to knife cutting vynal,
but
> it
> > > > appears to me that the action would have to be pretty
accurate
> in
> > > > angling in the direction of cut so as to score the glass
> cleanly.
> > > >
> > > > Any ideas on how best to do this ?
> > > >
> > > > Dave
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Addresses:
> > > > FAQ: http://www.ktmarketing.com/faq.html
> > > > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > > >
> > > > OFF Topic POSTS: General Machining
> > > > If you wish to post on unlimited OT subjects goto:
> > > aol://5863:126/rec.crafts.metalworking or go thru Google.com to
> > reach it if
> > > you have trouble.
> > > > http://www.metalworking.com/news_servers.html
> > > >
> > > > http://groups.yahoo.com/group/jobshophomeshop I consider
this
> > as a
> > > sister site to the CCED group, as many of the same members are
> > there, for OT
> > > subjects, that are not allowed on the CCED list.
> > > >
> > > >
> > > >
> > > > 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 group:
http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> > > > bill,
> > > > List Mom
> > > > List Owner
> > > >
> > > >
> > > >
> > > > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> > > >
> > > >
> > > >