RE: [CAD_CAM_EDM_DRO] Re: Glass cutting

Cool, so I don't have to disappoint you in saying that glass cutting doesn't
quite work like the movies (where they cut a circle in a window, and knock
it out).

So have you had the machine moving?

You need some sort of CAD program, like AutoCad, then you need to convert
that to G-Code for Mach3 to use. Isn't there a guide on the Mach3 website?
(I don't use Mach3, I use TurboCNC to control my machines)

Scribing a line is fairly easy, it's the same as drawing with a pen. Move
to correct X/Y, bring Z down, move about, bring Z back up, and repeat. It's
usually called 2D work, as the z-axis just needs to up & down.

If you're talking about using a wheel cutter and getting it to turn, then
that's a bit of work. That will be your fourth axis, and reading up on
vinyl cutters (and the software they use) will be helpful. 'Tangential
knive' is another term you can search on. You might need to build it
yourself, it's not exactly a common item.

If you use a diamond cutter, you don't have that hassle.

Tony

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of balsanu_gabi
> Sent: Sunday, October 22, 2006 10:42 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Glass cutting
>
> Hi Tony,
>
> I know how to cut glass, what I don't know is how to "tell"
> my driver to move wheel glass cutter after a line. I think I
> need a stepper motor to do that (I am very new in this area -
> CNC). If my guess is right - how I can "tell" to do that?
>
> TIA
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Tony Smith" <ajsmith@...>
> wrote:
> >
> > > Hi to all,
> > >
> > > I have a cnc router (x=3000mm, y=2500 mm, z=250 mm, Porter cable
> > > 3.5HP, max 24000 rpm, gecko drive, mach3). So, I want to
> cut glass
> > > with this machine. What do I need? How can I instruct my
> dirver to
> > > do that (see the links - scroll down a little bit to see video)
> > >
> > > http://www.tlcinternational.com/tlc_phoenix-600_glass_cutter.html
> >
> >
> > You need to bolt a water jet to it. Or maybe a laser.
> >
> > Almost all glass is 'cut' by the 'score & snap' method. In short,
> you make
> > a scratch (called scoring) in the glass, and then bend it. The
> glass
> > (usually!) cracks along the score line. The edges are then ground
> smooth.
> >
> > That's what the machine in the link does (apart from smoothing the
> edges).
> > I'm not quite sure how it does it (video wouldn't play) but it'll
> be
> > something along those lines.
> >
> > Look up how stained glass is done. Google 'Toyo wheel glass
> cutter', that's
> > similar to what that machine is using. Also look up 'vinyl
> cutters',
> > particuarly how the knife rotates.
> >
> > I'm wondering why they just didn't use a diamond cutter. Don't
> need to
> > rotate that. (Ahh, RTFA again, they're considering it!)
> >
> > Easiest solution is to mount a diamond cutter to do the scoring,
> and break
> > the glass by hand. Not sure how much pressure a diamond cutter
> needs to
> > produce a score, but a wheel cutter needs couple of kilograms or
> so.
> > You'll need to experiment a bit.
> >
> > Tony
> >
>
>
>
>
>
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