Re:success with glass engraving

Hi Robert,

I think you're asking about using a rotary table, substituted for an
axis, and "wrapping" the replaced axis around the glass. YES! Tony's
page, mentioned today, gives an example of engraving a knob!

http://www.jeffree.co.uk/Pages/divheadmk2.html

Alan KM6VV

cncrouterusa@... wrote:

>
> Thanks for comments,
> Responses are mixed below
> >Alan KM6VV
> >Interesting! What do you use for a cutter?
> See below
>
> >Smoke
> >Not bad Robert! Now if you'll program the machine to engrave on the
> >sides
> >of glasses using a fourth axis, add some animal or other scenes, you'll
> >have
> >something that should really sell as custom engravings!
> Yes I have already found that is in demand. I think the hardware cludging together I can handle, the cost of the programs is killing me. That is why I have MaxNC, use Miceografix Draw for CAD and all freeware conversion programs. Let me pose this question "IF" you know the circumference of a straight sided glass and could program the steps to match: could you use the X as the rotator?
>
>
> >jvicars@...
> >What tool did you use?
> I used a 1/8 diamond ball on glass.jpg and a 1/16 diamond tear shaped on glass2.jpg
>
> >What feed, speed, depth of cut?
> My machine is not set up to give that reading properly, but it is slow, I guess I should try and determine that, I used a Dremel at the lowest RPM setting, the cut depth ended up being 1/64 on the one with scrolls and 1/16 on the text, at first it seemed like it was going to crack for sure, but went right through it.
> >What type of glass?
> Sorry, don't really know,just snatched it up from a pile. It came from an old Micofishe reader mount.
> >How did you fixture (hold) the glass?
> I placed some 1/8 high density foam under the glass and clamp down with flat aluminum plates using the P-Nut mounts in my Corian table. I am going to try it without the foam once, I thought it might help to cut down on stressing the glass. It was not what I would call a good machine fixture but there was no movement or slippage. If this gets any paying prospects I will use a back stop and adjustable side clamps.