jamesp
Cave Dweller
Member since October 2012
Posts: 36,371
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Post by jamesp on May 5, 2018 11:42:19 GMT -5
My melt glass has bowed-outward edges after melt yielding this bowed shape easily final shaped on the flat lap. Questions 1) Do you cab folks use a flat lap much or always the 6 and 8 inch wheels on a cab machine ? 2) Are these bowed edge shapes marketable/desirable ? Is there a name for such shape ? Dry ![](https://c1.staticflickr.com/1/946/41190209294_d0e2996549_z.jpg) Wet ![](https://c1.staticflickr.com/1/944/28037603798_3572a05490_b.jpg) Yet another question, what type of machine is best for finishing smaller-than-six-inch diameter concave's ? Perhaps a glass grinder w/1 inch wheel ? ![](https://c1.staticflickr.com/1/965/27038709917_365f5c2094.jpg) Thanks in advance.
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Post by Peruano on May 5, 2018 11:51:57 GMT -5
Concave and convex edges are cool. Call them free form. For tighter curves there is always the Pixie (4" wheels), but obviously smaller wheels are available, but will be slower. I have a friend who says he is so sick of ovals and shields that he just has to cut cabs that have curved edges.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,371
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Post by jamesp on May 5, 2018 14:20:25 GMT -5
Concave and convex edges are cool. Call them free form. For tighter curves there is always the Pixie (4" wheels), but obviously smaller wheels are available, but will be slower. I have a friend who says he is so sick of ovals and shields that he just has to cut cabs that have curved edges. The lap allows you to rocking chair the piece and easily grind that curve Peruano. I was not aware of small diameter pixie wheels for a cab machine. A good many free forms out there with sharp radius though. Free form it is, appreciate the info.
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Post by rockjunquie on May 5, 2018 14:22:45 GMT -5
The glass grinding machine has a lot of bits to choose from in terms of diameter and grit. For something that small, I'd look into it. Nice cabs, BTW! ![:)](//storage.proboards.com/forum/images/smiley/smiley.png)
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unclesoska
freely admits to licking rocks
![*](//storage.proboards.com/forum/images/stars/star_pink.png) ![*](//storage.proboards.com/forum/images/stars/star_pink.png)
All those jade boulders tossed in search of gold!
Member since February 2011
Posts: 934
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Post by unclesoska on May 5, 2018 17:01:05 GMT -5
I love using my glass grinder for shaping! What Tela said and since the piece rests on a flat surface as you're shaping it, I find it quite relaxing and can really see the progress in real time, as opposed to "grind, look, repeat.
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Post by Drummond Island Rocks on May 6, 2018 14:59:28 GMT -5
I think a glass grinder would suit your needs although you are working in quantities that most of us have no experience with. I have a few extra glass grinders laying around if you need one PM me. They are easy to come by around here on craigslist. Normal going rate used is under $50 (without bits)
Chuck
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Post by hummingbirdstones on May 6, 2018 15:09:17 GMT -5
Curves make them "designer" cabs. And yes, they are cool and desirable.
I would agree that for the tight, inside curves a glass grinder would be the way to go.
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