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Author Topic: Faceting Designs Book  (Read 1135 times)

MakkyBrown

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Re: Faceting Designs Book
« Reply #30 on: August 08, 2019, 10:42:11 AM »
Andrew ,
The book is most interesting - good to see some original thinking in design to maximise the beauty of faceted stones. Trouble is I don't know which pattern to try first !!!
John
Thanks John

FlashGP

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Re: Faceting Designs Book
« Reply #31 on: August 19, 2019, 11:09:20 PM »
Hi Andrew,

Congratulations on your book.  It is interesting to compare the effect of the pavillion facet shapes against the performance of the design.  The arrow shaped facets in many of your designs seem to be the key to a good performance across a wider range of tilt angles than the more traditional elongated diamond shaped mains facets in standard cuts.

Regards,

Gordon
Yours Sincerely
Flash (Gordon)

Ghost

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Re: Faceting Designs Book
« Reply #32 on: August 20, 2019, 08:10:01 AM »
FlashGP,
This effect has long been suspected.
Hence the cut 'SRB With Spiked Mains', and the many designs with vertically split mains.
A case of the computer confirming what the eye has already seen.
Congratulation to Andrew for incorporating the effect into his designs.
Regards,   Ghost.

MakkyBrown

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Re: Faceting Designs Book
« Reply #33 on: August 20, 2019, 05:36:58 PM »
Hi Flash and Ghost,
I think I follow what your saying.
The as you say arrows and diamond shapes both work. Arrows are imo better.  It is a case of fitting 7 or 9-fold(really 1 fold)  pavilion to an even girdle symmetry shape.  The technique does it fairly smoothly without creating a mess. To try and use diamond shaped mains becomes more of a mess and harder to meetpoint.
The performance is coming from the 7 and 9 fold symmetry pavilion.
Checkout one of my free designs Seven RBS and compare it with Seven Steps in the book both really easy to cut and great performance. Crowns would probably swap.
https://facetingdesigns.com/downloads/SevenRBSAIB060.pdfI have also started TRYING, and it is certainly trying lol, to upload a few videos of test cutting etc to Instagram.  https://www.instagram.com/abfacetdesign/
Photographing/videoing clear stones like topaz I'm finding quite tricky.

CheersAndrewps. I am also progressinig on my concave machine. I'll soon have most of the cutter unit made and will be working on electrics. I'll upload a couple of pics soon. I have to make up a puller to remove the collet holder from the shaft as the shaft needs shortening to reduce flex. Motor with 8mm shaft is probably better than the 6mm on the motor I have. I'll try the 6mm shaft motor but have a feeling it might flex a bit if using a heavy hand polishing.


Rusted

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Re: Faceting Designs Book
« Reply #34 on: Today at 04:55:32 AM »
I recommend cutting a simple shape first to get the feel of the way Andrews designs work, they are a bit different.

Well I jumped in at the deep end as usual and cut an oval first up, after couple of hiccups it came out amazing.

I started my oval on a small piece of Peridote and after a while I got completely bamboozled, I took that off and threw it in the bin and started the same design on a bigger piece of Springsure Labradorite, I got to the same place again in the design but now could see where it was heading (bigger stone) so easily finished it. Beautiful performance for a fairly low RI stone.

I did save the Peridote from the bin, it will see another day.


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