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 Post subject: Re: Jam Peg Video
PostPosted: Fri Dec 17, 2021 5:34 pm 
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Couldn't be so wrong or such an overreaction. There is some serious skill on display in that video. Faceters may be sitting in front of their modern machine thinking, what am I missing, what can I do better, what should I do different. There are more reasons for my initial post in wanting to get a better perspective on what stones are actually quality cut on jamb pegs, but I will let the reader think those through.
The broad answer for modern machine faceters who want to achieve yield plus performance is learn to be a gem cutter, not a paint by numbers faceter, rigidly adhering to meet point faceting. Other experienced contributors to this discussion have alluded to that and given examples. Also in many previous post topics.

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 Post subject: Re: Jam Peg Video
PostPosted: Fri Dec 17, 2021 7:11 pm 
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I don't believe anyone who has posted on this thread has ill intent or a hidden agenda to start flame wars.

Let's stick to the topic(s) at hand please and leave presumptions of intent to Dr. Phil. :roll:


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 Post subject: Re: Jam Peg Video
PostPosted: Fri Dec 17, 2021 8:51 pm 
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geowork wrote:
That could be seen as a condescending reply, given the opinions and knowledge already demonstrated in this discussion. Also the questions were posed with consideration that others reading may have similar issues and be interested in responses. Apart from that, yes, I could contact them direct.

Regards.

There was not any ill intent in my question, What issues. I do not see issues in the video, And the suggestion of contacting them was just that a suggestion. My apologies as you seem to have found it condescending. But again please explain the issues, I am not understanding that part of your dialog. Are the issues the specific questions your asking?

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 Post subject: Re: Jam Peg Video
PostPosted: Wed Jan 12, 2022 11:21 am 
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Not been on here for three years, just flicked on this video, despite not speaking much German I understood most of it. It helps being a jamb peg lapidary.
Thanks for posting. F


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 Post subject: Re: Jam Peg Video
PostPosted: Thu Mar 24, 2022 2:39 am 
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Location: Lyon, France
Thanks for sharing this video. It’s not often that we get to see behind the scenes of the German cutting industry, especially one with English subtitles! Even more special is that it’s at the Arnoldi factory who always do such beautiful work. I wanted to add a few comments to the discussion.

I went to Idar Oberstein a few years ago and got to visit a few cutting studios as well as meeting other German cutters later in other parts of the world. As far as I’ve seen, professionally trained German cutters only use the Jambpeg even though sometimes there is a mast type thing on their faceting bench. They don’t use that and I’m not quite sure why it comes in the machine when no one uses it. They get very good at the Jambpeg and prefer this above all other methods of cutting. They believe it’s the most superior way to cut a stone. I’m not sure I agree but they get amazing results, so no problem!

As for the left to right use of the hole on the pegboard, as previously stated In comments, cutters have different holes they like to use based on how they’ve been worn in but also going left to right can act a bit like a cheater, allowing their hand to rotate in a different way. Technically with a non indexed machine, rotating your hand slightly is already a cheater but that might be uncomfortable with your hand at certain angles so you can move left or right which also twists your wrists a bit and rotates the stone slightly.

Watching these guys work is absolutely amazing to me. It’s really really hard to work this way. I’ve tried polishing once on a German machine and wow! It’s all about muscle memory. Everytime you pick up the stone to inspect it, you have to put it back on the lap exactly the same way and that’s all in your hand and wrist. No rotational reference points at all. Really challenging which is why the German apprenticeship last so long!

I also love that the cutter mentioned why they cut with the left hand and the story of the Bohemian cutter Postler who brought this technology from Bohemia to Germany. I didn’t realize this story was so well known among cutters.

Thanks again for the Share

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