Making Domes To The Correct Size - Making Your Own Jewellery
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- Опубліковано 18 жов 2024
- So you want to make a dome but don't know what size disc to start out with?
This film shows you how to calculate the correct size disc of metal to make a certain size dome/hemisphere.
Andrew Berry, a professional jeweller for 30 years, is the training director of www.AtTheBench.com, an award winning on line jewellery training website.
This was exactly what I was wondering about this morning.....I've written it down and saved the video! Thank you!!
Im about to make a silver egg, and this formula was just what I have been searching for for hours, thank you Andrew, absolute champ!!!
I have been looking for this formula FOREVER! Thank you!!!
Sound was perfect. Thank you. Clear, crisp, no wasted time.
Best dome making video on the UA-cams. Thanks Andrew.
So useful. Thank you, couldn't find the equation anywhere to do this. Much appreciated.
Being next to complete zero in maths, I highly appreciate the formula you give, as well as all the techniques shown and explained here. Thank you, Sir
GREAT TUTORIAL! Hammering is music to my ears😄
The best video about dapping punch👍👍👍 thank you!!!
I want to thank you for your videos, I've found a new hobby.
Great video ! I needed this EXACT info today
I’ll have to view this tutorial a few times, just to absorb the calculation part, it I love learning how to correctly
use my doming tool.
Very well explained. Thank you!
another informative video. love your tutorials!
Very informative video, thanks so much. Question? How do I remove a disk that is stuck in the doming block? Thanks in advance
Thank you Andrew!
Thank you so much Andrew that was very helpful. Do you have an idea of how I can create a dome for an oval shape stone . Tools etc
Great to have these formulas. I fancy making some balls spheres, so Id better buy a set. Thanks Andrew, really useful.
At 7:30 or so I was going to ask, don't you need to anneal that at some point so it doesn't split? And then you start talking about work hardening at 7:46! Lol! I just learned how to use my dapping block! Thanks Andrew.
That is one hell of a set you have there. So you make jewelry and lift weights at the same time!
dear sir you are professional , i have one question how do you find the center of the dome that you made
I am learning so much from your tutorials, thank you. My question is:
I have a disc cutter that is measured in inches. The dapper sets come in millemeters. If I convert my final disc size from your formula to inches,
will it be close to the correct size?
Hello Andrew. Thank you for another very informative video and for again sharing your wealth of knowledge and expertise. Please can you advise me whether the dome can be elongated as I would love to attempt making an acorn.
Best wishes and thanks again to you and Louise. Julie
.
Julie.
Sound was good, thanks!
I just picked up an inexpensive dapping/ doming set from our discount tool store here, and I’m wondering if the blocks are standardized or if some have deeper wells than other? Mine seem quite shallow- that said, I think I can still get a half sphere if I move the piece around in the well.
I think the more expensive ones are deeper
It would be interesting if you made two of them and how you would solder them into a ball.
Hi Andrew, i'm from germany und i'm looking your fantastic videos very often. Thank you for your great work :-). I don't know if you can help me about the technic to put a little 585 gold pallet into a 925er silverring. At the end it schould be one polished silver surface with a little gold point in it. Have you any idears how i could do this? Would be great... all the best Wolli
Last comment. I made a mistake. 1.4 = 7/5, not 9/5. 9/5 gets alot of action in my head because it's used to convert degrees Celsius to Fahrenheit. Other than that, I was curious to see the range of accuracy for that calculation I mentioned previously, and I graphed your function with the one I came up with, and they are nearly identical from at least -10^100 all the way up to 10^100. Weird how 9/20 times pi is really close to the square root of 2. Practically overlapping graphs for diameters much bigger than the number of atoms in our universe.
A good approximation for the formula you use to figure out what size diameter you need is to take the diameter of the original, subtract thickness, and then multiply by the square root of 2, about 1.4. So take the modified diameter, then just multiply by 1.4 and it gives a very close answer. It's within .01 millimeters of accuracy, and very simple.
Thankyou sir for making this video Please make a video of making a ball with these domes Inserting each other sir
Is there a way to make a full ball, rather than a flattened ball, with the doing block? Does this measurement only calculate for a flattened dome?
Andrew, is there somewhere I can find the formula written down so I can write it in my book?
Super Tutorial thank you
Thanks!
Thanks so much I am absolutely made up since I found your channel. ..now I can get rid of all the guesswork lol!
merci Andrew , have learned a lot...
Back again. I’m making copper beads and having trouble making them perfectly round. Some come out oval. This is practice, however I admire copper and am making a necklace for myself. Some beads are finished. Put the drill through my finger making one of the holes. Fortunately it missed my fingernail."...........so I’ll work at them more as you are doing, around the edges and so on.
Gratitude ♥️
Within .01 millimeters if you use many digits of the square root of 2. If you just use 1.4 it's probably accurate to around 0.3 milimeters. 1.4 is nice because 1.4 = 9/5. Dividing by five is just multiplying by 2 and then moving the decimal over one place. So you can do it in your head pretty quickly with that method. Just double, move the decimal over one place to the left, then multiply by 9. Quick estimate you can do in your head.
The 0.9 measurement. Could you explain please where this fixed number comes from? Is it the difference between the dapping tool and the dapping block?
Pretty old reply, I was also curious so I did my math, what you have to do is equate the surface area of a semi-sphere to that of a flat circle, and what you end up getting is pi * 0.9 /2 equals the approximate square root of 2.
What type of hammer are you using to make the dome?
Who makes the circle cutter you're using Andrew?
Durston make this particular cutter
Andrew, you used a ball peen hammer and a rawhide hammer interchangeably. Is one hammer better than another?
Thank you!
Gracias
Just curious how you came up with the factor of 0.9*pi/2. I did some simple geometry and came up with a factor of sqrt(2) which is 1.414. Amazingly, this is almost identical to the factor you used. I find with modern calculators using sqrt(2) is easier to use.
I'm guessing the .9 is to account for stretching. The pi/2 is obvious: diameter * pi = circumference, but you only want half of it.
But now I AM curious: how on earth do you get to sqrt2 from a rounding operation?!
You are correct, you can factor out the constants and end up with a number that is exactly sqrt2. In electronics, while averaging the absolute-value heighth of a sinus wave, we divide with sqrt2 to get the straight average (Imagine you take all the water that fills up half a dome with a certain depth, and you want it to fill the bottom of a straight cup. What will the new depth be? (In 2D and not 3D.)). Here you do the exact opposite, you take the straight line, and multiply with sqrt2 to get the sinus :)
@@rigormortis1157 I really wanted to know the answer to this, bit don't understand at all 😂
sound was fine!
I just adore At The Bench, and I am just about to plan on financially including an online training program. I feel hesitant to join because I have asked simple questions (which are encouraged on this UA-cam channel) and seldom if ever get an answer. Is this how the training program will be too? He seems so professional, but...... I am considering a serious investment, and I wonder why are there so rarely responses (even though asked for and feedback requested?)?
Gabby Flying Chef Hi. We are aware that the contact form on the website isn’t working at the moment so that could be a reason why you have not received an answer. We receive hundreds of emails from jewellers and it is not possible to answer every single one, sorry. One you are an At The Bench member you will have direct access to me so I should be able to answer your questions direct. In the mean time please contact me andrew@andrewberry.co.uk
It’s a great learning unfortunately I hounded the program and have no replied in two questions I made about torch safety
It’s a shame because I really liked the way you teach Andrew !
At the moment I cancel my subscription because I am je to this abs need help in the progress of learning I hope you can have more better customer service in the future to join again
Paula Andrea hi. If you have not received a reply then I am sorry. As I said in my previous comment that the contact form seems to be playing up. If you have anything specific to talk about then please email me at andrew@andrewberry.co.uk
Andrew Berry thabk so much for your reply ,,,😀 yes it must be the site then I will write again with my question then and hopefully get back on track with the course thank you
Andrew Berry hi have sent you the email 3 days ago I hope you have some time to read it thank you
"I'm going to tap that out", proceeds to belt seven shades of shit out of it. Well done sir, that's what a 'tap' should look like!
😳 I thought I clicked on a doming video, instead we are baking during a math tutorial. Never did reveal what flavor pie. 😳
I can't believe you use your rawhide hammer to punch out disks. It's not heavy enough for that. Use a brass one.
Me Now Gee....seemed to work fine for him...and he’s just a professional jeweler.
Thank you!
Thank you ☺