Jewelry CAD Design Tutorial #21: How to Calcuate Metal Weight from Rhino 3D Model (有中文字幕) 

that is super!!

Glad you enjoy it

Hi Michael, thank you for your comments. Sometimes, it is nice to heard from the subscriber/fan to know how my videos help, Not only it encourages me to make more videos, but more accurately in need. I love to share what I know. and please feel free you like me to cover certain topics. Best, PJ

Hi PJ.... I will try to provide more feedback regarding your work. I have been studying your works extensively for about a year now.I find that you are able to demystify the central problems which tend to hinder learning within 3D Modelling practise. You provide continuity, from subject to subject ,which enables students to advance their understanding and knowledge.This enables learners to check for understanding , and to reinforce the application of their new knowledge and skills.The attention that you give to the minutest details in your explanations , is part of the magic that underpins your teaching and guidance. I thank you , as must countless others who benefit from your works. KindRegards , Michael Cassimatis

Super!!

Happy to hear that!

you are welcome!

You are welcome

Thank you! 😃

Glad you liked it

It's my pleasure. Hello from USA!

You are most welcome

My pleasure

That is great, I love to share!

Glad you enjoyed it

Freyja Thayer thank you!

You are welcome!

You are welcome!

No problem!

Glad it was helpful!

You are very welcome, Jose!

Hi Shwetank, The prongs number, and thickness is a design/aesthetic choice.There is no set rule for it. For example, you can have four 1.2 mm prongs OR ten 0.6mm prongs for 1ct round diamond. Technically, you don't want the girdle of stone cut over 50% thickness of prong, which will weaken the setting, and cause you repeating repair in the future. Two Rhino plug-in software GemVision Matrix and RhinoGold (they both own by Stuller now) have excellent feature regarding the stone setting and various prong shapes. It will speed up your design process on modeling jewelry. If you are in jewelry business, you can check out that two software at www.stuller.com/customsolutions/

Thanks for watching!

Glad you enjoyed it

Glad to hear it!

No problem!

You are welcome!

You are welcome

You can check out my video at ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dwD8gPX0a2U.html

that is a good questions. depends on what type of resin you use. maybe search the manufacture specification on the type of resin you used and look for the specific gravity. so you can do the calculation.

My pleasure!

You are welcome, Catherine!

Thank you. Check out the video that is going to be released today (March 19, 2018). It shows you how to hollow out the ring. ^_^

Thank you.

Thanks Alice!

You are welcome.

Rymond Habiboella Thanks Rymond.

You are welcome

Thank you, Patricia!

Thanks

Hi ADMWWS, I wish there is a rule and standard for it. A short answer for your question, there is no standard thickness for casting and printing. the longer answers will be depends on the structure of design, stone arrangement, type of metal casting, finishing process ect. Each metal casting vendor has they own casting setup and polishing finish process. Even the same CAD sent to different casting vendors, you may have different result due to different 3D printers (shrinkage), casting setup and finishing process. I will suggest you to do some test with certain vendors to find the best result for you.

Sure Praveen. that is a great question. I will put it on my video creating list.

here is the new video link to STL file question and more. check it out. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-VsFrfQlO70w.html

I do have one on my channel. check out this one ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dwD8gPX0a2U.html

Hi Eros, I do have few people asked the same thing about the volume. I think I didn't know the setup was off till I finished on couple of my video. You shouldn't have volume issue on the recent video. Thanks for the reminder. I will keep in mind.Best,

Base on google search "The difference between density and specific gravity is that one is a ratio of the other. Density is the measure of the amount of mass per volume. Specific gravity is a measure density relative to the density of a reference substance." I was using specific gravity to do the calculation. Thank you for providing information for other calculations. ^_^

You may need to find the plug in for it

you can check on this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dwD8gPX0a2U.html

you can check out this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-VsFrfQlO70w.html

Thank you.

you may want to check this video out ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-fsbqZH-hSlE.html. it has the similar concept for signet ring with logo and texture.

CAD can calculate by the volume, but there is no way beside guessing from experience for hand drawing.

@@PJChenJewelryDesign thank you for your reply. Does your membership focus on the introduction of jewelry design and increases build upon Knowledge from there?

yes. it will

Thanks 😊

@@Tdontworry You are welcome

Rhino render has preset metal material to use. If you have interested in Keyshot rendering. I have a playlist for keyshot rendering on my channel.

Yes, correct

sure you can use that as well. 1 gram=0.643 dwt

thanks

no. it doesn't

@@PJChenJewelryDesign What are your thoughts on Grasshopper Gold?

Rhino itself doens't have this command. You may want to contact your software support to check if there is any bug.

want you calculate the weight of metal, you need the specific gravity to calculate on specific metal.

@@PJChenJewelryDesign if it was 6g 9karat gold then my question is would it be accurate if the software says it’s 6g in 9 karat gold? Thank you for your reply

I have a video for reducing weight here at ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dwD8gPX0a2U.html

@@PJChenJewelryDesign thq

www.hauserandmiller.com/reference/melting.html this is the chart for the metal specific gravity. there is no 21k gold. but you can guess somewhere in between 18k and 24k. if you are using matrix. it does has the function for metal weight.

I use specific gravity to calculate the different weight of metal for casting compare to wax. Here is what I found the definition online. Density and specific gravity are both used to describe mass and can be used to compare substances. However, they are not identical measures. Density is defined as mass per unit volume. It has the SI unit kg m-3 or kg/m3 and is an absolute quantity. Specific gravity is the ratio of a material's density with that of water at 4 °C (where it is most dense and is taken to have the value 999.974 kg m-3). It is therefore a relative quantity with no units. The words ‘taken to have the value’ are important here, as the value of maximum density cannot be known exactly (nor, for that matter, can the temperature of 4 °C be realised exactly). www.npl.co.uk/resources/q-a/density-specific-gravity-differences#:~:text=Density%20is%20defined%20as%20mass%20per%20unit%20volume.&text=Specific%20gravity%20is%20the%20ratio,relative%20quantity%20with%20no%20units.

@@PJChenJewelryDesign Becouse i using rhino for making models for engraving for new chocolate moulds and i using normal density of chocolate.

in the command bar on the top.

Dope thanks, I’m just starting rhino 6 at my school

Thanks!

Thank you