I'm obsessed with your tutorials, you have such great and structured education technique, clear in explanation and ease of voice tone, can't appreciate more for your videos! Plz keep updating more tutorials, I'm your forever fan!! 🤟🤟
This is a wonderful old technique for converting volume to gram weights. I first saw this in a classroom in 2005, but I'm pretty sure it's older than that. Thank you for bringing it to UA-cam. Incidentally, this is PRECISELY the calculation being made by Matrix and MatrixGold and their predecessors RhinoGold and TechGems. They call it density instead of Specific Gravity, but it's pretty much the same.
Thank you for providing a fundamentally critical tool which is essential for the calculation of metal weight from a wax 3D Model ... As in all of your works PJ , this production shows how deep your knowledge and understanding is of those issues which are so important to the the student jeweller and professional alike ..... Thank you again , Michael Cassimatis
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
Thank you for your effort to make such wonderful videos, can you make a series of video of to make rings using different types of setting, what are the technical parameters to be consider according to diamond size. For example if we are making a prong setting for diamond of sieve size of 6.5 , how should we consider dimension of prong
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/
PJ you are cool! That was a great video. I love all your videos! I'd love to see how you hollow out that ring. I followed your video and made that ring for practice a while ago and wondered how you'd go about hollowing it out.
@ PJ Chen Jewelry Design madam you are just awesome, I am a regular visitor of your channels Wherever I face any trouble in cad I like to come visit your channel and search the particular subject and you definitely done perfect video on that Really appreciate your constant Hard work, madam I have a question regarding metal weight, how you know the actual weight of printed RESIN piece by VOLUME? Thanks in Advance🙏🙏🙏
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.
hi PJ, I have a solid object (no naked edges , no manifold edges ) but I can not weight it... even after assigning a material to it... eg. 925 silver... I use command weightmetals... after waiting for the usual few seconds for computer to calculate... nothing happens. :(
Hi PJ...great videos as usual..can you make a video on scaling the model before exporting to .stl for 3D printing? and preparing the model for 3D printing. thanks
Hey PJ, whats the difference between what you did and taking the volume(mm3) of the ring and multiplying it by the density(g/mm3) of 14k gold. We would get the same result, the mass in grams, which we could then convert to troy ounces.
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. ^_^
Hi PJ, i have doubt in weight of metal, i'm new to jewelry cad design, for eg above model ur PJ ring volume is 1035 how reduce this volume size without reducing the quality of model. is it possible...? thq in advance
Can anyone help me determine my 3d obj. mushroom design size to weigh a specific weight in .999 Fine SIlver which is 1 oz= 31.1 grams. I need the mushroom in a size of 1,2, 5 and 10 oz size and have no way to determine this. I have the 3d obj.file I could send anyone that can help me out;) Please let me know
Hi PJ, I've recently subscribed as a member for your online stone setting course. The videos were amazing & clear. Loved them all! But I was wondering if there's a video on what to take note on before the wax is printed and sent for investment casting? Like what's the thinnest width we can go for in the design. Because designing it in Rhino/Matrix makes everything looks pretty, and probably will look good in the printed wax too, but when it comes to investment casting, the outcome isn't what was expected. ☹️ Why is that?
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.
@@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
Hi, great videos by the way, so I want to clarify lets say i was doing it in 10k using your method the last equation would be: spot price of gold in 24K * 10/24 = the price of gold in 10K ?
This helped a lot. Could you tell me more about the size and weights of jewelry from a basic knowledge point of view. I'm familiar with creating custom styles by hand but not computerized. I recently reached out for a cad and was asked about the size and weight but I had no idea of how to calculate this from my hand drawings. Is there a tutorial or step that I can take to learn more about this process from hand drawings?
@@PJChenJewelryDesign thank you for your reply. Does your membership focus on the introduction of jewelry design and increases build upon Knowledge from there?
Hello and thanks for great educational video ,i enjoyed it the only thing please if you can increase the volume because is very low and hardly to hear )) thanks again and I will try to watch all other videos) thank you!
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,
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.
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'm obsessed with your tutorials, you have such great and structured education technique, clear in explanation and ease of voice tone, can't appreciate more for your videos! Plz keep updating more tutorials, I'm your forever fan!! 🤟🤟
that is super!!
Hello, Everyone, check out the video showing you how to hollow the ring at ua-cam.com/video/dwD8gPX0a2U/v-deo.html I hope you all enjoy it. Thank you
This is a wonderful old technique for converting volume to gram weights. I first saw this in a classroom in 2005, but I'm pretty sure it's older than that. Thank you for bringing it to UA-cam.
Incidentally, this is PRECISELY the calculation being made by Matrix and MatrixGold and their predecessors RhinoGold and TechGems. They call it density instead of Specific Gravity, but it's pretty much the same.
Glad you enjoy it
hi teacher
you r the most valuable advisor in rhino
itsvery very useful
Thank you! 😃
Yes yes yes. This really will help me so much give more accurate quotes. You're a life saver 💪👍
Super!!
You are great teacher mam...love from India...
It's my pleasure. Hello from USA!
Thank you for providing a fundamentally critical tool which is essential for the calculation of metal weight from a wax 3D Model ... As in all of your works PJ , this production shows how deep your knowledge and understanding is of those issues which are so important to the the student jeweller and professional alike ..... Thank you again , Michael Cassimatis
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
oh wow finally this is a great video u showed something that is so much important . thanks for sharing your knowledge with us you are a great person
you are welcome!
Thanks PJ chain , very useful information
Glad you liked it
Thanks for sharing your valuable knowledge
My pleasure
Thanks , wonderful help for calculating Gold weight .
You are most welcome
Thank you for sharing this information with us....
No problem!
Thank you!I find your videos the most helpful and precise videos, amazing!
Happy to hear that!
Thank you again, very helpful
You are welcome!
Thank you,
i am watching each of your videos.
There are amazing.
You are welcome
Thank you for your effort to make such wonderful videos, can you make a series of video of to make rings using different types of setting, what are the technical parameters to be consider according to diamond size. For example if we are making a prong setting for diamond of sieve size of 6.5 , how should we consider dimension of prong
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 again...interested to know hollow into the model..it will b very much helpful if you can make a demonstration regarding the scooping...
You are welcome!
excellent!
Thank you
PJ you are cool! That was a great video. I love all your videos! I'd love to see how you hollow out that ring. I followed your video and made that ring for practice a while ago and wondered how you'd go about hollowing it out.
Freyja Thayer thank you!
Thank you very much
You are welcome!
Id love to watch the video with hollowing inside the ring )
thank you!
You can check out my video at ua-cam.com/video/dwD8gPX0a2U/v-deo.html
Awesome. Just awesome. Thank you very much.
You are very welcome, Jose!
thank you PJ. YOU ARE COOL. this video help me a lot!!
That is great, I love to share!
Another great video - Thanks PJ
Glad you enjoyed it
Thank u, i love your video
Thanks for watching!
Thanks a ton!! Very informative video.
Glad it was helpful!
@
PJ Chen Jewelry Design madam you are just awesome, I am a regular visitor of your channels
Wherever I face any trouble in cad I like to come visit your channel and search the particular subject and you definitely done perfect video on that Really appreciate your constant Hard work,
madam I have a question regarding metal weight, how you know the actual weight of printed RESIN piece by VOLUME?
Thanks in Advance🙏🙏🙏
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.
great info thanks
No problem!
hi PJ, I have a solid object (no naked edges , no manifold edges ) but I can not weight it... even after assigning a material to it... eg. 925 silver... I use command weightmetals... after waiting for the usual few seconds for computer to calculate... nothing happens. :(
Rhino itself doens't have this command. You may want to contact your software support to check if there is any bug.
PJ you're cool, I like your video! Really helped
Glad to hear it!
Great video!
Glad you enjoyed it
Thanks for this one!
My pleasure!
thank you very much ...
You are welcome.
great video. Thank you
You are welcome, Catherine!
PJ your cool, i love your tutorials and yes please I like to know how to hollow this ring.
Thank you.
Thank PJ!!
You are welcome
PJ! You are cool!! Thank you for your video! I love to know how to hollow out the ring! Please~~~~~
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 so much for this video!also interested about how to hollow the ring:)
Thanks Alice!
Hi PJ...great videos as usual..can you make a video on scaling the model before exporting to .stl for 3D printing? and preparing the model for 3D printing. thanks
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. ua-cam.com/video/VsFrfQlO70w/v-deo.html
Hey PJ, whats the difference between what you did and taking the volume(mm3) of the ring and multiplying it by the density(g/mm3) of 14k gold. We would get the same result, the mass in grams, which we could then convert to troy ounces.
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. ^_^
so cool
Thanks
Hi PJ, i have doubt in weight of metal, i'm new to jewelry cad design, for eg above model ur PJ ring volume is 1035 how reduce this volume size without reducing the quality of model. is it possible...? thq in advance
I have a video for reducing weight here at ua-cam.com/video/dwD8gPX0a2U/v-deo.html
@@PJChenJewelryDesign thq
nice video
Thank you.
you may want to check this video out ua-cam.com/video/fsbqZH-hSlE/v-deo.html. it has the similar concept for signet ring with logo and texture.
PJ I love your Videos!!!!!!! and could you please make a tutorial to make it hollow.
I do have one on my channel. check out this one ua-cam.com/video/dwD8gPX0a2U/v-deo.html
Great video!!! how do you get the table in Rhino? There is usually a table that can show you the weights in Rhino for all metals.
You may need to find the plug in for it
Can anyone help me determine my 3d obj. mushroom design size to weigh a specific weight in .999 Fine SIlver which is 1 oz= 31.1 grams. I need the mushroom in a size of 1,2, 5 and 10 oz size and have no way to determine this. I have the 3d obj.file I could send anyone that can help me out;) Please let me know
Mam, can you do, metallic color applying and rendering video
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.
great video!
Thank you, Patricia!
Hi PJ, I've recently subscribed as a member for your online stone setting course. The videos were amazing & clear. Loved them all! But I was wondering if there's a video on what to take note on before the wax is printed and sent for investment casting? Like what's the thinnest width we can go for in the design. Because designing it in Rhino/Matrix makes everything looks pretty, and probably will look good in the printed wax too, but when it comes to investment casting, the outcome isn't what was expected. ☹️ Why is that?
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.
What's is multiplier for 22 carat
How accurate are the weights if you had a 6g ring would it be 6g thank you
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
Hi PJ, does Rhino have a Metal Weight & Gem Reporter feature?
no. it doesn't
@@PJChenJewelryDesign What are your thoughts on Grasshopper Gold?
Hi, great videos by the way, so I want to clarify lets say i was doing it in 10k using your method the last equation would be: spot price of gold in 24K * 10/24 = the price of gold in 10K ?
Yes, correct
This helped a lot. Could you tell me more about the size and weights of jewelry from a basic knowledge point of view. I'm familiar with creating custom styles by hand but not computerized. I recently reached out for a cad and was asked about the size and weight but I had no idea of how to calculate this from my hand drawings. Is there a tutorial or step that I can take to learn more about this process from hand drawings?
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?
PJ you're cool, I like your video:-)
Rymond Habiboella Thanks Rymond.
Thank you great information here very useful , just one question will this work for rhino 7 ?
yes. it will
Thanks 😊
@@Tdontworry You are welcome
thanks
but why not use grams to dwt pennyweights?
sure you can use that as well. 1 gram=0.643 dwt
Hello and thanks for great educational video ,i enjoyed it the only thing please if you can increase the volume because is very low and hardly to hear ))
thanks again and I will try to watch all other videos)
thank you!
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,
👍
Thanks!
Good tutorial but why you call density a specific gravity?
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.
how to make it hollow inside ? thank you for sharing your knowledge
you can check on this video ua-cam.com/video/dwD8gPX0a2U/v-deo.html
Sir, How to calculate 21Kt weight in matrix or rhinocores?
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.
Thanks for your information.
Please show me how to convert .3dm to .stl in rhino
you can check out this video ua-cam.com/video/VsFrfQlO70w/v-deo.html
How would you enter in measurements like 20, 17
in the command bar on the top.
Dope thanks, I’m just starting rhino 6 at my school
nice madam
thanks
excellent!
thank you very much
You are welcome