Join Kyle Houchens in this video where he shows a new Rhino 7 feature: ribbon offset. He explains how to create a complex 3D partition line in for making a mold in Rhino.
Thanks for all the tuorials, Kyle. I've been using Rhino for 6 months and I'm hooked! I'd really like a full tutorial on moldmaking if possible. Many thanks
I’m far from an experienced mold maker, but I did work with one on a project that inspired this tool. I generated the ribbon, he did all the actual mold making. I have made molds for simple parts but nothing complex or with slides, etc.
I know this is an old video, I've been able to do everything except blendsrf, as the polysurface from ribbon offset is open? so it doesnt have a closed edge to blend with the planarsrf edge... i cant seem to join the edges either. Not sure what to do about it or where i've gone wrong
make sure your tolerances are reasonable, if you are working in mm at .001... you will struggle to join stuff unless you model very specifically. for mm, .01 is usually fine for most models unless they are super tiny.
HI, Question: How is it that when I do my draft analysis, the result isn't one closed curved as though it looks like it, but rather a crazy amount of shorter curves all seemingly connected to one another. The RibbonOffset command doesn't work on opened curves. What can I do so that my DraftAngleAnalysis results in 1 closed curved? I had to closed all 48 curves one by one with the ConnectCurve command.
Awsome, is this feature also feasible to the Power Shape which is the adequate software for complex mould design for Autodesk? (Kudos to whoeever implemented this feature, very useful!!). Thanks Kyle!
Click an object, relocate the gumball to where you want the object to flatten to, then click the z axis scale box and enter 0. Then hit enter, and the part will flatten to the location of the gumball.
You fail to mention the cPlane's influence on the direction of the offset. This command gets particularly nasty when the curve being offset is a 3D curve (not flat on one plane). It seems to only work when in Top view (or whatever view is closest to parallel for the ribbon), its not great. Do you mind also explaining what each option within the ribbon offset actually does?
The cplane has less of an influence than you might think... the real factor in how well this works is the complexity of the original curve that is offset. If it's returning nasty results, run a rebuild on the curve, drop a few points but don;t go crazy. simply re-parameterizing the curve using rebuild often is enough to clean up any gank in the input curve and return a better result. if you get some nasty results, it's often because the input curve is a mess. SInce we are trying to generate an offset, and since the offset often wants to be less detailed, the rebuild can be super helpful.
How would this end up as a mould? what exactly would be the moulded result? this video isn't clear at all, seems like you are just showcasing a tool without any direction, I wanted to learn to do something like the example shown on the Rhino website wih the mould from the arm 3d model
correct this is just showing how to make a partition surface, it assumes you know how to make a mold already, as this helps with one of the difficulties making a mold. There are tons of videos on mold making on You Tube-
@@Rhinoceros3d weird that this is the main result when looking up "molds" on the Rhino website, and weirder still that you choose to make a detailed video and provide files for just the advanced solution while just showing the useful basics in just a gif on top (not to mention the downloadable test file is just the finished result so it's not like it can be used for practicing what you show in this video) and reading the comments on both this and the "Mold Making Tools: new in Rhino 7" video which shows what people actually want to learn yet you decide to just post the animation with the only """"explanation"""" being the icon for Ribbon Offset showing up on the screen Glad to see the official account of the software being too lazy to teach its own tools cuz "there are a ton of videos on mold making on UA-cam", the idea is to learn the most efficient way to use the tools and not depend on a probably unreliable method that some random youtube channel might have come up with that witht no guarantee that it will yield correct results with no errors since it is just the solution the came up with Sorry that I expected you to be a little bit more professional, my bad
@@funwithfamfun you'd start from the parting line of the part, and build one parting surface, then copy it for the other half- you'd then split your part and connect each copy to one side or the other. everything outside the parting line is identical top to bottom so they match up.
It would be really great if you could prepare a wholesome video, where both parts of the mold would be generated. For instance - this method would be used as a mold for casting PU foam (e.g. for car seats or something similar).
@@Rhinoceros3d Any chance you make a tutorial for a Mold where both sides are not equal? For example one is the cavity and other is the Core that complete the cavity of the piece?
As others have said - video is useless, how hard is it to make a video that guides you through the full mold process with Rhino instead of these half baked tutorials and gifs lol
The video is about how to make a partition surface, not how to make a mold. The partition surface is simply one part of a complex modeling problem required to make a mold. This tool was missing from the workflow in previous versions of rhino. You’ll need to learn a lot more than this tool to make molds.
![Rhino 3D Tutorial: How to Make the Surface Smooth [Requested]](http://i.ytimg.com/vi/CbB30g0TLRQ/mqdefault.jpg)
Thanks for all the tuorials, Kyle. I've been using Rhino for 6 months and I'm hooked! I'd really like a full tutorial on moldmaking if possible. Many thanks
I’m far from an experienced mold maker, but I did work with one on a project that inspired this tool. I generated the ribbon, he did all the actual mold making.
I have made molds for simple parts but nothing complex or with slides, etc.
I know this is an old video, I've been able to do everything except blendsrf, as the polysurface from ribbon offset is open? so it doesnt have a closed edge to blend with the planarsrf edge... i cant seem to join the edges either. Not sure what to do about it or where i've gone wrong
make sure your tolerances are reasonable, if you
are working in mm at .001... you will struggle to join stuff unless you model very specifically.
for mm, .01 is usually fine for most models unless they are super tiny.
HI,
Question: How is it that when I do my draft analysis, the result isn't one closed curved as though it looks like it, but rather a crazy amount of shorter curves all seemingly connected to one another. The RibbonOffset command doesn't work on opened curves. What can I do so that my DraftAngleAnalysis results in 1 closed curved? I had to closed all 48 curves one by one with the ConnectCurve command.
hard to say without seeing your file, send it to tech@mcneel.com and we'll take a peek.
Awsome, is this feature also feasible to the Power Shape which is the adequate software for complex mould design for Autodesk? (Kudos to whoeever implemented this feature, very useful!!). Thanks Kyle!
You could always make the ribbon in rhino and then export it elsewhere
Is there a method to automatically generate that parting line / ribbon / 3D curve on a part with hundreds of surfaces and curves?
Join them into a watertight poly surface and then run Draft angle analysis. There are tools to gen the parting line curves there.
@@Rhinoceros3d Worked perfectly. Wow and thanks
@@Rhinoceros3d thank you! I did not know that existed. thanks for the hint!
Hi @Rhinoceros3d at 3:30 when you copy/pasted and "scaled to zero".
Can you explain that "scale to zero" part?
Click an object, relocate the gumball to where you want the object to flatten to, then click the z axis scale box and enter 0. Then hit enter, and the part will flatten to the location of the gumball.
Great!
You fail to mention the cPlane's influence on the direction of the offset. This command gets particularly nasty when the curve being offset is a 3D curve (not flat on one plane). It seems to only work when in Top view (or whatever view is closest to parallel for the ribbon), its not great. Do you mind also explaining what each option within the ribbon offset actually does?
The cplane has less of an influence than you might think... the real factor in how well this works is the complexity of the original curve that is offset. If it's returning nasty results, run a rebuild on the curve, drop a few points but don;t go crazy. simply re-parameterizing the curve using rebuild often is enough to clean up any gank in the input curve and return a better result.
if you get some nasty results, it's often because the input curve is a mess.
SInce we are trying to generate an offset, and since the offset often wants to be less detailed, the rebuild can be super helpful.
How would this end up as a mould? what exactly would be the moulded result? this video isn't clear at all, seems like you are just showcasing a tool without any direction, I wanted to learn to do something like the example shown on the Rhino website wih the mould from the arm 3d model
correct this is just showing how to make a partition surface, it assumes you know how to make a mold already, as this helps with one of the difficulties making a mold.
There are tons of videos on mold making on You Tube-
@@Rhinoceros3d weird that this is the main result when looking up "molds" on the Rhino website, and weirder still that you choose to make a detailed video and provide files for just the advanced solution while just showing the useful basics in just a gif on top (not to mention the downloadable test file is just the finished result so it's not like it can be used for practicing what you show in this video) and reading the comments on both this and the "Mold Making Tools: new in Rhino 7" video which shows what people actually want to learn yet you decide to just post the animation with the only """"explanation"""" being the icon for Ribbon Offset showing up on the screen
Glad to see the official account of the software being too lazy to teach its own tools cuz "there are a ton of videos on mold making on UA-cam", the idea is to learn the most efficient way to use the tools and not depend on a probably unreliable method that some random youtube channel might have come up with that witht no guarantee that it will yield correct results with no errors since it is just the solution the came up with
Sorry that I expected you to be a little bit more professional, my bad
Good !
I wonder if there is a grasshopper script that automates this process with any coherent input. has anyone done taht yet?
Not that I know of, but all the components are available in GH to do so-
I think hat I'm missing is how to get the edge from the whole object. The split line
draft angle analysis will generate the curves that you can use to make the parting line.
How you paste and make it scale to zero? it is not working for me.. can you please tell me?
Use gumball- click the z scale handle, enter zero and hit enter.
@@Rhinoceros3d thanks for the reply
I know nothing about moulds, so I don't understand how this could be a mould since it isn't planar
Molds very often have non planar parting lines. As long as the halves match up you are good to go.
@@Rhinoceros3d how is the other half generated? Of can you point me to a video of a complex solid where its cut in half? Like a propeller?
@@funwithfamfun you'd start from the parting line of the part, and build one parting surface, then copy it for the other half- you'd then split your part and connect each copy to one side or the other. everything outside the parting line is identical top to bottom so they match up.
It would be really great if you could prepare a wholesome video, where both parts of the mold would be generated. For instance - this method would be used as a mold for casting PU foam (e.g. for car seats or something similar).
@@Rhinoceros3d Any chance you make a tutorial for a Mold where both sides are not equal? For example one is the cavity and other is the Core that complete the cavity of the piece?
As others have said - video is useless, how hard is it to make a video that guides you through the full mold process with Rhino instead of these half baked tutorials and gifs lol
The video is about how to make a partition surface, not how to make a mold. The partition surface is simply one part of a complex modeling problem required to make a mold.
This tool was missing from the workflow in previous versions of rhino.
You’ll need to learn a lot more than this tool to make molds.