Creating a slope along a circle

Creating a slope along a circle

Davidf01
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Message 1 of 42

Creating a slope along a circle

Davidf01
Advocate
Advocate

Hello I have another question for you. I'm trying to model a travel mug lid and need the top of the lid to slope up towards the siphole while mantaining the radius of the lid. Does anyone have any idea how to achieve this? 

 

Thanks for your help.

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Replies (41)
Message 21 of 42

Anonymous
Not applicable

So this turns out to just be an appearance problem/bug (if select body in browser the solid infill will appear), related to plastic for the material appearance.  Not sure how this got set to plastic to begin with, but the material that is always used in my models by default is platinum, so for your original model I right clicked on the body in the browser and choose Appearance or Materials, and added platinum and clicked and dragged that platinum icon onto the body (I think I first right clicked on the plastic icon and choose to de-assign/deselect it.)

Jesse

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Message 22 of 42

Anonymous
Not applicable

Really cool about making stuff like that, can I ask what kind of material/molding process is used?

Jesse

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Message 23 of 42

Davidf01
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Advocate
Well you are correct. I changed the material and it worked correctly. I changed the material to plastic when I started the project.
Message 24 of 42

Davidf01
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The material for this is a polypropylene and a injection mold is used. Do you know how I can start a new sketch on the face of a already existing body? Every time I try to project it is always selecting one of the model planes. I thought I could just use project and click a face?
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Message 25 of 42

Maowen_Zhang
Autodesk
Autodesk

@Davidf01, there are multi ways to create a sketch. 

 

1. Start most all sketch commands (create sketch commad or project, line, etc.), then the work planes show up, you can select work planes and also a face on a body. Please let me know and help to capture an image if it doesn't work. Thanks!

2. Right click mouse to select a face first, then click "Create Sketch"

 

createSketchOnFace.png

Lori Zhang (Fusion Development)
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Message 26 of 42

Davidf01
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Advocate

Maowen_Zhang

 

Thanks for the reply. There seems to be a problem with my file when I try to create the sketch it wont let me select a face no matter what I do it always selects

one of the sketch planes. This is very strange because I was able to select faces before but now it wont let me. Is the anyway to insert this whole model into a new

design? If i start a new design it will let me select faces on any new bodies I create to sketch on.

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Message 27 of 42

Maowen_Zhang
Autodesk
Autodesk

@Davidf01, yes, Fusion supports inserting one design into a another design, which is XRef/distributed design.

 

As below image, right click the design on data panel (or drag it to graphics canvas) to insert it to current opened design (need to save first).  The inserted design is a reference, need to open it to edit, so in your case, you could right click inserted design in browser and use "Break Link" to fully import the design contents into new design file.  

 

InsertDesignAndBreakLink.png

 

Could you also share your file which has the issue, we could try to check what the problem is ?  Could you also double check whether the "Body Faces" filters are checked? Selection Filters are used control what kinds of objects are selectable in order to select specified type objects easily.  

 

selectionFilters.png

 

 

Lori Zhang (Fusion Development)
Message 28 of 42

Davidf01
Advocate
Advocate

Ok I tried the insert into new design and that didn't work. I also checked to make sure that Body Faces was selected under my filters and everything was selected like you show in your picture. When I click on a face then try to sketch a circle it wont sketch on the face I selected, it always brings up the sketch planes.

Here is the link to the shared file. Im not sure what it going on with this file hopefully you can figure it out. I'm going to try and take some screen shots to post pictures. Basicly when I try to sketch on the top face of this body it wont select the face and selects one of the sketching planes instead.

 

http://a360.co/1Ty6bWW

 

Thanks for everyones help.

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Message 29 of 42

Maowen_Zhang
Autodesk
Autodesk

@Davidf01, the reason is that the top face isn't exactly a plannar face, sketch requires plannar face. 

 

I tried to make the sketch line as below to horizontal/vertical, and then edit the revolve feature (by remove axis and reselect it again). Then it works. Please take a try and share any further comments, thanks for sharing the file! 

 

Make the sketch line as horizontal/vertical, to make sure resolved top face are plannar. 

horizontalOrVertical.png

 

Edit Revolve feature by remove axis and select again

EditRevolve.png

 

Lori Zhang (Fusion Development)
Message 30 of 42

JamieGilchrist
Autodesk
Autodesk

Hi Davidf01,

 

glad you're making some progress on your design and that you're getting some great tips from Jesse (jjurban55) as well as some other Autodeskers.

 

So I took a look at your design and a couple of observations:

my first one was that you are likely going to do some sort of polymer production process:  rtv mold, injection mold, 3D print-maybe!?, but probably not thermo formed (too thick a part).

Considering the first two options mentioned above, I see a couple areas where your model will need fine tuning to get a proper mold made, and that is drafting your model to get a uniform finish on your part and to get the finished part out of your mold without marring your finished surfaces.

 

So I wanted to show you another way you can get the result I think you're after.

in the image below I'm showing a sketch that matches your design intent sans corner radii, as I added them as solid modeling features rather than sketch elements.

 

The one thing I like to share with beginner users is keep it simple.

Try and distill your sketches to the most simple, base geometric form whenever possible.  In the case of your mug lid, I had forgone the relatively complex sketch in your model and just used a simple circle to create the first two features that are the base of the lid design.

 

Build your design as primitive geometry and use the power of the modeling features to add detail; rounds, draft, shell for part thickness, etc.  Although your design is not too complex, keeping this sort of detail out of the sketch when you're working with more complex designs will serve you well if you have to troubleshoot a failed feature in more complex models.  In time you'll learn how much detail you can add in a sketch to capture critical design intent and where you can rely on the 3D modeling features to get the intent you want, there is no magic formula here, but keeping it simple is a good place to start.

 

Feel free to play with the example I built and step back and forth through the timeline to see exactly the steps I took.

 

hope this helps.

 

p.s.   the "hollow" look in your cross sections is from the ambient occlusion setting, turn this off and all should be good. Also to create a sketch on an existing surface the surface has to be planar, if the surface has any "out of flatness" you can't sketch on it.

 

 

 

travel mug lid_jg.png

 

hope this helps,


Jamie Gilchrist
Senior Principal Experience Designer
Message 31 of 42

Davidf01
Advocate
Advocate

, this semmed to do the trick im able to sketch on the surface again. I'm not sure how that got out of wack but I know now how to

fix it in the future.

 

Thanks

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Message 32 of 42

Maowen_Zhang
Autodesk
Autodesk

Great! Go Fusion 360! 🙂 

Lori Zhang (Fusion Development)
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Message 33 of 42

Davidf01
Advocate
Advocate

,

 

I have checked out your sample design. I agree with you on keeping it simple and you have some great ideas on how to rework some of

this design. I liked the rib you used. I didn't have a rib feature in my other CAD application.

 

The lid that we have been working on to address some of these problems is a very simple version of with the actual lid is. The actual lid had a few

other featurs add that are not in this design yet. There s a sip hole plug that has to be in this design and a way it attaches to the lid. There is also ribs

on the inside that have to be added so when the travel mug collapses the cup sections stop at the same point. You can see the current lid

at www.collapse-a-cup.com That lid will be changed to this new lid once the design is complete.

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Message 34 of 42

Davidf01
Advocate
Advocate

Back to my first question. I just relized that the split body feature I used to make the slope on the lid is still using a planer (straight) cut across the lid.

What I was looking to do in my first question was to do a radial cut across the lid with a small elevation to get the slope in the lid. This would be something

like the coil cut operation in Fusion. The two cuts do have slightly different effects on the model being cut. I'll see if I can make a screed grab.

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Message 35 of 42

Anonymous
Not applicable

Hey David, to to a radial/orbital cut of the lid, look at this guy's video of using a cylindrical Tspline mesh as a grid for 3D sketching of a spline, that could then be used as a sweep path to make a surface that would be used as a split body tool for your model. 

 

 

That gives you infinite control over the 3 dimensional spline path, whereas you could just use Include 3D geometry for the edge of a coil from the Coil tool if you just want a simple helix like curve.  

Jesse

Message 36 of 42

Anonymous
Not applicable

Just thinking out loud here, another way would be to use several offset construction planes, each at a different elevation, with a point located on a projected circle in each plane, these points then serving as points to snap a 3 dimensional spline onto, that again would serve as the path for a sweep.

Jesse

Message 37 of 42

Davidf01
Advocate
Advocate

Great stuff here guys, I'm learning a lot. Thanks for the help. I'm pretty sure both of these will work just fine. I just have to figure out the best way to do it.

I was thinking is there a way for me to shape a tspline cylindar to what I want and then copy one of the tspline edge loops to use as the 3D sketch?

That would be the easiest way to get a 3d sketch.

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Message 38 of 42

Anonymous
Not applicable

Man I'm learning a lot too, that's an awesome idea!  Here I extruded a simple Tspline cylinder then used Modify to move the node points up or down.  Next I created a sketch on an arbitrary plane and used Include 3D geometry and selected each top edge segment.

wow1.jpg

wow2.jpg

 

which is available then in Model or Patch environment to create a sweep:

wow3.jpg

 

The Patch sweep can be a little picky about fully closed loops which is easy enough to work around, but found in Sculpt environment didn't have a problem creating a closed loop sweep.  Note in both of these, going around the loop in one direction can give a strange result, whereas then trying the other direction worked fine.

wow4.jpg

 

I also wanted to try extruding two cylinder Tsplines, and then selecting two adjacent node points at a time, would move them up or down together. 

wow6.jpg

 

The resulting two curves can then be used to insure the loft in this case stays level along the path (note choosing rails in the loft tool is a little tricky, be sure to uncheck Chain, and add a new input button for each rail).

wow5.jpg

 

Again really great idea you came up with David!

 

Jesse

Message 39 of 42

Davidf01
Advocate
Advocate

Wow it did work, thats great. I'm thinking I just need the first part you did and then I could use that as a path to do some kind of loft cut

or something. You lost me on a few of those steps but I will check it out when I start up fusion later. it looks like some of these idas could be pretty helpfull

depending on the project. It would be great if fusion let us use a spline and do a radial cut operation with a elevation added to the cut but I think we are coming up with

some good work arounds.

Message 40 of 42

Anonymous
Not applicable

When you right click and choose Edit Form in Sculpt mode, notice the variety of options when Soft Modification is activated, that are very useful for getting the desired 3d curve curvature.

Jesse