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How to make a elliptical-section coil?

14 REPLIES 14
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Message 1 of 15
tormy.vancool
257 Views, 14 Replies

How to make a elliptical-section coil?

I'm struggling with this since coils seem to be only circular.

 

My need is to creata a coil with a circular-section wire.
But the section of the coil itself should be elliptical.


how can I do it please?

14 REPLIES 14
Message 2 of 15

Take a look at the attached file. Just edit the user parameters and the CoilForm sketch to your specs.

HughesTooling_0-1699617984616.png

 

Mark Hughes
Owner, Hughes Tooling
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Message 3 of 15


@tormy.vancool wrote:

 

My need is to create a coil with a circular-section wire.
But the section of the coil itself should be elliptical.


how can I do it please?


Bit confused by this. I think you want an elliptical coil, I'm unsure about the bit about section.

Try the attached. I don't really like it but using path with guide rail doesn't keep the round section.

This is with a guide surface.

HughesTooling_0-1699619026462.png

 

And this with a guide rail. Creates a single surface but very distorted. You might get better results is the ellipse is more circular.

HughesTooling_1-1699619102708.png

 

 

Mark Hughes
Owner, Hughes Tooling
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Message 4 of 15

Mmm ... ys it's distorted. Too much distorted. the resulting profile should be very linear ... 

Message 5 of 15

Just for reference this is what I get with a more circular ellipse (45x50) and just using a guide rail. File's attached.

HughesTooling_0-1699619376905.png

 

Mark Hughes
Owner, Hughes Tooling
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Message 6 of 15

Yes this is a workaround indeed. I understood how it works. Thank you so much for the effort. However it's very cumbersome and not precise. I hope in the future Fusion 360 will have the possibility to add the parameter directly in Helix to get better results

Message 7 of 15

Here's the file I posted to your other post. Note, you could save this as a part then insert into other designs to reuse so you don't need to recreate each time.

HughesTooling_0-1699620607657.png

 

Mark Hughes
Owner, Hughes Tooling
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Message 8 of 15

???

See Attached.

Message 9 of 15

Guys both of you have posted now the solution. That's way better.

I have to go through all what you did in order to learn how to do it. because the important is to understand each step

Message 10 of 15

I've found a bit of a problem. This method using a Sweep to create a path tends to fail if you don't use full turns. The use of pipe rather than a sweep for the wire is good but doesn't seem to work well with partial turns.

With 30 turns I get a good coil.

HughesTooling_0-1699622303559.png

 

But with 29.985 like your sample design i get this. Probably only a display problem but using detail controls and setting the mesh to high doesn't help.

HughesTooling_1-1699622537214.png

 

 

Mark Hughes
Owner, Hughes Tooling
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Message 11 of 15

@TheCADWhisperer Don't know if you did this for a reason but having the sweep the same diameter as the longest side of the ellipse means you get a broken path and a segmented pipe.

Clipboard01.png

If you make the sweep a bit bigger you get a single path.

Clipboard03.png

and no segmentation.

Clipboard02.png

 

Mark Hughes
Owner, Hughes Tooling
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Message 12 of 15

Thanks to you guys really by heart. I was able to make it. Without your hint, it was for me impossible

tormyvancool_0-1699623474670.png

 

Message 13 of 15

@HughesTooling 

Oops, I was in a hurry and didn’t check.

This is so much easier in Autodesk Inventor Professional that I got aggravated jumping through extra steps in Fusion (that didn’t work anyhow).

Message 14 of 15

I have Inventor now, but I'm getting used to Fusion more because I had to finish some project on it ...

Message 15 of 15

Guys thank you so much. I completed the video I was working on it to show the anatomy of a Vacuum Tube.



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