# Discussion Forum

## helix with rectangular cross section.

 Topics: parametric, 4.1, Geometry
RSS feed   |   Turn on email notifications   |   10 Replies   Last post: November 18, 2012 12:51pm UTC

Jason Castro

October 28, 2011 2:07am UTC

helix with rectangular cross section.

hello

I need to know how to make a helical ribbon with rectangular cross-section.

thanks

Vincent Zhang

October 28, 2011 2:32am UTC in response to Jason Castro

Re: helix with rectangular cross section.

Hi Jason:

Is this what you want? I made it by sweep a rectangle with a helix. If yes, I can upload the model.

Jason Castro

October 28, 2011 3:27am UTC in response to Vincent Zhang

Re: helix with rectangular cross section.

yes, is exactly that I need.

Vincent Zhang

October 28, 2011 3:36am UTC in response to Jason Castro

Re: helix with rectangular cross section.

this one

Jason Castro

October 28, 2011 3:38am UTC in response to Vincent Zhang

Re: helix with rectangular cross section.

thanks

Jason Castro

November 9, 2011 8:22pm UTC in response to Jason Castro

Re: helix with rectangular cross section.

ohh!

I have a problem, I get the following message: "model created with a later version of comsol"

could you tell me how to make the helix? have you any tutorial?

Vincent Zhang

November 10, 2011 1:32am UTC in response to Jason Castro

Re: helix with rectangular cross section.

Sorry for that. Below is how I made it.

First is create a rectangular in a work plane.
Second, make a parametric curve to represent the helix curve, like (cos(4*s),sin(4*s),s).
Last, sweep the rectangular with parametric curve. Pay attention to uncheck the "twist compensation".

Jason Castro

November 22, 2011 2:37am UTC in response to Vincent Zhang

Re: helix with rectangular cross section.

Hi vincent

your explanation was very successful, check it.

But I have other problem, i cant do difference between a cylinder and the agitator because disappears the figure.
I tried make a difference with each element and I realized that it can be for the sweep. I m not sure, have you any idea.

Thanks

P.D: Im doing a reactor and i want use rotating machinery model

Michael Norton

November 22, 2011 5:20pm UTC in response to Jason Castro

Re: helix with rectangular cross section.

I am having the same issue. Anytime I perform Boolean operations on an object created with sweep I get funny results - I think the surface normals are getting reversed on some of the faces. I sent a message into support, I'll post any fixes they are able to suggest.

Jason Castro

November 23, 2011 12:39am UTC in response to Michael Norton

Re: helix with rectangular cross section.

Im worried, I need it for finished my thesis.....Bad

November 18, 2012 12:51pm UTC in response to Jason Castro

Re: helix with rectangular cross section.

Guys, have you solved the problem? If so, can you please post the solution?

Thanks..

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