Coil winding

[JWayman]

Hello,
I am trying to model a coil winding: a helical layer on a former, followed
by another helical layer at a larger diameter and so on.
I have figured out the helical layer. I can even get it to increase in
diameter as it goes along the drum. I can't get how to increase diameter and
start winding at the new diameter and in the other direction along the curve
to get the second layer, then increase diameter again for the third, etc.
I hope that makes sense.

Any ideas?

Thanks,

John

[frederick.burke]

Hi John,



I don't have a solution, but I do have a recommendation.



Don't do it. Helical features take up huge amounts of memory.



Whenever I am working on a coil, I just revolve a stack of doughnuts



And nobody ever knows the difference. I once had a 400 part assembly



on my screen. My springs were real springs and my helicoils were real
helicoils.



I had a total of 11 helical sweeps in my assembly. I replaced each with
a stack



of doughnuts and the difference in performance was like night and day.



Now I never use helical sweeps in parts that are going to be assembled
into



something else.



Best regards,



Frederick Burke

[gjackson]

Draw each "layer" of your coil winding and ignore the layer to layer
transitions for a second. After you have created each layer, go back and
create transitions between each layer (which is a tangent to tangent
transition). I would use a one wrap transition between each layer for ease
of design.



i.e. 4 layer coil would consist of 4 helical sweeps (standard layers) & 3
helical sweeps (tangent to tangent) to combine layers.



Hope that this makes sense.



Greg Jackson
Design Engineer - Material Handling
BuntingR Magnetics Company
316.284.2020, ext. 141

[gkbeer]

You can do it with a pair of graph features to control the winding helix and
z transitions.
The initial feature will be a curve created by equation, and the equations
will include evalgraph functions.

Once the curve is created. A vss feature can be created on that.



On Mon, Nov 1, 2010 at 8:24 AM, Wayman John (external) <
> wrote:

>  Hello,
> I am trying to model a coil winding: a helical layer on a former, followed
> by another helical layer at a larger diameter and so on.
> I have figured out the helical layer. I can even get it to increase in
> diameter as it goes along the drum. I can't get how to increase diameter and
> start winding at the new diameter and in the other direction along the curve
> to get the second layer, then increase diameter again for the third, etc.
> I hope that makes sense.
>
> Any ideas?
>
> Thanks,
>
> John
>
>
>
>