Toothed wheel with wavey teeth ?!?

[Anonymous]

Hello,

I came to a point(part) where searching the internet did not help me. I want to create a toothed wheel which looks like the attached picture.

I tried the spurgear script but with this tool I can only create "normal" teeth. Can someone point me in the right direction on how to realize this thing?

Should I use 'patterns' maybe?

[Anonymous · Accepted solution]

Hi, sounds about right, a circular pattern of a spline.  You can see two methods of doing this here (I probably prefer the 2nd one):

http://forums.autodesk.com/t5/design-and-documentation/modeling-sculpting-my-idea/m-p/5688507/highli...

Let us know if you run into trouble.

Jesse

[Anonymous]

Wow awesome! Thanks Jesse!

I'll try this out and report back with the result.

[Anonymous]

Okay so patterns work out but I have a problem reading the drawings.

In the drawings it says "theoretical intersection". The imaginary marginal circles that illustrate the inner and outer diameter of the gear do not touch the gear.

If the gear would be in the center of these two imaginary intersection circles, it would be no problem. I could just center the spline inbetween.

But if you take a closer look you see that the distances to the intersecting circles are different.

I don't have much experience in reading drawings. Maybe there is a rule I don't know on how to interpret these theoretical intersections.

Do you have any idea?

Another problem is the outer gear. I know that the smaller radius is 3mm and the bigger one is 5mm but how do I know where these two radii intersect each other?

If I just draw a 3mm and a 5mm radius circle and connect "the most outer" point of the circle I get another gear but not that from the drawing.

[skrubol]

I think the "theoretical" might be if the saw teeth were pointed, without the 1mm radius.  (I'm not sure though either, I'm no pro.)

As far as the spacing of the 5 and 3mm radius', I think I'd start with 2 6mm circles, patterned according to the drawing (13.85 deg around a point 46.775 mm away,) create a 10mm diameter circle a bit outside the two and apply tangent constraint to the 10mm and each of the 6mm circles.  That should get you something you can trim and pattern.