Non-uniform gears with 3mm teeth

[msXGLQY]

Please can someone help save me hours of my life? I need to add 3mm teeth spaced evenly in 3mm increments around a non-uniform shape (screenshot attached). 

If I use the PATTERN ALONG PATH tool, the varying corner radius' of the path mean the circle spacing differs. Currently I am manually copying & pasting hundreds of individual 3mm circle around the pattern to ensure perfect spacing.

A separate toothed gear wheel will eventually drive the shape around its path hence why the spacing is so important.

Thank you for any help and advice!

[Warmingup1953]

Please share your file. What pinion will you use?

[TheCADWhisperer]

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@msXGLQY wrote:

Please can someone help save me hours of my life? 

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@msXGLQY 

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

[Drewpan]

Hi,

Way above my pay grade to help you fix this but I am wondering what it is for? It is an interesting shape and

maybe sharing the purpose could prompt someone to suggest an alternate method that works for you.

Cheers

Andrew

[msXGLQY]

Here is the pinion and file attached, thank you. It is a jig to plot a pattern, like a spirograph drawing device

 

[msXGLQY]

Thanks Andrew, it is a jig for plotting a curve, similar to the classic spirograph drawing set!

[TheCADWhisperer]

@msXGLQY 

This curve should be at the Pitch "diameter"

OK, I found this...

and you have both convex and concave curves which means there will have to be quite a lot of "slop" for the mechanism to not bind.

Have you actually made a physical model similar to this before that did not bind in motion?

I was about to simulate the motion in Autodesk Inventor Professional>Dynamic Simulation to show the trace of the "spirograph" but I am not sure you understand what you are getting into to get this to work.

Also, the file that you attached does not include the spur "gear".

And, when I examine this sketch I observe that the arc radii do not make logical sense?

The deeper I dig - the more issues I find...

Are you familiar with scientific notation?

Why this slight angle?

Why not make use of obvious symmetry about the Origin?

(Why is it obviously not symmetrical?)

[TheCADWhisperer]

@msXGLQY 

Let's start over from scratch.

Pick a logical datum for the sketch and place at the Origin.

Fully dimension the sketch and attach the new file here.

What is this?

I find more and more issues...

[Warmingup1953]

By creating a parametrically controlled offset of your defining path and recreating one frequency of your 3mm teeth I created a surface body that I patterned on path by spacing. I then adjusted to offset parameter until I got a very close alignment of first and final pattern surface body then simply stiched all the surface bodies...Should be close enough