Parametric design bug, or did I just build this poorly?

[i-make-robots]

https://a360.co/2qHIdkT

I built this gear with numberOfTeeth=40.  I tested it by changing to 60, then 80.  Everything was fine.

I tried to change back to 40 and the compute failed.  It seems I can only adjust upwards.

Did I do something bad?  Is this an issue behind the scenes?

Thanks!

[mavigogun]

Please Attach the design directly to your post- File>Export>Save local>Attach (located below the text field of the Post window).

[mavigogun]

I edited the Pattern Feature- not the Parameter; no error was thrown when adjusting the quantity to 40.

[TrippyLighting]

It is the tangent constraint on the fillet that is throwing the error.

Keep your sketches simple and apply fillets as solid features where possible.

This works fine and is a lot less work so a double win!

[i-make-robots]

For me the angle between teeth around the gear is the part that turns angry red.  also the half-angle value.

ATM attempting to add an attachment is crashing firefox.  Huh.

[i-make-robots]

I modelled the pitch line, then the tooth profile based on adafruit's picture:

Then I offset the belt profile by a printer compensation distance.  All of which was done parametric.

[TrippyLighting · Accepted solution]

Understood.

I stand by what I said.

Keep sketches simple.

It avoids such situations.

The file I attached to my post shows clearly how that's done. Fully parametric!

[i-make-robots]

Something about filleting after sketch (in this one specific case) feels funny to me, but I guess if the curve is parametric then it's going to match the original design.

In any case, thank you!  I'm glad this is solved and I appreciate your help.

[i-make-robots]

https://www.instagram.com/p/BqI8iXCni3x/