topic Re: Cam constraint isssuer in Inventor Forum

Cam constraint issue

wanumej4 — Mon, 16 Mar 2026 21:48:49 GMT

Anyone know how i can stop the rocker from teleporting location on the cam. I want it to follow the cam whilst it is on the top but it always telports to the side.

Re: Cam constraint isssuer

kacper.suchomski — Sat, 14 Mar 2026 22:36:20 GMT

The key is to position the component before creating the constraint.

It can also be helpful to add an angular constraint that defines the possible range of positioning relative to another element (or workplane).

Re: Cam constraint issue

johnsonshiue — Mon, 16 Mar 2026 21:50:47 GMT

Hi! Please share the Inventor files here or with me directly at johnson.shiue@autodesk.com. I would like to understand the constraining behavior better.

Many thanks!

Re: Cam constraint issue

wanumej4 — Thu, 19 Mar 2026 14:32:11 GMT

Hi, i have sent the files onto your email, please let me know.

Re: Cam constraint issue

johnsonshiue — Fri, 20 Mar 2026 01:27:07 GMT

Hi John,

Many thanks for sharing the files! Without disclosing the detail here, I can comment on the issue as the following.

I took a quick look at the assembly. I think I know where the problem is. Though the behavior looks wrong in terms of the assembly design intent, it is actually a legitimate solution from Assembly Constraint Solver’s perspective. The rocker subassembly has way too many degrees of freedom. A limit angular constraint can help restrict the movement. Just open the rocker subassembly, add the angular constraint between the rocker arm and the bolt, and set a reasonable limit range. It should work better.

Thanks again!