topic Re: Constraints orientation bug when suppress/unsuppress part in Inventor Forum

Constraints orientation bug when suppress/unsuppress part

n_bonvin — Mon, 08 Apr 2024 08:23:57 GMT

Hey everyone,

I'm having a little issue with the constraints I place between parts and sketches.

I have different rules that supress and unsupress parts when needed, so the constraints on these parts are recalculated or updated each time suppress or unsupress happens I think.

The issue is the following, each time this happens it is the lotery of the directions in the orientation of the constraints. Sometimes it is flipped 180 degrees, sometimes not.

For example the two following situations are obtained with exactly the same constraints.

Do you have any Idea so that this does not happen ?

Thanks in advance for your help !

Nicolas

Re: Constraints orientation bug when suppress/unsuppress part

kacper.suchomski — Mon, 08 Apr 2024 08:41:29 GMT

It's better to create constraints between faces, surfaces and workpieces.

Re: Constraints orientation bug when suppress/unsuppress part

n_bonvin — Mon, 08 Apr 2024 08:50:13 GMT

I constrained the parts using plans that I created in the parts i'm constraining. Do you think this is the issue ?

Re: Constraints orientation bug when suppress/unsuppress part

kacper.suchomski — Mon, 08 Apr 2024 09:32:55 GMT

I have no idea what you're doing based on your description alone.

Re: Constraints orientation bug when suppress/unsuppress part

n_bonvin — Mon, 08 Apr 2024 10:00:48 GMT

here I did a screencapture of the issue.

(view in My Videos)

So the problem is that the set of constraints can be understood in two directions but I don't know how to control these two possibilities. I had the same problemwith another part I tried to constraint before.

Re: Constraints orientation bug when suppress/unsuppress part

kacper.suchomski — Mon, 08 Apr 2024 10:19:20 GMT

Mate & flush constraints have only one direction.

There are several types of angular constraints, which allow you to define the number of factors influencing their work.

Re: Constraints orientation bug when suppress/unsuppress part

n_bonvin — Mon, 08 Apr 2024 11:43:33 GMT

Does anyone else have an idea on how to solve my problem ?

Re: Constraints orientation bug when suppress/unsuppress part

johnsonshiue — Tue, 09 Apr 2024 23:47:25 GMT

Hi! I am surprised by the behavior. It should work regardless. If possible, please share the files in zip here. I would like to understand the constraint orientation issue better.

Many thanks!