assembly driven constraint and positional views

[Anonymous]

I'm trying to get an angular constraint driven buy another angular constraint, then show this with two positional overide views.

I can get two overiden positional views, no problem.  but having problems setting up the parameter constraints.    I've tried creating a user assembly constraint then changed the equation to read source equation, I cant get this to work?  (Im trying to drive the mirror (top beam fixed) hence bottom beam will move at same angle as top beam to mirror angle)  help! thanks   

[kelly.young]

Hello @Anonymous I see that you are visiting as a new member to the Inventor Forum.
Welcome to the Autodesk Community!

To be clear, you have the IN beam shooting onto the mirror and want the OUT beam to adjust as the mirror changes angle to the corresponding angle.

Mirror at 45° would be beam out at 90°?

Mirror at 30° would be beam out at 120°?

Create a plane perpendicular to the mirror surface and corresponding angles to that surface for the beams along a center axis plane using the same constraint angle parameter.

Please select the Accept as Solution button if a post solves your issue or answers your question.

[Anonymous]

Yes this is correct however there is a twist.  Unfortunately the mirror's axis is not on the face that the beam hits, if you image it rotating axis to be 300mm away the perpendicular plane moves along the mirror face.  So i'm not sure if the symmetry constraint will work?

[johnsonshiue · Accepted solution]

Hi Ben,

If I understood your request correctly, you would like to have the beam in and beam out behave like light shooting to a mirror and bouncing off. If yes, Angle:2 constraint does not make sense. Please suppress it. Next, create an assembly workplane perpendicular to the base mirror in the middle. Then create a symmetry constraint between beam in and beam out, where the workplane is the symmetry plane. Does it work desirably now?

Many thanks!

[Anonymous · Accepted solution]

Yes, that all correct and now it works, the trick was to insert an 'assembly' perpendicular plane.  (this plane can now move freely up and down the face of mirror if not exactly gimbal).    I also got an older method to work by using the first input mirror angle equation parameter and pasting it in the later angle equation.