Plane tanget to a sphere?

[JetForMe]

I'm trying to make a little face out of a sphere, with little OLED displays for eyes (I plan to 3D print the sphere). I'd like to be able to experiment a bit with the placement of the eyes, so I want to construct some features perpendicular to the surface of the sphere, and use User Parameters to dictate the placement of the features on the sphere (altitude and azimuth angles).

I thought I'd start with a plane tangent to the sphere and specify the two angles, but I can't figure out how to do that (the tangent plane doesn't recognize my sphere surface as something to select).

Any advice on how I can go about doing this? In the end I need a hole in the sphere of appropriate size, and a couple of pins on the inside of the sphere to match the mounting holes on the display board. Ideally I could also play with the angle of the display (e.g. to make the eyes look more directly forward, than looking out perpendicular to the tangent at the surface, but the width of the PCB will limit how much I can actually do that).

 

 

  

[jhackney1972]

Attached is a demo of what I think you desire.  The Plane is driven by the parameter governing the angle of the plane.  The sketch point is at the surface of the sphere and the plane is added to this point using Plane Tangent to Face at Point Construction feature.

[JetForMe]

Two things:

1) How did you create the plane in the first place? I'm unable to select my shelled hemisphere outer face as a face for the Tangent Plane.

2) It would take two angles to fully specify where on the sphere the plane should lie.

[jhackney1972 · Accepted solution]

The silent video will show how to create a plane on the surface of a sphere at a point.  The Point is now controlled by two angles as you suggested.  Model attached.

[JetForMe]

My Fusion must be broken, I can't select the face of my hemisphere.

[TheCADWhisperer]

@JetForMe 

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

[JetForMe]

I tried again after restarting Fusion and it worked. Thanks!