create plane between two points and normal to curve

evan_phinney

Is this possible? Maybe with a feature script?

I know about curve point, but I would like for it to be on two points either side of a spline curve and I can only pick one or the other. I would like the plane to be normal to the main curve where it passes the points.

Document example: https://cad.onshape.com/documents/8ccc19394d7399f1c1311a37/w/51659460d1e45ef2e6166b9a/e/4b847c061b5bea0edaf8728a

eric_pesty

Here's one way to do it (at least I think that's what you were asking)...
It does take a few steps to get construction geometry in place, you can use either the plane with point curve or the multi-mate connector FS which lets you re-orient the secondary axis which might be helpful if you want to sketch on there after...

https://cad.onshape.com/documents/9d6b2a5e3c8701a552458cbd/w/33dedbaf633ed2e9281ea224/e/9561dba6f414c74135f3d02b

However I don't have any context for what you are trying to do but I wonder if it wouldn't be easier to try to define a plane first and create your curves afterwards...

evan_phinney

@eric_pesty that is close but not quite it. And I think I have figured it out... Brainstorming yay!

If you  look in my linked document it has been completed to my liking. I created a 3D Fit Spline between the two outer endpoints, made a Point Normal Plane midline on that curve. Started a new sketch on this plane and projected the middle curve and one of the outer ones onto the sketch. Then with a creative use of the Trim tool I got an intersection point, plus the end point of the middle curve. Then just a quick line for "normal" reference for the new plane. Finally, a Curve Point Plane using the midpoint of the previous 3D spline, and the line made in the last sketch.

evan_phinney

eric_pesty said:

 create your curves afterwards...

In the actual PS I'm working in, the curves are already defined and cannot be changed.

eric_pesty

@evan_phinney
Glad you figured it out. The "sketch6" mate connector in my sketch is actually what you were looking for I think. Similar process except I skipped creating your "plane3" by using an MC directly. And I just created a line segment "normal" to the middle the curve (instead of a convert/trim)