Creating a plane perpendicular between two points

matt_davies955

I have a drawing exercise I use for teaching with a cuboid. I want the students to be able to create what look like pipes which start on one face and flow to another.
This requires drawing a sketch on the two faces and then creating a spline between the center of these two points to use as the path for the pipe/tube. 
From what I understand I need to create a plane that passes through these to points in order to create the spline.
I can't find ho to do this. How do I create this plane?

Cheers
 

alnis

This seems like a job for the built-in 3D Fit Spline:
https://cad.onshape.com/documents/2636e9556444046757e931d0/w/16afce0507b11d39d90d789e/e/7bf4c0678d505b92ffb9c502

You locate the start and end points, then create a spline with starting/ending directions based on the look that you want. If you need more control, @Evan_Reese's fit spline might be useful: https://cad.onshape.com/documents/cd51f29c6937305f86a9df95/w/86ce0e7568faacfe3963e35b/e/44de484ba0acba52f99fcfc5

eric_pesty

I think you'd just use a 3D fit spline between the two points. It's in the "curve" menu (under helix).

glen_dewsbury

You can use a 3D fit spline from point to point with out creating another plane. A spline with only 2 points with out any start or end magnitude is a line in space. Use the implied point at one end or the other or midpoint for sketch plain to draw pipe profile.

matt_davies955

Thanks for the notes. I've got this one (is it just me or do you have to really drag those direction arrows out a long way for small movements), but was hoping I could add more 'free flow' to the path. For example, If I was running a real pipe or wire I would want to be able to change the direction of the path at multiple points along its route - is there a way to trace a path in 3d within Onshape ( I remember being able to do this in 'other' CAD programs)?

Thanks for the responses here

EDIT: Apologies, I just notes the link above for @Evan_Reese tutorial, thank you