topic Re: Missing construct items: Axis/plane perpendicular/orthogonal to two axes/pla in Fusion Design, Validate & Document Forum

Missing construct items: Axis/plane perpendicular/orthogonal to two axes/planes

Anonymous — Sat, 21 Mar 2020 09:24:39 GMT

The two best ways to define a new plane or a new axis are:

New Axis orthogonal to two edges/lines/axis
New Plane orthogonal to two planes/surfaces

How come such basic and most obvious ways to construct new are missing or am I overlooking something?

Best

Hoegge

Re: Missing construct items: Axis/plane perpendicular/orthogonal to two axes/pla

jhackney1972 — Sat, 21 Mar 2020 18:39:21 GMT

You question is to ambiguous, please create a screen capture, anyway you can, of each condition you desire and post it. The community cannot help unless they know the orientation of the two lines to each other or the two planes.

Re: Missing construct items: Axis/plane perpendicular/orthogonal to two axes/pla

hoegge — Sun, 22 Mar 2020 09:16:24 GMT

Actually I don't think it is ambiguous or insufficiently described.

If two lines / axis / edges are perpendicular or even just in the same plan and not parallel - you can calculate the line / axis perpendicular to them both by calculating the cross-product:

https://en.wikipedia.org/wiki/Cross_product

Similarly with planes, if you take the cross product of the normal vectors to the two planes, you get a normal vector defining the plan perpendicular to both:

So it is a request to add the functions to Fusion to create a new axis orthogonal to two others and to create a plane orthogonal to the to others

Hoegge

Re: Missing construct items: Axis/plane perpendicular/orthogonal to two axes/pla

laughingcreek — Sun, 22 Mar 2020 16:19:59 GMT

I think it would be interesting to know why @Anonymous thinks these are the "two best ways" to achieve this. ok, I don't want to know in general, but rather in the context of parametric modeling. Maybe I'll learn something new today. An example would be great.

Re: Missing construct items: Axis/plane perpendicular/orthogonal to two axes/pla

hoegge — Mon, 23 Mar 2020 09:15:33 GMT

Writing for @Anonymous (my workplace alias). If you have two intersecting lines, it can often be useful to have the line perpendicular to them - i.e. to the plane they define. E.g. to create a new origin like construct.

The same with two crossing planes - to generate a new plane perpendicular to them - like the Z plane to the X and Y plane.

Also you can't even create an axis at a point on a plane - only on face.

So all in all you are way to limited in creating new construction items from other items.

Re: Missing construct items: Axis/plane perpendicular/orthogonal to two axes/planes

lachlan.ahrensZNTNG — Fri, 15 Oct 2021 04:50:16 GMT

I've also encountered this issue, specifically needing an axis perpencidular to two intersecting axes, where no face is involved - only the sketch plane where the two axes (sketch lines) live.

My workaround is:

Create a plane offset from the sketch plane (by any non-zero distance)
Create a sketch on the offset plane, project the point of intersection of the two axes
Create an axis through two points (the intersection of the axes, and the projected intersection point)

It's an annoying workaround, because the tool seems so close. "Axis perpendicular to face at point" should allow selection of a plane as well.

Re: Missing construct items: Axis/plane perpendicular/orthogonal to two axes/planes

HughesTooling — Sat, 16 Oct 2021 18:52:32 GMT

@lachlan.ahrensZNTNG If I've understood, you could just enable 3d Sketch and draw a vertical line at the intersection of the 2 lines in the sketch. You should be able to use the line for anything you can do with an axis.

If you find you really need an axis the line can be used.