Creating a surface to extrude

mario_darceuil

I wanted to extend the hind legs of the deer; firstly I tried drawing a surface ( outlined in image in construction lines- added so you can see where ) to extrude using the spline tool but the surface was not created. Secondly I tried extruding the under face of the hind legs but this did not pick up in extrude.

Please help.

Frustrated.

https://cad.onshape.com/documents/1ccfeff9abed70141ea77cd1/w/073c1864d259ca816552af25/e/50fee340bc1c47de3ebf9eb9

owen_sparks

Hi @mario_darceuil

Is this what you're after?

If so there a a couple of things to fix, and a few names / terminology things to consider.

Surfaces are infinitely thin so what we're looking for is a solid not a surface.

To generate that we want an extrude, but of a sketch region not a surface.

To get a sketch region we can extrude we'll need it to be enclosed.  (It'll then turn solid grey as in the image below.)

To get the enclosed region we need to do three things.

(i) Convert your reference geometry to standard geometry.

(ii) Give it a top edge.  (The "use" feature created this for us)

(iii) Make everything join up.  Your points were placed near the existing deer, but not precisely on it. So I added "coincident constraints" in the sketch.

We can then do an "extrude-add" of that new region to add it into the original part.

Here is the sample doc I used

Hope some of that helps.

I highly recommend one of Cody Arstrong's "sketch fundamentals" webinars or working through the learning center examples to give an overview of good workflows here

Happy CADing, and shout if you need help.

Cheers,

Owen S.

owen_sparks

Hi @mario_darceuil

Is this what you're after?

If so there a a couple of things to fix, and a few names / terminology things to consider.

Surfaces are infinitely thin so what we're looking for is a solid not a surface.

To generate that we want an extrude, but of a sketch region not a surface.

To get a sketch region we can extrude we'll need it to be enclosed.  (It'll then turn solid grey as in the image below.)

To get the enclosed region we need to do three things.

(i) Convert your reference geometry to standard geometry.

(ii) Give it a top edge.  (The "use" feature created this for us)

(iii) Make everything join up.  Your points were placed near the existing deer, but not precisely on it. So I added "coincident constraints" in the sketch.

We can then do an "extrude-add" of that new region to add it into the original part.

Here is the sample doc I used

Hope some of that helps.

I highly recommend one of Cody Arstrong's "sketch fundamentals" webinars or working through the learning center examples to give an overview of good workflows here

Happy CADing, and shout if you need help.

Cheers,

Owen S.