sketchings in 3D?

piri_roter

Hi,
I'm new to onshape and I would like a wireframe of a pyramid (not  solid one
which can be made with the loft cmd) For the base I have a circle
extruded along a square. But how can  I get into the
height?

pi

philip_thomas

Pi - not sure exactly what you're looking for, but this should get you going in the right direction

https://cad.onshape.com/documents/672037842438121da6a58da4/w/2a32e9a41cc863f9fc09d1a7/e/6500938b95083602753da705

philip_thomas

Pi - in most solid modeling systems, planes can be created to meet sketching needs.
In this model, plane 1 was defined using 3 points and allowed us to draw the path between the base and the apex.

 

philip_thomas

Pi - not sure exactly what you're looking for, but this should get you going in the right direction

https://cad.onshape.com/documents/672037842438121da6a58da4/w/2a32e9a41cc863f9fc09d1a7/e/6500938b95083602753da705

piri_roter

it hits the nail on the hat, but I'm dont know the get into the height
means how to rotate sketch plane 3?

philip_thomas

Pi - i apologize if i have not correctly understood your question but here goes . . . 

Plane3 was created normal to the line that goes from the corner of the base to the apex of the pyramid.

You can pick up the rollback bar and step through the regeneration of the part studio feature by feature.

piri_roter

Thanks, you got it. I'm glad with the rollback bar - it's very useful feature in OS.
But how is the apex created? I wasn't able to sketch anything that isnt in the sketch plane (groundplane of pyramid)...

Pi

philip_thomas

Pi - in most solid modeling systems, planes can be created to meet sketching needs.
In this model, plane 1 was defined using 3 points and allowed us to draw the path between the base and the apex.

 

piri_roter

Philip, thanks, now I've got it.