sufaces newbie question

[Diedesigner]

Hi all,

We are experimenting with solid modeling. I successfully imported an iges part which is made totally out of surfaces. There are c'bores in this part which need to be drilled, but they are made out of surfaces. The cylinders representing the drill body and c'bored portion are surfaces, and the bottom of the c'bore, the "flat" step is a surface also. How can I program a drill op on these when I can't seem to be able to "select" them in any manner?

I realize I'm probably missing something simple here; any advice which will point me in the right direction is appreciated.

Thanks for your help with this.

Chris

[cadcam]

Well if it were a Solid model then you could pick te center of the hole but sense it is surfaces you should make some edge curves to find the center of the hole from the surface.

[Trevor Bailey]

Create - curve - one/all edges. When prompted, select surface or surfaces. If using a single surface, drag the arrow to the edge of the surface you want the curve on.

[Diedesigner]

Thanks Trevor,

That's all I needed for now. It's much appreciated.

 

Chris

[Dan Bedore]

I have never used surfaces to drill. I would create a curve one edge where the hole is. if the curve i made was a circle i would use the center point for my drill operation. if the curve did not make a circle i would set my c plane in 3-d and creat points along entity 5 points are enough. then i would creat a arc circle three points selecting three of the points you made. then use the center of the cilcle as your drill point. don't forget to set your c-plane to top or where ever you are doing your operation from

[cadcnc]

Hi, another way to create a point in the center of an arc or whatever, is : (Create,next menu, bound.box, select the surface or curve). Set center point to "Y" and all other to "N".X0, Y0,Z0.Do it

Very helpful when the curve is in 3D...

Hope that help

[Fred from Université de Sherbrooke]

And if you have the solid option... you can try solid--next menu--from surfaces (It stitch the surfaces to create a solid...)