Trim surface normal for sweep

[Steven Sutherland]

Hello All,

 

I need to produce a csys on a the surface boundary that is normal to a surface. The trimed edge of the surface is a free form curve. The csys should also be normal to the trim edge boundary of the surface at that point.

 

Please help!

[crazy^millman]

could you explain this better csys not sure what that is suppose to mean.

[Brad St.]

Are you looking for a coordinate system? Do you want to orientate the part to a specific point on the curve?

[Steven Sutherland]

Yes … as coordinate system (csys). Sorry about that.

 

More specifically, what I'm trying to do is sweep as surface around the trim edge of an automotive part. The surface must remain both normal to the surface and normal to the trim edge boundary of the automotive part at all times.

 

This surface will represent the permissible tolerance band of the part edge and the geometry will be used scribe (CNC) the trim line on an inspection gauge.

 

[ 07-13-2004, 01:08 PM: Message edited by: Steven Sutherland ]

[Brad St.]

Steve, can you post the file on the ftp site please. I'm not totally sure what you need but have a good idea. Would you be looking for just an offset curve from what's there and a ruled surface between the two curves?

[Steven Sutherland]

I have posted the MC9 file on the FTP site.

ftp://mastercam:[email protected]/Ma...C9_files/q1.mc9

 

The green ribbon is the one I am trying to reproduce in Mastercam.

 

Thanks

[crazy^millman]

Ok you are trying to recreate the max mateiral condition as a surface that is an offsets of the orignal suface so that when you do a point cloud data on the part the area between the 2 surfaces will be the good parts and the area outside of the surfaces will be bad parts in this you are trying to matain some one ideas of a 3d surface profile and would it be just as easy to do an offset of the 3d surface or you could trim the surface to line then create a curve fro mthat edge on another layer then offset that surface to the desired amount ahdn you would just need ot recreat all the wirframe for the path that it taking seems like a long process and think offset of the surface might yeild the same results or a scale of the orignal part the allowalbe devation then you have the max and the min as to models. This is my thinking on it. Busy but will lok at your model later and see what I come it while others will hopefully help you out.

[Brad St.]

Steven, please check the ftp folder and take a look at Q2.MC9. Would this be something along the lines of what your looking for possibly.

[Thad]

Brad, what kind of machine are you going to do this on? We've done stuff like this before with multiple setups, since we only have 3 axis machines.

 

Thad

[Brad St.]

Thad, I'm not sure what Steve has for machines or if this is what he need's. I was just looking to see if this was the direction he wanted to go with the part or not. I take it you saw the part, are you familiar with what he's asking for? I'm not quite sure but just looking to help. Lot's of great people and advice here I've taken advantage of just looking to return the favor.

[Glenn Stephens. from CCCS]

Steve, can you post the original surface(s) that the green ribbon came from? I've got a couple of ideas, but I need to see what you're working from first.

[Steven Sutherland]

I've posted the original file its called Q11.mc9

 

ftp://mastercam:[email protected]/Ma...9_files/Q11.mc9

 

hope this helps