Hello Michael,

Back again with my filleting problems.

I'm trying to do the sweep from a .4375 fillet to the 1/8" fillet.

I made the basic body shape with both a 1/8" fillet and 7/16" fillet and then copy the curve pieces and swept them to make the blend patch.



The problem is that I copied the .4375 arc piece, but it's not really in the right place. It should start roughly where I marked it.




I could accomplish what I want if I could move the large arc piece perpendicular to the sweep curve into the right place in the right orientation. I'm not exactly sure how to do this. I can guess some ways, but maybe there is a preferred method. I know can put a plane or line perpendicular to the curve it the right place, but not sure how to re-orient the piece. C-plane there perhaps?

Also, when I start piecing things together I'm trying to decide the best way.

1) I can lay the sweep surface on top of the large fillet piece and make little patches to fill the holes.



2) or use the surface to trim the 1/8" filleted body. Cut it up and cut up the 7/16" filleted piece and then glue the pieces together.




Which is best?

Hi Jeff, so if I understand what you want correctly, you can just use the regular Transform > Rotate command to position your larger arc piece perpendicular to the curve.

To do this, go to the Top view, it should look like this:



Drag one of the large arc pieces and grab near the endpoint and snap it on to the curve where you want it, so it will look like this:



You can now use the Transform > Rotate command to rotate that curve to be perpendicular to the curve. The rotate command will use 3 picked points - for the first point for the rotation origin pick the end that you placed on the path curve. Then for the first reference point, snap that on to the opposite end of the arc, and for the end reference point snap that on to the perpendicular line off of the curve - note that you need to have "Straight snap" enabled in the bottom toolbar for that kind of snap to kick in.

So the 3 rotation picks look like this:




There's also a command Transform > Orient > Line to Line which kind of combines moving and rotating together in a convenient way, you could also use it for this job, some notes on how that works here:
http://moi3d.com/2.0/docs/moi_command_reference8.htm#orientlinetoline

Orient Line to Line also combines scaling of the result by the difference in length between the 2 lines that you pick, for a case like this you would want to disable scaling by setting the option for Scaling: None.


> Which is best?

I'm having some difficulty following along with what the alternatives are here, maybe this would make more sense if you could post the model with more of the pieces in place? The one that you posted seems to only have just the sweep-fillet piece alone.

- Michael