Solved! Go to Solution.
If your arc passes through the spline end point and is tangent to both the spline and line, that will lock down the radius value. Holding the line and spline constant, you won't be able to specify an arbitrary radius value and satisfy all the other constraints simultaneously.
You did not mention why a Sketch is not acceptable. Putting stuff like this is a Sketch is much preferred over building up a "stick model" of 3D curves, especially if you want to do associative updates downstream.
It's not impossilble the other way, but you have to take care yourself to keep everything assocative, while use of Sketch pretty much will handle that work for you.
So having "warned", the command you probably want to use in the non-sketch case for your example is "Circular Blend Curve".:
Hi @cowski1 You're right. Sorry for the mistake. Thanks!
Hi @PatMcManus Rejecting sketch sometimes is more of psychological reason A sketch looks bulky and sometimes loss of constraints seems to be a big trouble. You are right and it should be much preferred for certain cases. And thanks for your reference to "Circular Blend Curve"!
I was told that Basic Curves is non-associative, and therefore never tried to learn the set of tools. In my mind the tools are to be retired. Maybe I was wrong and should spend some time to have a look. Thanks!
Please refer to my previous thread regarding the usability of Sketch. In that thread, I showed that minor editing of conics/splines in sketch may disrupt their associativeness, leading to a disaster for the whole model.
Since that thread I began to avoid the use of sketch, especially conics/splines in sketch, although I know sketch is a very flexible and powerful tool.
I'm wondering whether there are some golden rules regarding the use of conics/splines in sketch without harming associativeness.
Hope to have your suggestions. Thanks!