Parametrically defined curves

I am creating a part using loft, "morphing" one sketch into another, each
sketch in it's own plane. Is there a way to parametrically define the
dimensions of the current sketch based on the x-axis position of the current
reference plane? For example, if I place 10 reference planes, each parallel
to the right plane, and 50 mm apart, is there a way to know the absolute or
relative X (or Y,Z) position of the current plane, to be used in an equation
describing the current instantiation of that curve? As a simple example,
place a circle in the first plane, and I want each subsequent circle on the
10 reference planes to be of a radius equal to 0.95 * X-position +10mm.



Any Ideas?

 

Yes, if you double-click the plane in the Feature Manager,
you will see the dimension appear in which to enter into
your equation.

Mike Wilson

 

This might also be a good place to use a layout sketch, where you place your
planes perpendicular to lines or at points in the sketch, then use the
dimensions for those lines or points in your equations. Adds a sketch but
makes it a little easier to see what's happening when you, or someone else,
comes back later.

Jerry Steiger
Tripod Data Systems

 

maybe it is OT, but from your subject "Parametrically defined curves" I
wonder if
my MathSurf + SketchFile macros wouldn't help.
on http://www.dynabits.com/sw/free/macros/sketchfile/index.htm you can see a
wing, lofted from airfoils profiles, all done with these 2 free macros.

If you need associativity, well, equations might be a solution...
Another would be to make SketchFile associative by creating a "Macro
Feature". Contact me if you're ready to pay a bit for this.