Plane parallel to another plane and tangent to a surface

joseph_newcomer

I have here two 3-point planes which are defined by the intersections of the arc which is the circle and the edge where the fillet starts.  I want two planes, parallel to these but tangent to the curve.  The goal is to place a sketch on the top plane (the one that is tangent to the curve) and extrude from it, cutting some holes into the feature underneath. I have not discovered any way to do this yet.

Then, having cut the hole (a rectangular hole) into the feature, I want to create a plane offset from it, about 2mm from the back of the hole, moving towards the front of the picture.  I want to use this plane to propagate a geometric in the (light-colored) tilt mechanism so I can cut another hole in the correct place.  There will also be a symmetric hole in the opposite side.

The feature that is the funny bulge is going to hold a Hall sensor.  The feature cut into the rotating tilt mechanism is going to hold a neodymium magnet.  When the unit is powered down, the tilt mechanism will flop to one side or the others; this will help me detect which side it has flopped to.  It will also inform me when I have hit the stop, acting as a solid-state limit switch.  The idea is when the unit powers up, it will detect which way it has to move the tilt mechanism to get approximately vertical (there is a fine calibration that takes place after that).  The magnet is very small, and must be placed directly over the sensor.  They are separated by about 1mm 

john_mcclary

I believe you are looking for the 'plane point' option

mouseover the middle of the curve and you should get a mid point, then select the plane you want it parallel to