Approach vectors

[[St...]]

I'm trying to understand approach vectors. I've got cylinder 3 on the XY plane at +30 degrees from X axis. The RDS head is at A -30, B -90. It's approaching the cylinder at a weird angle and crashing the chamfer area. I want it to approach directly in line with cylinder axis.

[[Ri...]]

Since it is not square to any of the sides of the cube, this is where you will need to have a significant amount of clearance distance for it to travel along the axis of the holes. 

[[Ma...]]

What value is in "Cleareance data" for approach? I use 0 for cylinders and curves - with non-zeroe value it's making bad movements.

[[Pe...]]

It's approaching from your clearance plane.  You have two solutions that would work for it:

Since it is an angled hole you can use clearance distance.  You probably want to turn on the graphics to see what it will do here:

 

Then you can set a clearance distance that it will go to before entering the feature:

 

Your other alternative would be position points:

Just make sure you have one before and after your circle paths.