Cylinder path clearance planes

[[Ma...]]

Howdy, I have a vertical cylinder that i have to measure using 2 180 deg circle paths 2 segments(see drawing or photo) When the first circle path finishes it does this slick wrap around clearance move to backtrack around the part to finish the first strategy, works great, However when it rotates the stylus to do the opposite side it tries that same clearance move but in the wrong direction making it crash into the part. I have had to resort to using single circle paths to fix the issue. Was hoping there was an easier way to do this. 

[[ni...]]

if it's work, that's fine. sometime using 170° (<180°) circle fix the problem. an other solution but not light in programmation , is to invert the path of the fourth circle, so you can earase the last clearance data 

[[Da...]]

If you are doing a second cylinder in the opposite direction, the vector of the circle points in the opposite direction. Are you doing the circle first from 0° to 180° and then the same circle from 180° to 360°, or a reversed circle from 0° to 180°? If it's the latter, that could be your problem.  

Go into the paths of the circles and see what direction your clearance directions are. Are you pulling laterally away from the surface, or going axially away from the surface?

[[To...]]

It looks like one set might be greater than 180°, in which case it will take the shortest path to get to the 2nd circle path.  I might suggest the following

clearance data +Z

circle path 1:  Start Angle 270  Angle Range 180

circle path 2:  Start Angle 90  Angle Range -180

clearance data +Z

circle path 1:  Start Angle 90  Angle Range 180

circle path 2:  Start Angle 270  Angle Range -180