I’m trying to create a sketch on a face that will be exported as a tool path for a robot to sand and polish a piece. 

Whilst I’m able to manually create a sketch and project the curve to the 3D surface, then export it to the robot, I’m looking for a better way to generate the back and forth moments and the arcs so they’re all the same. 

Doing this manually is a chore and I cannot suggest this to the