please tell me how to change planes. i want to construct a 1" radus, starting at y1, thru z1 and ending at -y1. then end the half tube at x4. it would be a half tube beginning at x0 and ending at x4 1" radus. if this not possible please tell me where i can find answer.thanks

On the CAD side: Special/NC-Cam / Axis

on cad side. i am trying to draw

Easiest way is to rotate the geometry to always draw in the x-y plane.

See attached pic.

thanks to all that answered.