Coordinate plane chooses to dictate is the plane that uses interpolation of choice circular arc and plane of cutting tool compensation. G17 expresses to choose G18 of XY planar to express to choose ZX plane G19 expresses to choose YZ plane each coordinate plane pursues as follows be shown. General, acquiesce of numerical control lathe is machined inside ZX plane, CNC Milling acquiesce is machined inside XY plane. Graph coordinate plane chooses CNC MillingCNC Machining