With G73 cycle, tool alignment is the key and tool position is the center of the circle. If the center of the right end face of the part is the programming origin, when calibrating the X axis, the input number of the outer circle of the car is the diameter of the part behind the car plus the diameter of the circular knife. After calibrating the Z axis, the number entered after turning the end face is Z minus R{R refers to the radius of the circular cutter}. Note: Z0 cannot be entered.