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6.4 CIRCULAR INTERPOLATION BY PROGRAMMING THE CENTER OF THE ARC IN ABSOLUTE COORDINATES (G06) By adding function G06 to a circular interpolation block you can program the coordinates of the center of the arc (I,J, or K) in absolute coordinates i.e. with respect to the zero origin and not to the beginning of the arc. The center coordinates will be programmed in radius or diameter depending on the programming units selected by axis-machine parameter “DFORMAT”. Function G06 is not modal, so it should be programmed any time the coordinates of the center of the arc are required in absolute coordinates. G06 can be programmed as G6. Example with X axis programmed in radius: X 90 40 Z 60 110 160 Various programming modes are analyzed below, point X40 Z60 being the starting point. Cartesian coordinates: G90 G06 G03 X90 Z110 I90 K60 G06 X40 Z160 I90 K160 Polar coordinates: G90 G06 G03 Q0 I90 KG0 G06 Q-90 I90 K160 Chapter: 6 PATH CONTROL Section: CENTERABSOLUTE COORDINATES (G06) Page 9
