Siemens Sinumerik 840D sl Programming Manual

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Contents

Motion commands3.1 The coordinate systemISO Milling44 Programming Manual, 06/09, 6FC5398-7BP10-1BA0● By specifying G17 (or G18, G19) G68 X... Y... R... ; " the commands specified in thefollowing blocks are rotated by the angle specified with R around the point (X, Y). Theangle of rotation can be specified in units of 0.001 degree.;<&HQWHURIURWDWLRQ5$QJOHRIURWDWLRQ ಯಯPHDQVURWDWLRQLQFRXQWHUFORFNZLVHGLUHFWLRQLVWREHVSHFLILHGDVDEVROXWHYDOXH5;<Figure 3-6 Rotation of a coordinate system● The deselection of the coordinate system rotation takes place through G69.● G68 is executed in the plane that was selected through G68. The 4th and 5th axes mustbe linear axes.G17: X-Y planeG18: Z-X planeG19: Y-Z planeAdditions to the commands for rotating the coordinate systems● To rotate a coordinate system, MD28081 $MC_MM_NUM_BASE_FRAMES must be setto a value of >= 3.● If "X" and "Y" are omitted, the current position is used as the rotation center for thecoordinate rotation.● The positional data for the rotation of a coordinate system are specified in the rotatedcoordinate system.● If you program a change of plane (G17 to G19) after a rotation, the angles of rotationprogrammed for the axes are retained and continue to apply in the new working plane. Itis therefore advisable to deactivate the rotation before a change of plane.