Operator`s manual

Advanced Haas Mill Programming Techniques Training Manual Page 43
Incremental G68
Incremental G68 with sub routines may be used to program parts with repeating tool paths which rotate
around some central point. To use incremental G68 Setting #73 G68 INCREMENTAL ANGLE must be turned
to ON in Haas machines.
Below five ¾ in wide closed slots are located around the center of the part. A carbide 5/8 inch end mill is
used to ramp down at 2° back and forth, finishes the bottom, and radiuses on and off to finish the .200
depth and the ¾ in width of the slots. The five slots are equally spaced 72° apart. The center of the part is
designated the part zero.
Key to the program is the incremental use of G68. Note the use of the following incremental command:
G91 G68 X0 Y0 R72. This command will incrementally rotate the tool path 72° counter clockwise to get the
tool path of the closed slot in the upper right hand quadrant. By calling it up repeatedly using M98 Pxxxx L4
all the slots may be simply programmed.