Fadal L93NN Bolt Hole Circle (BHC)
Fadal L93NN subroutine is used for pattern drilling in a circle usually called Bolt Hole Circle.
N5 L93NN R0... R1... R2...
|R0||Direction and distance in X-axis from starting position to center of circle.|
|R1||Direction and distance in Y-axis from starting position to center of circle.|
|R2||Angular step between holes.|
Positive angular step will move CCW around the bolt circle.
Negative angular step will move CW around the bolt circle.
|NN||Number of holes to be drilled. E.g. L9302 will drill 2 holes.|
Fadal Bolt Hole Circle Example Program
N1 O1 N2 G0 G90 S2000 M3 X0 Y0 N3 H1 M7 Z.1 N4 G81 G99 R0+.1 Z-1.0 F10. N5 L9308 R0+0 R1-1.5 R2-45. N6 M5 M9 N7 G80