Fadal L93NN BHC Subroutine – Accurate Bolt Hole Circle Drilling
Fadal L93NN Bolt Hole Circle (BHC)
Fadal L93NN subroutine is used for pattern drilling in a circle usually called Bolt Hole Circle.
Programming
N5 L93NN R0... R1... R2...
Parameters
| Parameter | Description |
|---|---|
| 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. |
Programming Example
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
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