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To perform drilling
operations, a drilling cycle G81 is used.
G84 X... Y... Z...
R... F... K...
| X |
Coordinate
X of the hole center. |
|
Y |
Coordinate
Y of the hole center. |
|
Z |
Drilling depth (from R-plane to Z position). |
|
R |
R
plane position. |
|
F |
Feedrate. |
|
K |
Number of
drilling cycles (if more than one cycle is required). |
How G81 Drilling Cycle
works.
1 - Fast movement to X,Y coordinates of the hole center.
2
- Fast movement to R plane.
3 - Drilling operation (Z-depth).
4 -
Fast movement to R plane or Initial level.
G98 and G99 modes.
G98 - Drill will go to
the initial level.
G99 - Drill will go to R plane.
Example of using G81 in an CNC program (G-code).
%
O0001 (G81
example) (Program number (O0001) and Program name (G81
example)
G00 Z0.5 (Safe Z)
G00 X16 Y23 (go
to X,Y coordinates of the hole center)
G81 X16 Y23 Z-12 R5.2 F50 (Z-drilling
depth)
G00 Z0.5 (Safe Z)
G00 X0 Y0 (go to machine Zero)
M30 (End)
%
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CNC G-codes.G81 command -
Drilling Cycle