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G85 Boring Cycle can
use for boring and reaming operations.
This cycle (G85) is
used to improve the surface quality of the hole, its dimensional tolerances and
/ or its geometric parameters (roundness, concentricity, etc.).
G85 X... Y... Z...
R... F... K...
| X |
X
coordinate of the hole center. |
|
Y |
Y
coordinate of the hole center. |
|
Z |
Depth (from R-plane to Z-depth). |
|
R |
R
plane position. |
|
F |
Feedrate. |
|
K |
Number of
boring cycles (if more than one pass is required). |
How G85 Boring Cycle
works.
1 - Rapid
positioning to X,Y coordinates of the hole center.
2
- Rapid positioning to R plane.
3 - Boring operation (Z-depth).
4 -
Tool is retracted with the specified feed..
5 - Tool is moved to initial-level (G98).
G98 and G99 modes.
G98 - Tool will go to
the initial level.
G99 - Tool will go to R plane.
Example of using G85 in an CNC program (G-code).
%
O0001 (G85
example) (Program number (O0161) and Program name (G85
example)
G00 Z0.15 (Safe Z)
G00 X48 Y53 (go
to X,Y coordinates of the hole center)
S1200 M03 (Spindle
CW, n=1200)
G85 X48 Y56 Z-14 R5 F1.75 (Z-final
depth of tool before retract)
G00 Z0.15 (Safe Z)
G00 X0 Y0 (go to machine Zero)
M30 (End)
%
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CNC G-codes.G85 command -
Boring Cycle