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G86 Boring cycle is
used for boring rough holes or holes that require additional machining
operations..
This boring
cycle is very similar to the
drilling cycle G81.
The difference is
that when using the boring cycle G86, the machine spindle stops at the bottom of
the hole.
G86 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)(final depth of tap before retract). |
|
R |
R
plane position. |
|
F |
Feedrate. |
|
K |
Number of
boring cycles (if more than one pass for boring is required). |
How G86 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 -
Machine spindle stop.
5 - Rapid positioning to.R plane (G99) or initiallevel (G98)
G98 and G99 modes.
G98 - Boring tool will go to
the initial level.
G99 - Boring tool will go to R plane.
Example of using G86 in an CNC program (G-code).
%
O0001 (G86 CNC program example)
G00 Z0.25 (Safe Z)
G00 X135 Y169 (go
to X,Y coordinates of the hole center)
S1500 M03 (Spindle
CW, n=1500)
G86 X135 Y169 Z-25 R10 F1.5
G00 Z0.25 (Safe Z)
G00 X0 Y0 (go to machine Zero)
M30 (End)
%
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CNC G-codes.G86 command -
Boring Cycle
for rough holes