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G84 tapping cycle can
create threads.
Thread cutting in the hole is carried out by rotating the
machine spindle clockwise.
Then, upon reaching the required depth of the thread
in the hole, the spindle starts to rotate in the opposite direction to remove
the tool.
G84 X... Y... Z...
R... P... 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. |
|
P |
Dwell time. |
|
F |
Feedrate. |
|
K |
Number of threading cycles (if more than one pass is required). |
How G84 Tapping Cycle
works.
1 - Rapid
positioning to X,Y coordinates of the hole center.
2
- Rapid positioning to R plane.
3 - Tapping operation (Z-depth).
4 -
Dwell for time specified with parameter P.Spindle is rotated counterclock-wise.
5 - Tap is retracted with the specified feed.
6 - Tap is moved to initial-level (G98).
G98 and G99 modes.
G98 - Tap will go to
the initial level.
G99 - Tap will go to R plane.
Example of using G84 in an CNC program (G-code).
%
O0001 (G84
example) (Program number (O0001) and Program name (G84
example)
G00 Z0.5 (Safe Z)
G00 X-80 Y70 (go
to X,Y coordinates of the hole center)
S1000 M03 (Spindle
CW, n=1000)
G84 X-80 Y70 Z-25 R10 F1.5 (Z-final
depth of tap before retract)
G00 Z0.5 (Safe Z)
G00 X0 Y0 (go to machine Zero)
M30 (End
Program)
%
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CNC G-codes.G84 command -
Tapping Cycle