153
G Codes
96-8000 rev R June 2007
Programming example to probe the center of a part:
O1234 (G136)
M53
G04 P100
M63
G00 G90 G54 X0 Y5.
Z-17.
G91 G01 Z-1. F20.
G31 Y-1. F10. M75
G01 Y1. F20.
G00 Z2.
Y-10.
G01 Z-2. F20.
G136 Y1. F10.
G01 Y-1.
M53
G04 P100
M63
G00 G90 G53 Z0
M30
G141 3D+ Cutter Compensation (Group 07)
X X-axis command
Y Y-axis command
Z Z-axis command
A A-axis command (optional)
B B-axis command (optional)
D Cutter Size Selection (modal)
I Size of first cutting depth
J Amount to reduce cutting depth each pass
K Minimum depth of cut
F Feed rate in G93 or G94 (modal in G94)
This feature performs three-dimensional cutter compensation.
The form is:
G141 Xnnn Ynnn Znnn Innn Jnnn Knnn Fnnn Dnnn
Subsequent lines can be:
G01 Xnnn Ynnn Znnn Innn Jnnn Knnn Fnnn
Or
G00 Xnnn Ynnn Znnn Innn Jnnn Knnn
Some CAM systems are able to output the X, Y, and Z with values for I, J, K. The I, J, and K values tell the control
the direction in which to apply the compensation at the machine.
The I, J, and K specify the normal direction relative to the center of the tool to the contact point of the tool in the
CAM system. The I, J, and K vectors are required by the control to be able to shift the tool path in the correct
direction. The value of the compensation can be in a positive or negative direction.
The offset amount entered in radius or diameter (Setting 40) for the tool will compensate the path by this amount
even if the tool motions are 2 or 3 axes.
Only G00 and G01 can use G141. D-code selects which offset to use. G93 feed command is required on each
block.
With a unit vector, I
2
+ J
2
+ K
2
must equal 1.
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