
14. TOOL COMPENSATION FUNCTION
B–63522EN/02
NC FUNCTION
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(4) A–axis and B–axis, with the tool axis on the
Z–axis, and the B–axis used as the master
(5) A–axis and B–axis, with the tool axis on the
Z–axis, and the A–axis used as the master
B
A
Z
Y
X
B
A
B
A
Z
X
Y
A
B
Workpiece Workpiece
A tool compensation vector is found from the coordinates on the rotation
axes for controlling the tool axis direction. However, the configuration
of some machines is such that the tool axis is inclined using a fixed
attachment. In such a case, the rotation angles of the rotation axes can be
set using parameters.
The machine–specific length from the rotation center of the tool rotation
axes (A– and B–axes, A– and C–axes, and B– and C–axes) to the tool
mounting position is referred to as the tool holder offset. Unlike a tool
length offset value, a tool holder offset value is set in parameter No. 7648.
When tool axis direction tool length compensation is applied, the sum of
the tool holder offset and tool length offset is handled as a tool length for
compensation calculation.
Tool holder offset
Tool length offset
Rotation center
Tool
length
This function compensates for a slight shift of the rotation axis origin
caused, for example, by thermal displacement. .
Set offsets relative to the rotation angles of the rotation axes in parameter.
D Parameter–based
rotation angle
specification
D Tool holder offset
D Rotation axis origin
compensation and
rotation axis offset