
3.MANUAL OPERATION B-63783EN-1/01
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Tool holder offset
The length unique to the machine tool from the rotation center of a
rotary axis (A and B axes, A and C axes, B and C axes) around which
the tool axis rotates to the tool mounting position is called the "tool
holder offset." This tool holder offset can be set in parameter No. 7548
in addition to the tool length offset.
Tool length offset
Tool holder off set
When bit 6 (DTH) of parameter No. 7540 is set to 1, a tool holder offset
added to the tool tip coordinate can be displayed.
Parameter-based rotation axis rotation angle setting
The component of each axis in three-dimensional handle feed/interrupt
is found from the machine coordinates on the rotation axis that are used
to control the direction of the tool axis. In some machine
configurations, however, the tool axis is inclined using a fixed
attachment. In such a case, the rotation angle of the rotation axis can be
set by parameter setting. By setting bit 1 (RAP) of parameter No. 1014,
the value set in parameter No. 7516 can be used as the rotation angle of
the rotation axis.
Rotation axis reference position compensation and rotation axis offset
- Rotation axis reference position compensation
A slight displacement of the rotation axis reference position due to
thermal displacement, for example, can be compensated for using
parameter No. 7518. Three-dimensional handle feed calculation is
performed using the rotation angle incorporating a parameter-set
reference position compensation value for the rotation axis rotation
angle.
- Rotation axis offset
For compensation, an offset for the rotation axis rotation angle is set in
parameter No. 7517. Three-dimensional handle feed calculation is
performed using the rotation angle incorporating a parameter-set offset
for the rotation axis rotation angle.
Rotation axis rotation angle = (rotation axis angle in the machine
coordinate system) - [parameter No. 7517 + parameter No. 7518]