
B-63944EN/02 PROGRAMMING 21.5-AXIS MACHINING FUNCTION
- 669 -
- Notes on performing circular interpolation and helical interpolation when using
the workpiece coordinate system as the programming coordinate system
• The start point, end point, and center of an arc change as the
table rotation axis rotates.
•
I, J, K commands the vector of the block start point to the center
of the arc from the start point in the rotary axis position.
• Note the following:
<1> Only a table rotation axis normal to a selected plane can be
rotated during circular interpolation.
<2> During circular interpolation, those table rotation axes not
normal to a selected plane must continue to be at the same
position as when tool center point control is started.
If <1> or <2> is not satisfied, the alarm PS5421 is issued.
No restriction is imposed on rotation on a tool rotation axis.
- Program examples
• In the case of a mixed type machine
Descriptions are based on the following machine configuration.
C-axis
Center of C-axis rotation
Z-axis
Y-a xi s
X-axis
B-axis
Center of B-axis rotation
Tool center point
Workpiece
coordinate system