HEIDENHAIN iTNC 530 (340 49x-04) ISO programming - Manual (Page 289)

HEIDENHAIN iTNC 530 289
7.
5 Miscellaneous F
unctions f
o
r Rotary Ax
es
Maintaining the position of the tool tip when
positioning with tilted axes (TCPM): M128
(software option 2)
Standard behavior
The TNC moves the tool to the positions given in the part program. If
the position of a tilted axis changes in the program, the resulting offset
in the linear axes must be calculated and traversed in a positioning
block (see figure for M114).
Behavior with M128 (TCPM: Tool Center Point Management)
If the position of a controlled tilted axis changes in the program, the
position of the tool tip to the workpiece remains the same.
If you wish to use the handwheel to change the position of the tilted
axis during program run, use M128 in conjunction with M118.
Handwheel positioning in a fixed machine coordinate system is
possible when M128 is active.
X
Z
B
Z
X
The machine manufacturer must enter the machine
geometry in kinematic tables.
For tilted axes with Hirth coupling: Do not change the
position of the tilted axis until after retracting the tool.
Otherwise you might damage the contour when
disengaging from the coupling.