HEIDENHAIN iTNC 530 525
12.6 Miscellaneous Functions for Rotary Axes
M128 on tilting tables
If you program a tilting table movement while M128 is active, the TNC
rotates the coordinate system accordingly. If, for example, you rotate
the C axis by 90° (through a positioning command or datum shift) and
then program a movement in the X axis, the TNC executes the
movement in the machine axis Y.
The TNC also transforms the defined datum, which has been shifted
by the movement of the rotary table.
M128 with 3-D tool compensation
If you carry out a 3-D tool compensation with active M128 and active
radius compensation RL/RR, the TNC will automatically position the
rotary axes for certain machine geometrical configurations
(Peripheral-Milling, see "Three-dimensional tool compensation
(software option 2)", page 529).
Effect
M128 becomes effective at the start of block, M129 at the end of block.
M128 is also effective in the manual operating modes and remains
active even after a change of mode. The feed rate for the
compensation movement will be effective until you program a new
feed rate or until you cancel M128 with M129.
Enter M129 to cancel M128. The TNC also cancels M128 if you select a
new program in a program run operating mode.
Example NC blocks
Feed rate of 1000 mm/min for compensation movements:
L X+0 Y+38.5 IB-15 RL F125 M128 F1000
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