HEIDENHAIN iTNC 530 (340 49x-05) ISO programming - Manual (Page 402)

402 Programming: Multiple Axis Machining
12.4 Miscellaneous F
unctions f
o
r Rotary Ax
es
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 G41/G42, the TNC will automatically position the
rotary axes for certain machine geometrical configurations .
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.
N50 G01 G41 X+0 Y+38.5 IB-15 F125 M128 F1000 *