HEIDENHAIN TNC 640, User Manual, Page: 621 / 948

Multiple-Axis Machining | Miscellaneous functions for rotary axes
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
621
M128 on tilting tables
If you program a tilting table movement while
M128
is active, the
control rotates the coordinate system accordingly. For example,
if you rotate the C axis by 90 (through a positioning command
or datum shift) and then program a movement in the X axis, the
control executes the movement in the machine Y axis.
The control also transforms the preset, which has been shifted by
the movement of the rotary table.
M128 with 3-D tool compensation
If you carry out a three-dimensional tool compensation while
M128
and an
RL
/
RR
/ radius compensation are active, the control will
position the rotary axes automatically with particular machine
geometries (Peripheral Milling).
Further information: "Three-dimensional tool compensation
(option 9)", page 631
Effect
M128
becomes effective at the start of the block,
M129
at the end
of the 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 control will also cancel
M128
if
you select a new program in a program run operating mode.
Example: Feed rate of 1000 mm/min for compensation
movements
L X+0 Y+38.5 IB-15 RL F125 M128 F1000