HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 154)

7 Programming: Miscellaneous functions 138
7.5 Miscellaneous F
unctions f
o
r
Rotary A
x
e
s
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° 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.
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 reset M128 with M129.
To cancel M128, enter M129. The TNC also resets M128 if you
select a new program in a program run operating mode.
The machine geometry must be entered in machine
parameters 7510 ff. by the machine tool builder.
Example NC block
Moving at 1000 mm/min to compensate a radius.
L X+0 Y+38.5 RL F125 M128 F1000
Hkap7.pm6 29.06.2006, 08:06 138