HEIDENHAIN TNC 426 (280 476) - Manual (Page 224)

HEIDENHAIN TNC 426, TNC 430 197
7.
5 Miscellaneous F
unctions f
or Rotary Ax
es
Compensating the machine’s kinematic
configuration for ACTUAL/NOMINAL positions
at end of block: M144
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.
Behavior with M144
The TNC calculates into the position value any changes in the
machine’s kinematic configuration which result, for example, from
adding a spindle attachment. If the position of a controlled tilted axis
changes, the position of the tool tip to the workpiece is also changed.
The resulting offset is calculated in the position display.
Effect
M144 becomes effective at the start of the block. M144 does not
function in connection with M114, M128 or a tilted working plane.
You can cancel M144 by programming M145.
Positioning blocks with M91/M92 are permitted if M144 is
active.
The position display in the operating modes FULL
SEQUENCE and SINGLE BLOCK does not change until the
tilting axes have reached their final position.
The machine geometry must be entered in machine
parameters 7502 and following by the machine tool
builder. The machine tool builder determines the behavior
in the automatic and manual operating modes. Refer to
your machine manual.