HEIDENHAIN TNC 640 (34059x-01) ISO programming - Manual (Page 222)

222 Programming: Q Parameters
8.1 Pr
inciple and Ov
erview
Calling Q-parameter functions
When you are writing a part program, press the "Q" key (in the numeric
keypad for numerical input and axis selection, below the +/– key). The
TNC then displays the following soft keys:
Function group Soft key Page
Basic arithmetic (assign, add,
subtract, multiply, divide, square root) Page 224
Trigonometric functions Page 226
If/then conditions, jumps Page 228
Other functions Page 231
Entering formulas directly Page 260
Function for machining complex
contours See User’s
Manual for
Cycles
The TNC shows the soft keys Q, QL and QR when you are
defining or assigning a Q parameter. First press one of
these soft keys to select the desired type of parameter,
and then enter the parameter number.
If you have a USB keyboard connected, you can press the
Q key to open the dialog for entering a formula.