10.1 Principle And Overview Of Functions - HEIDENHAIN TNC 640 User Manual

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10.1 Principle and overview of functions

With Q parameters you can program entire families of parts in a
single NC program by programming variable Q parameters instead
of fixed numerical values.
Use Q parameters for e.g.:
Coordinate values
Feed rates
Spindle speeds
Cycle data
With Q parameters you can also:
Program contours that are defined through mathematical
functions
Make execution of machining steps depend on certain logical
conditions
Q parameters are always identified with letters and numbers. The
letters determine the type of Q parameter and the numbers the
Q parameter range.
For more information, see the table below:
Q parameter
type
Q parameters:
QL parameters:
QR parameters:
370
Programming Q Parameters | Principle and overview of functions
Q parameter range
0 – 99
100 – 199
200 – 1199
1200 – 1399
1400 – 1599
1600 – 1999
0 – 499
0 to 99
100 to 199
200 to 499
Meaning
Parameters affect all NC programs in the control's memory
Parameters for the user, if there are no overlaps with the
HEIDENHAIN-SL cycles
Parameters for special functions on the control that can be read
by NC programs of the user or by cycles
Parameters primarily used for HEIDENHAIN cycles
Parameters that are primarily used with manufacturer cycles when
values are given back to the user program
Parameters primarily used as input parameters for manufacturer
cycles
Parameters for users
Parameters only effective locally within an NC program
Parameters for users
Parameters permanently (remanence) affect all NC programs
in the control's memory, even after a power interruption
Parameters for users
Parameters for HEIDENHAIN functions (e.g., cycles)
Parameters for the machine tool builder (e.g., cycles)
HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017