HEIDENHAIN TNC 620 (73498x-01) ISO programming - Manual (Page 210)

210 Programming: Q parameters
8.1 Pr
inciple and o
v
erview
8.1 Principle and overview
You can program entire families of parts in a single part program. You
do this by entering variables called Q parameters instead of fixed
numerical values.
Q parameters can represent information such as:
„ Coordinate values
„ Feed rates
„ Spindle speeds
„ Cycle data
Q parameters also enable you to program contours that are defined
with mathematical functions. You can also use Q parameters to make
the execution of machining steps depend on logical conditions.
Q parameters are designated by letters and a number between 0 and
1999. Parameters that take effect in different manners are available.
Please refer to the following table:
Q4
Q2
Q3 Q1
Q5
Q6
Meaning Range
Freely applicable parameters, as long as no
overlapping with SL cycles can occur, globally
effective for all programs stored in the TNC
memory Q0 to Q99
Parameters for special TNC functions. Q100 to Q199
Parameters that are primarily used for cycles,
globally effective for all programs stored in the
TNC memory Q200 to Q1199
Parameters that are primarily used for OEM
cycles, and are globally effective for all
programs stored in the TNC memory. This may
require coordination with the machine
manufacturer or supplier Q1200 to Q1399
Parameters that are primarily used for call-
active OEM cycles, globally effective for all
programs that are stored in the TNC memory Q1400 to Q1499
Parameters that are primarily used for Def-
active OEM cycles, globally effective for all
programs that are stored in the TNC memory Q1500 to Q1599
Freely applicable parameters, globally effective
for all programs stored in the TNC memory Q1600 to Q1999
Freely usable QL parameters, only effective
locally (within a program) QL0 to QL499
Freely usable QR parameters that are
nonvolatile, i.e. they remain in effect even after
a power interruption QR0 to QR499