HEIDENHAIN TNC 406 - Manual (Page 207)

186 10 Programming: Q Parameters
1
0.1 Pr
inciple and Ov
erview
10.1 Principle and Overview
You can program an entire family 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
„
Electrode data
„ Cycle data
Q parameters are designated by the letter Q and a number between
0 and 255.
Q parameters also enable you to program contours that are defined
through mathematical functions.In addition, you can use Q
parameters to make execution of machining steps depend on certain
logical conditions. You can mix
Q parameters and fixed numerical values within a program.
Automatic deletion of Q parameters
The TNC deletes Q parameters (and the status display) when user
parameter 7300 = 1 and the miscellaneous functions M00, M02 or
M30 or the END block are executed in a program.
Some Q parameters are always assigned the same data by
the TNC. For example, Q108 is always assigned the
current electrode radius (see ”Preassigned Q parameters”
on page 202).
Q4
Q2
Q3 Q1
Q5
Q6