HEIDENHAIN TNC 426, User Manual

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358 10 Programming: Q Parameters
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10.2 Part Families – Q Parameters
in Place of Numerical Values
The Q parameter function FN0: ASSIGN assigns numerical values to
Q parameters. This enables you to use variables in the program
instead of fixed numerical values.
Example NC blocks
You need write only one program for a whole family of parts, entering
the characteristic dimensions as Q parameters.
To program a particular part, you then assign the appropriate values to
the individual Q parameters.
Example
Cylinder with Q parameters
15 FNO: Q10=25 Assign
... Q10 contains the value 25
25 L X +Q10 Means L X +25
Cylinder radius R = Q1
Cylinder height H = Q2
Cylinder Z1 Q1 = +30
Q2 = +10
Cylinder Z2 Q1 = +10
Q2 = +50
Z1
Q1
Q2
Z2
Q1
Q2