HEIDENHAIN TNC 640 (34059x-02) - Manual (Page 281)

Part families—Q parameters in place of numerical values 9.2
9
TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 5/2013
281
9.2 Part families—Q parameters in place of
numerical values
Application
The Q parameter function
FN 0: ASSIGN assigns numerical values
to Q parameters. This enables you to use variables in the program
instead of fixed numerical values.
Example NC blocks
15 FN O: Q10=25 Assign
...
Q10 is assigned the value 25
25 L X +Q10 Means L X +25
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
Cylinder radius: R = Q1
Cylinder height: H = Q2
Cylinder Z1: Q1 = +30
Q2 = +10
Cylinder Z2: Q1 = +10
Q2 = +50