HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 189)

TNC 425/TNC 415 B/TNC 407 7-4
7 Programming with Q Parameters
Fig. 7.2: Part dimensions as Q parameters
Q
Q2
Q2
Q1
Q1
Z1
Z2
ENT
e.g.
5
ENT
e.g.
6
7.1 Part Families – Q Parameters Instead of Numerical Values
The Q parameter function FN0: ASSIGN is for assigning numerical values
to Q parameters.
Example: Q10 = 25
This enables you to enter variable Q parameters in the program instead of
fixed numerical values.
Example: L X + Q10 (= L X + 25)
You write one program for a whole family of parts,
entering the characteristic dimensions as Q param-
eters. To program a specific part you then need
only assign the fitting 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
To assign numerical values to Q parameters:
Select “basic arithmetic”.
Open a new block with function FN0.
PARAMETER NUMBER FOR RESULT ?
Enter the Q parameter number.
FIRST VALUE / PARAMETER ?
Enter a value or another Q parameter whose value should be assigned
to Q5.
Resulting NC block: FN0: Q5 = 6
The value to the right of the equal sign is assigned to the Q parameter to
its left.