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10.3 Describing Contours Through
Mathematical Functions
The Q parameters listed below enable you to program basic
mathematical functions in a part program:
To select the Q parameter function, press the Q key (at the right,
in the keypad for numerical input). The Q parameter functions are
displayed in a soft-key row.
To select the mathematical functions: Press the BASIC
ARITHMETIC soft key. The TNC then displays the following soft
keys:
Function
FN0: ASSIGN
Example: FN0: Q5 = +60
Assigns a numerical value.
FN1: ADDITION
Example: FN1: Q1 = –Q2 + –5
Calculates and assigns the sum of two values.
FN2: SUBTRACTION
Example: FN2: Q1 = +10 – +5
Calculates and assigns the difference of two values.
FN3: MULTIPLICATION
Example: FN3: Q2 = +3
+3
Calculates and assigns the product of two values.
FN4: DIVISION
Example: FN4: Q4 = +8 DIV +Q2
Calculates and assigns the product of two value
Not permitted: Division by 0
FN5: SQUARE ROOT
Example: FN5: Q20 = SQRT 4
Calculates and assigns the square root of a number.
Not permitted: square root of a negative number
At right of the „=" character you can enter the following:
Two numbers
Two Q parameters
A number and a Q parameter
The Q parameters and numerical values in the equations can be
entered with positive or negative signs.
HEIDENHAIN TNC 426 B, TNC 430
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Soft key
255
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