HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 279)

10 Programming: Q Parameters 264
Mathematical function Soft key
Arc sine
Inverse of the sine. Determine the angle
from the ratio of the opposite side to the hypotenuse.
Example: Q10 = ASIN 0.75
Arc cosine
Inverse of the cosine. Determine the angle
from the ratio of the adjacent side to the hypotenuse.
Example: Q11 = ACOS Q40
Arc tangent
Inverse of the tangent. Determine the angle
from the ratio of the opposite to the adjacent side.
Example: Q12 = ATAN Q50
Powers
Example: Q15 = 3^3
The constant PI (value = 3.14159)
Example Q15 = PI
Natural logarithm (LN) of a number
Base 2.7183
Example: Q15 = LN Q11
Logarithm of a number, base 10
Example: Q33 = LOG Q22
Exponential function, 2.7183 n
Example: Q1 = EXP Q12
Negate (multiplication by -1)
Example: Q2 = NEG Q1
Drop places after the decimal point
(form an integer)
Example: Q3 = INT Q42
Absolute value
Example: Q4 = ABS Q22
Drop places before the decimal point
(form a fraction)
Example: Q5 = FRAC Q23
Mathematical function Soft key
Check the sign of a value
(not TNC 426, TNC 430)
Example Q12 = SGN Q50
If result for Q12 = 1: Q50 >= 0
If result for Q12 = 0: Q50 < 0
Rules for formulas
Mathematical formulas are programmed according
to the following rules:
n Higher-level operations are performed first
(multiplication and division before addition and
subtraction)
N120 Q1 = 5 * 3 + 2 * 10 = 35 *
1st step: 5 * 3 = 15
2nd step: 2 * 10 = 20
3rd step: 15 + 20 = 35
N130 Q2 = SQ 10 – 3^3 = 73 *
1st step: 10 2 = 100
2nd step: 3 3 = 27
3rd step: 100 – 27 = 73
n Distributive law
for calculating with parentheses
a * (b + c) = a * b + a * c
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Mkap10.pm6 29.06.2006, 08:06 264