HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 200)

7-15 TNC 425/TNC 415 B/TNC 407
7 Programming with Q Parameters
Arc sine:
Inverse of the sine; Determine the angle from the
ratio of the opposite side to the hypotenuse
e.g. Q10 = ASIN 0.75
Arc cosine:
Inverse of the cosine; Determine the angle from
the ratio of the adjacent side to the hypotenuse
e.g. Q11 = ACOS Q
Arc tangent:
Inverse of the tangent; Determine the angle from
the ratio of the opposite to the adjacent side
e.g. Q12 = ATAN Q11
Powers
e.g. Q15 = 3^3
π
(3.14159)
Natural logarithm (LN) of a number,
base 2.7183
e.g. Q15 = LN Q11
Logarithm of a number; base 10
e.g. Q33 = LOG 022
Exponential function (2.7183 to the power of n)
e.g. Q1 = EXP Q12
Negation (multiplication by –1)
e.g. Q2 = NEG Q1
Dropping of trailing zeros (making an integer)
e.g. Q3 = INT Q42
Absolute value
e.g. Q4 = ABS Q22
Dropping the values before the decimal point;
fractions
e.g. Q5 = FRAC Q23
7.7 Entering Formulas Directly