HEIDENHAIN iTNC 530 (60642x-04) - Manual (Page 540)

540 Programming: Multiple Axis Machining
12.7 Cont
our mo
v
e
ments – Spline int
e
rp
olation (sof
tw
ar
e option
2) Example: Block format for five axes
The TNC executes the spline block according to the following third-
degree polynomials:
X(t) = K3X · t
3 + K2X · t 2 + K1X · t + X
Y(t) = K3Y · t 3 + K2Y · t 2 + K1Y · t + Y
Z(t) = K3Z · t 3 + K2Z · t 2 + K1Z · t + Z
A(t) = K3A · t 3 + K2A · t 2 + K1A · t + A
B(t) = K3B · t 3 + K2B · t 2 + K1B · t + B
whereby the variable t runs from 1 to 0. The incrementation of t
depends on the feed rate and the length of the spline.
7 L X+33.909 X-25.838 Z+75.107 A+17 B-10.103 FMAX Spline starting point
8 SPL X+39.824 Y-28.378 Z+77.425 A+17.32 B-12.75
K3X+0.0983 K2X-0.441 K1X-5.5724
K3Y-0.0422 K2Y+0.1893 1Y+2.3929
K3Z+0.0015 K2Z-0.9549 K1Z+3.0875
K3A+0.1283 K2A-0.141 K1A-0.5724
K3B+0.0083 K2B-0.413 E+2 K1B-1.5724 E+1 F10000
Spline end point
Spline parameters for X axis
Spline parameters for Y axis
Spline parameters for Z axis
Spline parameters for A axis
Spline parameters for B axis with exponential
notation
9 ...