Siemens SINUMERIK 840D sl Function Manual page 354

Compensations (K3)
Temperature compensation
Figure 5-1
Compensation equation
The compensation value ∆K
axis and temperature T according to the following equation:
ΔK
x
Key to letters (see diagram below):
ΔK
K
0
P
x
P
0
tanβ
The compensation values are acquired in interpolation cycles. If the compensation value ∆K
is positive, the axis moves in the negative direction.
Figure 5-2
354
Example of an error curve for heat expansion
= K (T) + tanβ (T) * (P
0
Temperature compensation value of axis at position P
x
Position-independent temperature compensation value of axis
Actual position of axis
Reference position of axis
Coefficient for position-dependent temperature compensation
(corresponds to gradient of the approximated error line)
Approximated error line for temperature compensation
is calculated on the basis of current actual position P
x
- P )
x 0
x
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
of this
x
x
Extended Functions