Siemens SINUMERIK 840D sl Function Manual page 346

K3: Compensation
5.2 Temperature compensation
The error curve for a given temperature T can generally be represented with sufficient
accuracy by a straight line with a temperature dependent gradient and reference position.
Compensation equation
The compensation value ∆K
axis and temperature T according to the following equation:
ΔK
x
The meaning is as follows:
ΔK
K :
0
P :
x
P
0
tanβ
Figure 5-1
346
= 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 the position-dependent temperature compensation (corresponds
to the 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, 09/2009, 6FC5397-1BP20-0BA0
of this
x
Extended Functions