Siemens SINUMERIK 840D sl Function Manual page 358

Compensations (K3)
Temperature compensation
Figure 5-3
Specify parameters
The temperature compensation parameters must now be set on the basis of the
measurement results (see diagram above).
Reference position P
As the diagram above illustrates, there are basically two methods of configuring reference
position P
1. P
2. P
In our example, variant 2 is chosen, where the position-independent temperature
compensation value is always 0. The temperature compensation value therefore only
consists of the position-dependent component.
The following parameters result:
● MD32750 $MA_TEMP_COMP_TYPE = 2
● P
Coefficient tanβ (T)
In order to determine the dependency of coefficient tanβ of the position-dependent
temperature compensation on the temperature, the error curve gradient is plotted against the
measured temperature:
358
Error curves determined for the Z axis
0
:
0
= 0 with position-independent temperature compensation value K
0
≠ 0 with position-independent temperature compensation value K
0
(only position-dependent temperature compensation active)
= 320 mm → SD43920 $SA_TEMP_COMP_REF_POSITION = 320
0
(reference position for position-dependent temperature compensation)
_ 0
0
≠ 0
0
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions