Interpolatory Compensation; General - Siemens SINUMERIK 802D sl Function Manual

11.3

Interpolatory compensation

11.3.1

General

Terminology
Compensation value: The difference between the axis position measured by the position
actual-value encoder and the required programmed axis position (= axis position of the ideal
machine). The compensation value is often also referred to as the correction value.
Interpolation point: A position of the axis and the corresponding offset value.
Offset table: Table containing interpolation points
Compensation table
Because dimensional deviations between the leadscrew pitch and the measuring system
directly affect the accuracy of workpiece machining, they must be compensated for by the
relevant position-dependent compensation values. The compensation values are derived
from measured error curves and entered in the control in the form of compensation tables
during installation. A separate table must be created for each compensation relation.
The compensation values and additional table parameters are entered in the compensation
tables using special system variables.
Entry of compensation table
Compensation tables can be loaded to the backed up NC user memory by two different
methods.
● The compensation values are loaded when an NC program with the compensation tables
● The compensation values can also be loaded by transferring the tables from a PC via the
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
is started.
serial interface on the HMI.
Note
The compensation tables can be output via the serial interface on the HMI from operating
area "System" -> "Data I/O" -> " Data selection" / Data ... / Compensation: Leadscrew
error and loaded back following editing.
Compensation (K3)
11.3 Interpolatory compensation
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