Interpolatory Compensation; General Properties - Siemens SINUMERIK 840D sl Function Manual

5.4

Interpolatory compensation

5.4
5.4.1

General properties

Function
The "Interpolatory compensation" function allows position-related dimensional deviations (for
example, leadscrew and measuring system errors, sag and angularity errors) to be
corrected.
The compensation values are measured during commissioning and stored in a table as a
position-related value. During operation, the corresponding axis is compensated between
interpolation points during linear interpolation.
Methods
Within "interpolatory compensation", a distinction is made between the two following
compensation methods:
● Compensation of leadscrew errors and measuring system errors
● Compensation of sag and angularity errors
Many of the characteristics of these two compensation methods are identical and are
therefore subsequently described for the two methods.
Terminology
Important terms for "interpolatory compensation" are:
● Compensation value
● Basic axis
● Compensation axis
● Interpolation point
● Compensation table
● Compensation relation
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
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.
Axis whose setpoint position or actual position forms the basis for calculating a
compensation value.
Axis whose setpoint position or actual position is modified by a compensation value.
A position of the base axis and the corresponding compensation value of the
compensation axis.
Table of interpolation points and compensation values (see below)
Assignment of the base axis and the corresponding compensation axis and the reference
to the corresponding compensation table.
K3: Compensation
5.4 Interpolatory compensation
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