Siemens SINUMERIK 802D sl Function Manual page 215

Figure 11-4
Depending on the requirement, several compensation relations can be defined for one axis.
The total compensation value results from the sum of all the compensation values of this
axis.
Note
You can read the compensation value that is currently effective on the user interface under
the "Sag/temperature" variable. To do this, select softkey "System" followed by "Service
Display" → "Service Axes".
Setting options
The many ways in which the compensation value for sag compensation can be
produced/influenced are listed below (see diagram below).
1. An axis can be defined as the input variable (base axis) for several compensation tables
2. An axis can be defined as the recipient of the output variable (compensation axis) of
3. An axis can be both a base axis and a compensation axis at any one time. The
4. The scope of action of the compensation (starting and end position of the base axis) and
5. Compensation can be direction-dependent (settable via system variables).
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Example of sag caused by own weight
(settable via system variables).
several compensation tables (settable via system variable). The total compensation value
is derived from the sum of the individual compensation values.
The following definition applies for the maximum number of possible compensation
tables:
Total maximum number of tables available for all axes: 2
programmed (required) position setpoint is always used to calculate the compensation
values.
the distance between the interpolation points can be defined for every compensation
table (settable via system variables).
Compensation (K3)
11.3 Interpolatory compensation
215