Siemens SINUMERIK 840D sl Function Manual page 375

The following example explains in more detail how sag and angularity compensation can be
implemented by a grid of 4 x 5 (lines x columns) in size. The size of the whole grid is
2000 x 900 mm
the X axis and 300 mm along the Y axis.
Note
The following interdependencies apply for the maximum dimension of the grid (number of
lines and columns):
• The number of lines depends on the number of axes in the system (dependent on the
• The number of columns is dependent on the maximum number of values which can be
The number of lines and columns is set via the following machine data:
MD18342 $_MN_MM_CEC_MAX_POINTS (maximum number of interpolation points for
sag compensation)
This machine data is memory-configuring!
Figure 5-9
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
. The compensation values are each measured in steps of 500 mm along
2
NCU type).
entered in a compensation table (up to a total of 2000 values).
CAUTION
Compensation values of Z axis with chessboard-like distribution of X-Y plane
K3: Compensation
5.4 Interpolatory compensation
375