Siemens SINUMERIK 802D sl Function Manual page 211

Effectiveness
● The compensation values are stored in the NC user memory and active (after POWER
● The function has been activated for the relevant machine axis
● The axis has been referenced (IS "Referenced/synchronized 1" V390x 0000.4 set).
As soon as these conditions have been fulfilled, the axis-specific actual value is altered by
the compensation value in all modes and traversed by the machine axis immediately.
If the reference is then lost, e.g. because the encoder frequency has been exceeded (IS
"Referenced/synchronized 1" =0), compensation processing is de-activated.
Compensation table
The position-related compensation values are stored in the form of system variables for the
relevant axis in the compensation table. 350 interpolation points (N = 0...349) are possible.
Note
The max. possible interpolation points are entered in the axis-specific machine data
MD38000 MM_ENC_ENC_COMP_MAX_POINTS[0] .
The following measuring-system-specific parameters must be set for the table (see Fig.
"Compensation table parameters (system variables for LEC)"):
● Compensation value for interpolation point N in compensation table:
● Distance between interpolation points: $AA_ENC_COMP_STEP[0,AXi]= ...
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
ON).
(MD32700 ENC_COMP_ENABLE [0] = 1).
$AA_ENC_COMP [0,N,AXi]= ...
where: AXi = machine axis name, e.g. X1, Y1, Z1; N = interpolation point index
For every individual interpolation point (axis position) the compensation value must be
entered in the table. The magnitude of the compensation value is not limited.
Note
The first and last compensation values remain active over the entire traversing range;
i.e. these values should be set to "0" if the compensation table does not cover the entire
traversing range.
The distance between interpolation points defines the distance between the
compensation values in the relevant compensation table (see above for AXi).
Compensation (K3)
11.3 Interpolatory compensation
211