Siemens SINUMERIK 840D sl Function Manual page 362

Compensations (K3)
5.4 Interpolatory compensation
i.e.
t = 0: 1. compensation table t = 1: 2. compensation table etc.
Table parameters
The position-related corrections for the relevant compensation relationship are stored as
system variables in the compensation table.
The following parameters must be set for the table:
● Compensation value for interpolation point N of compensation table [t]
● Base axis ($AN_CEC_INPUT_AXIS[t])
● Compensation axis ($AN_CEC_OUTPUT_AXIS[t])
Note
In multi-channel systems the "general axis identifiers" AX1... must be preset, if the
identifiers of machine axis and channel axis are identical.
● Interpolation point distance ($AN_CEC_STEP[t])
● Initital position ($AN_CEC_MIN[t])
● End position ($AN_CEC_MAX[t])
(≙ interpolation point k).
The compensation value for the end position is $AN_CEC [t,k].
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($AN_CEC [t, N])
The compensation value of the compensation axis must be entered in the table for each
individual interpolation point (position of the base axis).
Interpolation point N is limited by the number of possible interpolation points in the
relevant compensation table:
MD18342 $MN_MM_CEC_MAX_POINTS.
Permissible range of N: 0 ≤ N < MD18342
Name of machine axis whose setpoint is to be used as the input for the compensation
table [t].
Name of machine axis to which the output of the compensation table [t] is to be applied.
The interpolation point distance defines the distance between the input values for the
compensation table [t].
The initial position is the base axis position at which the compensation table [t] begins
(≙ interpolation point 0).
The compensation value for the initial position is $AN_CEC [t,0 ].
The compensation value of interpolation point 0 is used for all positions smaller than the
initial position (exception: table with modulo functions).
The end position is the base axis position at which the compensation table [t] ends
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions