Siemens SINUMERIK Series Function Manual page 248

K3: Compensations
4.4 Interpolatory compensation
Table parameters
The position-related compensation values as well as additional table parameters should be
saved for every compensation relationship in the form of system variables:
● $AN_CEC[<index>,<N>] (compensation value for interpolation point <N> of
● $AN_CEC_INPUT_AXIS[<index>] (basic axis)
● $AN_CEC_OUTPUT_AXIS[<index>] (compensation axis)
Note
In multi-channel systems the "general axis names" AX1 ... must be defined, if the names
of machine axis and channel axis are identical.
● $AN_CEC_STEP[<index>] (interpolation point distance)
● $AN_CEC_MIN[<index>] (initial position)
● $AN_CEC_MAX[<index>] (end position)
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compensation table [<t>])
<N> = interpolation point (position of the basic axis), with 0 ≤ N ≤ (value of MD18342) - 1
The particular compensation value of the compensation axis must be entered in the table
for each individual interpolation point.
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 applied.
The interpolation point distance defines the distance between the input values for the
compensation table [<t>].
The initial position is the basic 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 basic axis position at which the compensation table ends, =
interpolation point <k>.
The compensation value for the end position is $AN_CEC [<index>,<k>].
The compensation value of interpolation point <k> is used for all positions larger than the
end position (exception: table with modulo functions).
The following boundary conditions apply to interpolation point k:
– For k = MD18342 - 1:
The compensation table is fully utilized!
– For k < MD18342 - 1:
The compensation table is not fully utilized. The compensation values entered that are
greater than k are ignored.
– For k > MD18342 – 1:
The compensation table is limited by a control function which reduces the end
position. Compensation values that are greater than k are ignored.
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
Extended Functions