Siemens SINUMERIK 840D sl Function Manual page 378

Compensations (K3)
Interpolatory compensation
● Interpolation point distance ($AN_CEC_STEP[t])
● Initital position ($AN_CEC_MIN[t])
● End position ($AN_CEC_MAX[t])
where 0 ≤ k < MD18342 $MN_MM_CEC_MAX_POINTS
The following supplementary conditions apply to interpolation point k:
1. When k = MD18342 - 1
2. When k < MD18342 - 1
3. When k > MD18342 - 1
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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 (≙
interpolation point k).
The compensation value for the end position is $AN_CEC [t,k].
The compensation value of interpolation point k is used for all positions larger than the
end position (exception: table with modulo functions).
The number of required interpolation points is calculated as follows:
→ The compensation table is fully utilized!
→ The compensation table is not fully utilized; compensation values entered in the table
greater than k have no effect.
→ The compensation table is limited by a control function which reduces the end position.
Compensation values which are greater than k are ignored.
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions