Siemens SINUMERIK Series - Page 237

K3: Compensations
4.4 Interpolatory compensation
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
237
Note
Compensation tables can only be loaded if the corresponding compensation function is
not active:
• MD32700 $MA_ENC_COMP_ENABLE (interpolatory compensation) = 0
• MD32710 $MA_CEC_ENABLE (enable sag compensation) = 0
These compensation values are not lost when the control is switched off because they are
stored in the static user memory. They can be updated if necessary (e.g. following re-
measuring because of machine aging).
Note
When changing machine data:
• MD18342 $MN_MM_CEC_MAX_POINTS
• MD38000 $MA_MM_ENC_COMP_MAX_POINTS
is formatted during the next system run-up of the static user memory (see Section "S7:
Memory
configuration (Page 755)").
Linear interpolation between interpolation points
The traversing path to be compensated delineated by the start and end positions is divided
up into several (number depends on error curve shape) path segments of equal size (see
diagram below). The actual positions that limit these sub-paths are referred to as
"interpolation points" below. A compensation value must be entered for each interpolation
point (actual position) during commissioning. The compensation value applied between two
interpolation points is generated on the basis of linear interpolation using the compensation
values for the adjacent interpolation points (i.e. adjacent interpolation points are linked along
a line).
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Figure 4-4 Linear interpolation between the interpolation points