Siemens SINUMERIK 840C - Manual (Page 778)

06.93 12 Functional Descriptions
12.1.2 Functional description
Because compensation is not possible at the reference point, the error curve must be shifted
so that the error is zero at the reference point.
Error=0
Traverse
path
Pos.
error
Spacing
Reference point
Neg.
error
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SINUMERIK 840C (IA)