Siemens sinumerik 840d Programming Manual page 317

08.97
9
840D 840D
NCU 571 NCU 572
NCU 573
Programming example 1
Definition of a curve table
N100 CTABDEF(Y,X,3,0)
N110 X0 Y0
N120 X20 Y0
N130 X100 Y6
N140 X150 Y6
N150 X180 Y0
N200 CTABEND
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SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
9.3 Curve tables, CTABDEF, CTABEND, CTAB, CTABINV
810D 840Di
Path Traversing Behavior
Y
6
5
4
3
2
1
5 20 100
Beginning of the definition of a non-
periodic curve table with number 3
1. Traverse statement defines starting
values and 1st intermediate point:
Leading value: 5; Following value: 0
2. Intermediate point: Leading value:
0...20; Following value:
Starting value...0
3. Intermediate point: Leading value:
20...100;
Following value: 0...6
4. Intermediate point: Leading value:
100...150;
Following value: 6...6
5. Intermediate point: Leading value:
150...180;
Following value: 6...0
End of the definition; The curve table is
generated in its internal representation as a
polynomial up to the 3rd order; The
calculation of the curve definition depends
on the modally selected interpolation type
(circle, linear, spline interpolation); The part
program state before the beginning of the
definition is restored.
9
X
150 180
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