Siemens sinumerik 840D sl Function Manual page 257

Starting value
The first motion command in the definition of a curve table defines the starting value for the
leading and following value.
All instructions that cause a preprocessing stop must be removed.
Example 1
Without tool radius compensation, without memory type
N100 CTABDEF(AX2, AX1, 3,0)
N110 AX1=0 AX2=0
N110 AX1=20 AX2=0
N120 AX1=100 AX2=6
N130 AX1=150 AX2=6
N130 AX1=180 AX2=0
N200 CTABEND
Example 2
Example of a curve table with active tool radius compensation:
Prior to definition of a curve table with CTABDEF(), tool radius compensation must not be
active; otherwise alarm 10942 is generated. This means that tool radius compensation must
be activated within the definition of the curve table. Similarly, it must be deactivated again
before the end of the curve table definition, using CTABEND.
N10 CTABDEF(Y, X, 1, 0)
N20 X0 Y0
N30 G41 X10 Y0
N40 X20 Y20
N50 X40 Y0
N60 X60 Y20
N70 X80 Y0
N80 G40 X90 Y0
N90 CTABEND
Tool radius compensation is activated in block N30; this causes the approach movement for
radius compensation to be made in this block. Similarly, the approach movement for
deactivation of the radius compensation is made in block N80.
Special functions: Axis Couplings and ESR (M3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
; Beginning of the definition of non-
; periodic curve table No. 3
; 1. Motion instruction specifies the start value
; master value: 0, Following value: 0
; 1. Curve segment: Master value: 0...20, Following value:
Starting value ...0
; 2. Curve segment: Master value: 20...100, following value:
0...6
; 3. Curve segment: Master value: 100...150, following value 6
; 4. Curve segment: Master value: 150...180, following value:
6...0
; End of definition, curve table
; is generated in internal representation. Preprocessing
reorganizes to state at
; the beginning of N100
; Beginning of the definition of non-
; periodic curve table No. 1
; WZR compensation on
; WZR compensation off
Detailed description
2.2 Curve tables
37