Programming Of Indexing Axes - Siemens SINUMERIK 840D sl Function Manual

T1: Indexing axes

16.4 Programming of indexing axes

16.4 Programming of indexing axes
16.4
Coded position
To allow indexing axes to be positioned from the NC part program, special instructions are
provided with which the indexing numbers (e.g. location numbers) are programmed instead
of axis positions in mm or degrees. The availability of a special instruction depends on the
axis type (linear or rotary axis):
Statement
CAC(i)
CACP(i)
CACN(i)
CDC(i)
CIC(i)
i:
Value range of i:
Examples
Programming
POS[B]=CAC(20)
Programming
POS[B]=CACP(10)
Programming
POS[B]=CACN(10)
Programming
POS[B]=CDC(50)
948
Effect
Traverse coded position in absolute terms
Traverse coded position ain absolute terms in
the positive direction
Traverse coded position ain absolute terms in
the negative direction
Traverse coded position along the direct
(shortest) path
Traverse coded position incrementally
Coded position (indexing position)
0 ... 59; whole number (positive and negative values are possible in CIC)
Comment
; Indexing axis B approaches the coded position
(indexing) 20 in absolute mode. The direction of
traversing depends on the current actual position.
Comment
; Indexing axis B approaches the coded position (index
position ) 10 in absolute mode with positive direction
of rotation (possible only for rotary axes).
Comment
; Indexing axis B approaches the coded position (index
position ) 10 in absolute mode with negative direction
of rotation (possible only for rotary axes).
Comment
; Indexing axis B approaches indexing position 50
directly along the shortest path (possible only for
rotary axes).
Availability
Linear axis, rotary axis
Rotary axis
Rotary axis
Rotary axis
Linear axis, rotary axis
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions