Siemens SINUMERIK 840Di - Indexing Axes

06.03
10.5 Axes and spindles
10-329
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
10.5.12 Indexing axes
Indexing axis are rotary or linear axes that may only be traversed within their
traversing range to defined positions, the indexing positions.
Traversing to indexing positions using the parts program or manually is only
effective if the corresponding machine axis has been successfully referenced.
The indexing positions are stored in tables.
The machine data
 MD 30500: INDEX_AX_ASSIGN_POS_TAB[n] (axis is indexing axis)
assigns the machine axis the relevant table of indexing positions and also
defines the machine axis as an indexing axis.
The indexing positions are stored in one of 2 possible tables.
 MD10900: INDEX_AX_LENGTH_POS_TAB_1 (number of positions of in-
dexing table 1)
 MD10910: INDEX_AX_POS_TAB_1[n] (indexing position table 1)
 MD10920: INDEX_AX_LENGTH_POS_TAB_2 (number of positions of in-
dexing table 2)
 MD10930: INDEX_AX_POS_TAB_2[n] (indexing position table 2)
Table 10-31 Indexing axes: Machine data
Number Identifier Name Ref.
General ($MN_ ...)
10260 CONVERT_SCALING_SYSTEM Basic system switch active G2
10270 POS_TAB_SCALING_SYSTEM Unit system of position tables
10900 INDEX_AX_LENGTH_POS_TAB_1 Number of indexing positions used in Table 1
10910 INDEX_AX_POS_TAB_1[n] Indexing position table 1
10920 INDEX_AX_LENGTH_POS_TAB_2 Number of indexing positions used in Table 2
10930 INDEX_AX_POS_TAB_2[n] Indexing position table 2
Axis/spindle-specific ($MA_ ...)
30300 IS_ROT_AX Rotary axis R2
30310 ROT_IS_MODULO Modulo conversion for rotary axis R2
30320 DISPLAY_IS_MODULO
Position display “Modulo 360°”
R2
30500 INDEX_AX_ASSIGN_POS_TAB Axis is indexing axis
30501 INDEX_AX_NUMERATOR Counter for indexing axes with equidistant positions
Indexing axis
Indexing position
tables
Machine data
10 NC Start-U
p
with HMI Advanced