Siemens SINUMERIK 840D sl Function Manual page 819

Additional secondary conditions for modulo rotary axes
● Permissible range: 0° ≤ indexing position < 360°
● If the indexing axis is at the last indexing position in the indexing position table, when
traversing to the next indexing position in the positive direction of rotation, the first indexing
position is approached.
● If the indexing axis is at the first indexing position in the indexing position table, when
traversing to the next indexing position in the negative direction of rotation, the last indexing
position is approached.
No. of indexing positions
A maximum of 60 indexing positions can be entered in an indexing position table. The actual
number of indexing positions that is used or the programmable number is defined using
machine data:
MD10900 $MN_INDEX_AX_LENGTH_POS_TAB_1 (number of indexing positions of indexing
position table 1)
MD10920 $MN_INDEX_AX_LENGTH_POS_TAB_2 (number of indexing positions of indexing
position table 2)
Note
Entries in the indexing positions table that exceed the parameterized number of indexing
positions are not considered.
System of units for indexing positions
The system of units of indexing positions is defined on an NC-specific basis:
MD10270 $MN_POS_TAB_SCALING_SYSTEM = <value>
<Value> System of units
Note
The machine data is only evaluated if the following applies: MD10260
$MN_CONVERT_SCALING_SYSTEM == 1
Displaying the actual indexing position
When traversing indexing axes, the machine data is used to define at which actual position
the display of the actual indexing position changes in the system variable
$AA_ACT_INDEX_AX_POS_NO:
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
0 Metric
1 inch
T1: Indexing axes
16.3 Commissioning
819