Commissioning; Machine Data For Indexing Axes - Siemens SINUMERIK 840D Function Manual

T1: Indexing axes

8.3 Commissioning

8.3 Commissioning
8.3.1

Machine data for indexing axes

Indexing axis
An axis is defined as indexing axis by assigning an indexing position table to this axis, using the
following axis-specific machine data:
MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB = <value>
<Value> Meaning
First indexing position for indexing axes with equidistant positions
For an indexing axis with equidistant positions, the absolute position of the first indexing
position is set using the following axes-specific machine data:
MD30503 $MA_INDEX_AX_OFFSET
Indexing position tables
In the indexing position tables, the indexing positions are saved in mm, inches or degrees.
Presently, two indexing position tables are available.
MD10910 $MN_INDEX_AX_POS_TAB_1 [ <n> ] (indexing position table 1)
MD10930 $MN_INDEX_AX_POS_TAB_2 [ <n> ] (indexing position table 2)
with <n> = 0 ... (maximum number - 1)
Multiple table assignment
Several axes can be assigned to an indexing position table.
Requirement: the axes are of the same type (linear axis, rotary axis, modulo 360° function)
General supplementary conditions
● The indexing positions must be listed in the indexing position table without gaps in an
ascending order.
● Indexing positions that follow one another must not be identical.
● The indexing positions must be specified in the basic coordinate system.
242
1 The axis is assigned indexing position table 1.
2 The axis is assigned indexing position table 2.
3 Equidistant indexing intervals (Page 245)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA