Hirth Axis - Siemens SINUMERIK 840D sl Function Manual

T1: Indexing axes
16.5 Equidistant index intervals
16.5.2

Hirth axis

Function
For a "Hirth axis", using a special gearing (Hirth gearing) the rotary axis is interlocked when
reaching an indexing position. In this case, a locking bolt or a gearwheel is engaged using a
linear axis. In order that the mechanical system of the machine is not damaged, the interlock
can only be engaged at an indexing position. For a Hirth axis, all of the indexing positions must
have the same the distance between one another (equidistant indexing positions).
Preconditions
● The "Hirth axis" must be a rotary axis.
● The "Hirth axis" must be an indexing axis. See Chapter "Commissioning (Page 818)"
● The active measuring system of the indexing axis must be synchronized or referenced:
DB31, ... DBX60.4/.5 == 1 (referenced/synchronized, encoder 1/2)
References: Function Manual Basic Functions; reference point approach (R1)
Commissioning
Machine data
● MD30300 $MA_IS_ROT_AX = 1 (rotary axis)
● MD30505 $MA_HIRTH_IS_ACTIVE[ <axis> ] = 1 (indexing axis with Hirth gearing)
● MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB[ <axis> ] = 3 (indexing axis with
equidistant indexing positions)
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Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions