B3: Distributed systems - 840D sl only
2.1 Brief description
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
77
2.1.2.6 Application example: Rotary indexing machine
On the basis of rotary cycle machine with two NCUs, the application of the "NCU Link"
function is shown as example. The principal units of the rotary indexing machine are:
● MTR rotary axis for the rotary table
● MS1 - MS4 spindles
● Machining stations 1 and 2, each with the X1 and Z1 linear axes
● Loading and unloading station
All of the machine axes remain permanently assigned to their particular NCU. The same
axes (X and Z) and spindles (S1) are always addressed in the machining program of the
relevant NCU.
The workpiece status is represented schematically after each machining step.
For each machining step, the rotary table (MTR) advances one position counter-clockwise.
This so assigns the spindles to another station for each machining step. The changing
relationships of the spindles defined in the channels to the machine axes are represented as
an axis container in the NCU.
If the machine axis of a spindle is not contained on its own NCU, the spindle setpoints are
transferred by link communication to the associated NCU and output there at the machine
axis.
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Figure 2-2 Fig. 1: Initial situation
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