Link Axes - Siemens SINUMERIK 840D sl Function Manual

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B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
When advancing the rotary table with RVM or the drum with MS, the axis holding the
workpiece moves to the next machining unit.
The axis holding the workpiece is now assigned to the channel of the machining unit. This is
on another NCU in the example, but this is not necessarily the case.
As the above diagram shows, machine axis MS1, which is physically controlled by NCU1, is
brought into position/station2 through rotation of the drum/rotary table. To ensure that a
coordinated machining operation between the slide and spindle can now take place in
position/station2, the commands for spindle MS1 are transferred in this position by means of
link communication. Spindles MS1, MS2, ... are link axes.
Physical axes can only be subordinate to the motion control of one NCU channel at any one
time. However, the motion control initiative for an axis can be assigned to different NCU
channels in succession.
Solutions
The Link Axis property has been introduced so as to make a physical axis available to
several different NCUs. In the diagram above, MS1 becomes the link axis from the point of
view of NCU2 (bottom diagram) after it has been turned to position/station2.
The configuration concept axis container is available for variable assignments of channel
axes to machine axes according to axis group.
All link axes which are moved to the next position/station by a particular drum/rotary table
must be managed in the same axis container.
2.1.4.3

Link axes

Link axes
● Definition:
● The software option "Link axis" must be installed.
Coordination
● The alternate use of a physical axis by several NCUs is dependent on all the relevant
Interpolation
● Local axes and link axes can be interpolated together through motion control by means of
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
A link axis is an axis whose drive control and position control are subordinate to another
NCU or which is the local axis of the NCU concerned, but which can be addressed by
another NCU.
NCUs being aware of the status and data of the particular axis and on their ability to
coordinate use of the axis.
one NCU.
2.1 Brief description
101

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