B3: Distributed systems - 840D sl only
2.3 Examples
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
127
● Distributed on the circumference of a drum B (rear-plane machining) the machine has:
– 4 counterspindles GS1 to GS4
– 4 cross slides
– Each slide has two axes.
– Optionally a powered tool S5-S8 can operate on each slide.
– The position of each counterspindle can be offset through a linear axis for example for
transferring parts from the main spindle for rear-plane machining in drum B. (Transfer
axes. Axes: ZG1 - ZG4).
● Couplings:
– If drum A rotates, all main spindles of this drum are subordinate to another group of
slides.
– If drum B rotates, all main counterspindles and all transfer axes of this drum are
subordinate to another group of slides.
– The rotations of drums A and B are autonomous.
– The rotations of drums A and B are limited to 270 degrees.
(range and twisting of supply cables)
Term: Position
Main spindle HS
i
and counterspindle GS
i
together with their slides characterize a position.
NCU assignment
The axes and spindles of a position (for this example) are each assigned to an NCU. One of
the NCUs, the master NCU, controls the axes for the rotations of drums A and B additionally.
There are 4 NCUs with a maximum of the following axes:
Number of axes
Per NCU
i
the following axes/spindles must be configured:
Slide 1: X
i
1, Z
i
1
2: X
i
2, Z
i
2
Spindles: HS
i
, GS
i
, powered tools: S1, S2
Transfer axis: ZG
i
Bar feed: STN
i
.
For the master NCU, in addition to the above-mentioned axes there are the two axes for
rotating drums A and B. The list shows that it would not be possible to configure the axis
number for a total of 4 positions via an NCU. (Limit 31 axes, required are 4 + 10 + 2 axes).
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