Siemens SINUMERIK 840D sl Function Manual page 246

Several Operator Panels on Several NCUs, Distributed Systems (B3)
2.15 Examples
Configuration options
● Main or counterspindles are flexibly assigned to the slide.
● The speed of the main spindle and the counterspindle can be defined independently in
Minor changes in speed
Due to the unavoidable time delays incurred in the processing of actual values, abrupt
changes in speed should be avoided during cross-NCU machining operations. Compare axis
data and signals.
Configuration for NCU1
Uniform use of channel axis names in the part programs:
S4: Main spindle
S3: Counterspindle
X1: Infeed axis
Z1: Longitudinal axis
S1: Powered tool
Z3: Transfer axis
TRV: Drum V for main spindle
TRH: Drum H for counterspindle
STN: Hydraulic bar feed
Axes highlighted in bold characterize the current channel as home channel for the axis in
conjunction with axis replacement.
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each position.
Exceptions:
During the parts change from front-plane machining in drum V to rear-plane machining in
drum H, the speeds of the main spindle and the counterspindle must be synchronized
(synchronous spindle coupling).
In cases where slide 2 also participates in front-plane machining so as to "support"
slide 1, the main spindle speed also applies to slide 2. Similarly if slide 1 participates in
rear-plane machining, the counterspindle speed also applies to slide 1.
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions