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Siemens SINUMERIK 840D Operating Manual

Siemens SINUMERIK 840D
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Programming technological functions (cycles)
8.4 Turning - only for G code programs
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
355
8.4 Turning - only for G code programs
8.4.1 General
In all turning cycles apart from contour turning (CYCLE95), in the combined roughing and
finishing mode, when finishing it is possible to reduce the feedrate as a percentage.
Machine manufacturer
Please also refer to the machine manufacturer's specifications.
8.4.2 Stock removal (CYCLE951)
Function
You can use the "Stock removal" cycle for longitudinal or transverse stock removal of
corners at outer or inner contours.
Note
Removing stock from corners
For this cycle, the safety clearance is additionally limited using setting data. The lower value
is taken for machining.
Please refer to the machine manufacturer's specifications.
Machining method
Roughing
In roughing applications, paraxial cuts are machined to the finishing allowance that has
been programmed. If no finishing allowance has been programmed, the workpiece is
roughed down to the final contour.
During roughing, the cycle reduces the programmed infeed depth D if necessary so that it
is possible for cuts of an equal size to be made. For example, if the overall infeed depth is
10 and you have specified an infeed depth of 3, this would result in cuts of 3, 3, 3 and 1.
The cycle would reduce the infeed depth to 2.5 to create 4 equally sized cuts.
The angle between the contour and the tool cutting edge determines whether the tool
rounds the contour at the end of each cut by the infeed depth D, in order to remove
residual corners, or is raised immediately. The angle beyond which rounding is performed
is stored in a machine data element.

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Siemens SINUMERIK 840D Specifications

General IconGeneral
SeriesSINUMERIK 840D
AxesUp to 31
ChannelsUp to 10
Operating SystemWindows-based
Power Supply24 V DC
Control Unit TypeCNC
InterfaceEthernet, PROFIBUS
DisplayTFT color display
InterpolationSpline
PLCIntegrated PLC
Data StorageCompactFlash, USB

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