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Siemens SINUMERIK 840D Operator's Manual Page 339

Computerized numerical control system for machine tools.
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Retentive memory
Rigid tapping
Rotary axis
Rotary axis,
continuously turning
Rounding axis
S7 configuration
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/810D Operator's Guide HMI Embedded (BEM) – 03.04 Edition
1. Repositioning on the contour via the controls
With the Repos function it is possible to re-approach the
interruption point by means of the direction keys.
2. Repositioning on the contour via the program
Several approach strategies are available through program
commands: approaching the interruption point, approaching the
block starting point, approaching the block end point, approaching
a point on the path between the start of the block and the
interruption point.
Data areas in data blocks and times, counters and markers are
retentive (non-volatile) if their contents are not lost when the system is
restarted or the mains supply is disconnected.
This function allows threads to be tapped without a compensating
chuck. By using the method whereby the spindle, as a rotary axis, and
the drilling axis interpolate, threads can be cut to a precise final drilling
depth (e.g. for blind hole threads) (requirement: spindles in axis
Rotary axes rotate a workpiece or tool to a defined angular position.
Depending on the application, the traversing range of a rotary axis
can be selected to be limited to less than 360 degrees or to be
endlessly turning in both directions.
Endlessly-turning rotary axes are used for non-circular turning,
grinding, and winding.
Component of a -> frame which defines a rotation of the coordinate
system through a specific angle.
Rounding axes rotate a workpiece or tool to an angular position
corresponding to an indexing grid. When a grid index is reached, the
rounding axis is "in position".
S7 configuration is a tool with the aid of which modules can be
parameterized. With S7 configuration, various -> parameter blocks
of the -> CPU and the I/O modules are set on the -> programming
unit. These parameters are transmitted to the CPU.


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