Siemens SINUMERIK 802D sl Programming Manual page 185

04.07
Block search
Booting
Bus connector
C
C axis
C spline
Channel structure
Circular interpolation
Clearance control (3D),
sensor- -driven
CNC
CNC high- -level
language
© Siemens AG 2007 All rights reserved
SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) - - 04.07 Edition
The block search function allows selection of any point in the part
program at which machining must start or be continued. The
function is provided for the purpose of testing part programs or
continuing machining after an interruption.
Loading the system program after Power ON.
A bus connector is an S7--300 accessory that is supplied with the -->
I/O modules. The bus connector extends the --> S7--300 bus from
the --> CPU or an I/O module to the next adjacent I/O module.
Axis about which the tool spindle describes a controlled rotational
and positioning movement.
The C spline is the best known and the most widely used spline.
The spline passes through each of the interpolation points at a
tangent and along the axis of curvature. 3rd--degree polynomials are
used.
The channel structure makes it possible to process the --> programs
of individual channels simultaneously and asynchronously.
The --> tool is required to travel in a circle between defined points on
the contour at a specified feed while machining the workpiece.
A position offset for a specific axis can be controlled as a function of
a measured process variable (e.g. analog input, spindle current...).
This function can automatically maintain a constant clearance to
meet the technological requirements of the machining operation.
--> NC
The high--level language offers: --> user variables, --> predefined
user variables, --> system variables, --> indirect programming,
--> arithmetic and angular functions, --> relational and logic
operations, --> program jumps and branches,
--> program coordination (SINUMERIK 840D), --> macros.
Terms
B-185