A
Appendix 03.04
B Terms
Ó Siemens AG, 2004. All rights reserved
A-476 SINUMERIK 840D/840Di/810D Operator’s Guide HMI Advanced (BAD) – 03.04 Edition
B
B spline
The programmed positions for the B spline are not interpolation
points, but merely "check points". The curve generated does not pass
directly through these check points, but only in their vicinity (1st, 2nd
or 3rd degree polynomial).
Back up
A copy of the memory contents stored on an external device.
Backlash compensation
Compensation of a mechanical machine backlash, e.g. backlash due
to reversal of leadscrews. The backlash compensation can be entered
separately for each axis.
Backup battery
The backup battery provides non-volatile storage for the -> user
program in the -> CPU and ensures that defined data areas and flags,
timers and counters are retentive.
Backup memory
The backup memory guarantees the backup of memory areas of the
-> CPU without backup battery. A programmable number of timers,
counters, flags and data bytes can be backed up.
Base axis
Axis whose setpoint or actual value is employed in calculating a
compensatory value.
Basic coordinate system
Cartesian coordinate system, is mapped onto machine coordinate
system by means of transformation.
In the -> parts program, the programmer uses the axis names of the
basic coordinate system. The basic coordinate system exists in
parallel to the -> machine coordinate system when no ->
transformation is active. The difference between the systems relates
only to the axis identifiers.
Baud rate
Rate at which data transmission takes place (bit/s).
Blank
The unmachined workpiece.
Block
All files required for programming and program execution are known
as blocks.
Block
A section of a -> parts program terminated with a line feed.
A distinction is made between -> main blocks and -> subblocks.
Block search
The block search function allows selection of any point in the parts
program at which machining must start or be continued. The function
is provided for the purpose of testing parts programs or continuing
machining after an interruption.
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