Siemens SINUMERIK 840D Operator's Manual page 476

A
Appendix
B Terms
B
B spline
Back up
Backlash compensation
Backup battery
Backup memory
Base axis
Basic coordinate system
Baud rate
Blank
Block
Block
Block search
A-476
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).
A copy of the memory contents stored on an external device.
Compensation of a mechanical machine backlash, e.g. backlash due
to reversal of leadscrews. The backlash compensation can be entered
separately for each axis.
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.
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.
Axis whose setpoint or actual value is employed in calculating a
compensatory value.
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.
Rate at which data transmission takes place (bit/s).
The unmachined workpiece.
All files required for programming and program execution are known
as blocks.
A section of a -> parts program terminated with a line feed.
A distinction is made between -> main blocks and -> subblocks.
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.
SINUMERIK 840D/840Di/810D Operator's Guide HMI Advanced (BAD) – 03.04 Edition
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03.04
Ó Siemens AG, 2004. All rights reserved