Siemens SINUMERIK 840Di sl Programming Manual page 540

Glossary
NURBS
Internal motion control and path interpolation are performed using NURBS (non-uniform
rational B-splines). This provides a uniform internal method for all interpolations in the control
(SINUMERIK 840D).
OEM
For machine manufacturers who manufacture their own user interface or wish to integrate
their own technology-specific functions in the control, free space has been left for individual
solutions (OEM applications) for SINUMERIK 840D.
Offset memory
Data range in the control in which the tool offset data are stored.
Operating mode
An operating concept on a SINUMERIK control. The operating modes -> Jog, -> MDA and ->
Automatic are defined.
Oriented spindle stop
Stops the workpiece spindle with a specified orientation angle, e.g. to perform an additional
machining operation at a specific position.
Oriented tool retraction
RETTOOL: If machining is interrupted (because of tool breakage, for example), a program
command can be used retract the tool with a defined orientation by a defined path.
Overall reset
In the event of an overall reset, the following memories of the → CPU are deleted:
• -→ RAM
• Read/write area of → load memory
• → System memory
• → Backup memory
Override
Manual or programmable control feature which enables the user to override programmed
feedrates or speeds in order to adapt them to a specific workpiece or material.
Part program block
Part of a → part program that is demarcated by a line feed. There are two types: → main
blocks and → subblocks.
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Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals