Terms - Siemens SINUMERIK 802D sl Programming Manual

Terms

A
A spline
Absolute dimension
AC control
(Adaptive Control)
Acceleration with jerk
limitation
Access rights
© Siemens AG 2007 All rights reserved
SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) - - 04.07 Edition
Important terms are listed below in alphabetical order, accompanied
by explanations. Cross--references to other entries in this glossary
are indicated by the symbol "-->".
The A spline runs tangentially through the programmed interpolation
points (3rd degree polynomial).
A destination for an axis movement is defined by a dimension that
refers to the origin of the currently active coordinate system. See
also --> incremental dimension.
A process variable (e.g. path--specific or axial feedrate) can be
controlled as a function of another, measured process variable (e.g.
spindle current). Typical application: To maintain a constant chip
removal volume during grinding.
In order to obtain the optimum acceleration gradient for the machine
while providing effective protection for the mechanical components,
the machining program offers a choice between instantaneous
acceleration and continuous (smooth) acceleration.
The CNC program blocks and data are protected by a 7--level
system of access restrictions:
• Three password levels for system manufacturers, machine
manufacturers and users and
• Four keyswitch settings which can be evaluated via the PLC.
B
B-181