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B-181

SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition

Terms

Important terms are listed below in alphabetical order, accompanied

by explanations. Cross--references to other entries in this glossary

are indicated by the symbol ”-->”.

A spline The A spline runs tangentially through the programmed interpolation

points (3rd degree polynomial).

Absolute dimension 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.

AC control

(Adaptive Control)

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). T ypical application: To maintain a constant chip

removal volume during grinding.

Acceleration with jerk

limitation

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.

Access rights 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.

Siemens SINUMERIK 802D sl Programming Manual

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