Glossary
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
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Polar coordinates
A coordinate system which defines the position of a point on a plane in terms of its distance
from the origin and the angle formed by the radius vector with a defined axis.
Polynomial interpolation
Polynomial interpolation enables a wide variety of curve characteristics to be generated,
such as straight line, parabolic, exponential functions (SINUMERIK 840D sl).
Positioning axis
Axis that performs an auxiliary motion on a machine tool (e.g. tool magazine, pallet
transport). Positioning axes are axes that do not interpolate with → path axes.
Position-time cams
The term "position-time cam" refers to a pair of software cams that can supply a pulse of a
certain duration at a defined axis position.
Pre-coincidence
Block change occurs already when the path distance approaches an amount equal to a
specifiable delta of the end position.
Program block
Program blocks contain the main program and subprograms of → part programs.
Program level
A part program started in the channel runs as a → main program on program level 0 (main
program level). Any part program called up in the main program runs as a → subprogram on
a program level 1 ... n of its own.
Programmable frames
Programmable → frames enable dynamic definition of new coordinate system output points
while the part program is being executed. A distinction is made between absolute definition
using a new frame and additive definition with reference to an existing starting point.
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