Siemens SINUMERIK 840Di sl - Page 457

A
01/2008 Appendix
B Terms
A
© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition A-457
Programmable frames
Programmable → frames can be used to dynamically define new
coordinate system starting points while the part program is running. A
distinction is made between absolute definition using a new frame and
additive definition with reference to an existing starting point.
CNC programming
language
The CNC programming language is based on DIN 66025 with high-
level language expansions. The → CNC high-level language and
programming support the definition of macros (sequenced
statements), for example.
R
Reference point
Point on the machine tool used to reference the measuring system of
the → machine axes.
Reference point
approach
If the utilized distance measuring system is not an absolute value
encoder then it is necessary to perform a reference point approach to
ensure that the actual values returned by the measuring system match
the machine coordinate values.
REPOS
1. Reapproach contour, triggered by operator
REPOS allows the tool to be returned to the interrupt position by
means of the direction keys.
2. Programmed contour reapproach
A selection of approach strategies are available in the form of
program commands: Approach point of interruption, approach start
of block, approach end of block, approach a point on the path
between start of block and interruption.
Blank
Workpiece as it is before the part is machined.
Rotation
Component of a → frame, which defines a rotation of the coordinate
system through a specific angle.
R parameters
Arithmetic parameters can be set or requested by the programmer of
the → part program for any purpose in that program.
Rotary axis
Rotary axes apply a workpiece or tool rotation to a defined angular
position.
Rotary axis, turning
continuously
Depending on the application, the travel range of a rotary axis can be
limited to less than 360 degrees or the axis can be continuously
turned in both directions. Continuously turning rotary axes are used,
for example, for eccentric machining, grinding and winding.
S
Block
A section of a → part program terminated with a line feed. A