Siemens SINUMERIK 840Di sl Operating Manual page 457

A
01/2008
Programmable frames
CNC programming
language
R
Reference point
Reference point
approach
REPOS
Blank
Rotation
R parameters
Rotary axis
Rotary axis, turning
continuously
S
Block
© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
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.
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.
Point on the machine tool used to reference the measuring system of
the → machine axes.
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.
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.
Workpiece as it is before the part is machined.
Component of a → frame, which defines a rotation of the coordinate
system through a specific angle.
Arithmetic parameters can be set or requested by the programmer of
the → part program for any purpose in that program.
Rotary axes apply a workpiece or tool rotation to a defined angular
position.
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.
A section of a → part program terminated with a line feed. A
A
Appendix
B Terms
A-457