Siemens SINUMERIK 840D Operator's Manual page 151

A
03.04
Global main
program/subroutine
Ground
H
Helical interpolation
HIGHSTEP
High-level CNC language
High-speed digital
inputs/outputs
I
Inch system
Inclined surface
machining
Increment
Incremental dimension
 Siemens AG, 2004. All rights reserved.
SINUMERIK 840D/840Di/810D Operator's Guide Handheld Terminal 6 (BAH) - 03.04 Edition
Every global main program/subroutine can only appear once under its
own name in the directory, and it is not possible to have the same
program name in different directories with different contents as a
global program.
Ground is taken as the total of all linked inactive parts of a device
which will not become live with a dangerous contact voltage even in
the event of a malfunction.
Helical interpolation is especially suitable for easy machining inside or
outside threads with form cutters and for milling lubrication grooves.
The helix consists of two motions:
1. A circular movement in one plane
2. A linear movement perpendicular to this plane
Summary of the programming options for the -> PLC in the
AS300/AS400 system.
The high-level language offers: -> user variable, -> pre-defined user
variable, -> system variable, -> indirect programming, -> mathematical
and trigonometric functions, -> comparison operations and logic
operations, -> program jumps and program branching, -> program
coordination (SINUMERIK 840D), -> macro technology.
The digital inputs can be used for example to start fast CNC program
routines (interrupt routines). The digital CNC outputs can be used to
trigger fast, program-controlled switching functions. (SINUMERIK
840D).
Dimension system which defines distances in inches and fractions of
inches.
Drilling and milling operations on workpiece surfaces that do not lie in
the coordinate planes of the machine can be performed easily using
the function "inclined-surface machining".
Traversed distance information via the number of increments. The
number of increments can be stored as -> setting data or selected
using keys labeled with 10, 100, 1000, 10 000.
A destination for axis traversal is defined by a distance to be covered
A
Appendix
B Terms
A-151