Siemens SINUMERIK 840D Programming Manual page 306

Appendix
A
Terms
T
Tapping with floating
tapholder
Text editor
Tool
Tool edge radius
compensation
Tool offset
Tool radius
compensation
U
User-defined variable
V
Variable definition
A-306
Tapping is carried out with or without spindle encoder (G33 or G63)
-> CYCLE840
-> Editor
A part used on the machine tool for machining. Examples of tools
include cutting tools, mills, drills, laser beams, etc.
When a contour is programmed, it is assumed that a pointed tool id
used. Since this is not always possible, the control makes allowance
for the curvature radius of the tool being used. The curvature centre
point displaced by the curvature radius is guided equidistantly to the
contour.
Turning cycles and milling cycles select and deselect tool edge radius
compensation internally.
A tool is selected through the programming of a T function (5
decades, integer) in the block. Up to nine cutting edges (D addresses)
can be assigned to each T number. The number of tools to be
managed in the control is set at the configuration stage.
In order to program a desired -> workpiece contour directly, the control
must traverse a path equidistant to the programmed contour with
allowance for the radius (G41/G42).
Users can define variables in the -> part program or data block (global
user data) for their own use. A definition contains a data type
specification and the variable name. See also -> System variable.
Cycles work internally with user-defined variables.
A variable definition includes the specification of a data type and a
variable name. The variable name can be used to address the value of
the variable.
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Cycles (PGZ) - 04.00 Edition
04.00
A
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