Siemens SINUMERIK 840Di sl - Page 462

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Appendix 01/2008
B Terms
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© Siemens AG 2008 All rights reserved.
A-462 SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
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Workpiece
Part to be made/machined by the machine tool.
Workpiece coordinate
system
The starting position of the workpiece coordinate system is the
→ workpiece zero. In machining operations programmed in the
workpiece coordinate system, the dimensions and directions refer to
this system.
Workpiece zero
The workpiece zero is the starting point for the → workpiece
coordinate system. It is defined by the distance from the machine
zero.
Tool
A part used on the machine tool for machining. Examples include
turning tools, milling cutters, drills, laser beams, etc.
Tool offset
By programming a T function (5 decades, integer) in the block, you
can select the tool. Every T number can be assigned up to nine
cutting edges (D addresses). The number of tools to be managed in
the control is set at the configuration stage.
Tool radius
compensation
In order to program a desired → workpiece contour directly, the
control must traverse a path equidistant to the programmed contour,
taking into account the radius of the tool used. (G41/G42).
Z
Inch measuring system
Measuring system, which defines distances in inches and fractions of
inches.
Access authorizations
The CNC program blocks and data are protected by a 7-level system
of access restrictions:
• Three password levels for system manufacturers, machine
manufacturers and users and
• Four keylock switch settings, which can be evaluated via the PLC.
Cycle support
The available cycles are listed in the "Cycle support" menu in the
"Program" operating area. Once the desired machining cycle has
been selected, the parameters required for assigning values are
displayed in plain text.
Cycle
Protected subprogram for executing a repeated machining operation
on the → workpiece
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