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Tool Data - Siemens SINUMERIK 840D Operator's Manual

Computerized numerical control system for machine tools.
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Tool data

5.1.1 Tool offset structure
Tool wear
Tool offset with
D numbers only
Tool cutting edges
5.1.2 Tool types and tool parameters
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/810D Operator's Guide HMI Embedded (BEM) – 03.04 Edition
A tool is selected in the program with the T function. Numbers T0 to
T32000 can be assigned to tools. Each tool can have up to 9 cutting
edges: D1 - D9. D1 to D9 activates the tool offset of a cutting edge for
the active tool.
The tool length compensation is applied with the first traversing
motion (linear or polynomial interpolation) of the axis.
A tool radius compensation is activated by programming G41/42 in
the active plane (G17, 18, 19) and in a program block with G0 or G1.
Allowances for changes in the active tool shape can be made in the
tool length (tool parameters 12-14) and tool radius (tool parameters
Tool management is implemented outside the NCK. T numbers are
irrelevant. This function is activated via the MD.
The D number range increases to 1 - 32000. A D number can be
assigned only once for each tool, i.e. each D number represents
precisely one tool offset data record.
Each tool can have up to 9 cutting edges:
T No.
Number of the tool
D No.
Number of the cutting edge
Every data field (offset memory) that can be called with a D number
contains not only the geometric information for the tool but also
additional entries, i.e. the tool type (drill, milling cutter, turning tools
with cutting edge position etc.).
Parameters Operating Area
5.1 Tool data


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