HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 65)

TNC 425/TNC 415 B/TNC 407 4-6
4 Programming
4.3 Tools
Each tool is identified by a number.
The tool data, consisting of the:
• length L, and
• radius R
are assigned to the tool number.
The tool data can be entered:
• into the individual part program in a TOOL DEF block, or
• once for each tool into a common tool table that is stored as a type .T
file.
Once a tool is defined, the TNC then associates its dimensions with the
tool number, and accounts for them when executing positioning blocks.
The way the tool is used is influenced by several miscellaneous functions
(see page 12-14).
Setting the tool data
Tool numbers
Each tool is designated with a number between 0 and 254.
With TOOL CALL and TOOL DEF the tool with the number 0 is automati-
cally defined with the length L = 0 and the radius R = 0. In tool tables,
tool 0 should also be defined with L = 0 and R = 0.
Tool radius R
The radius of the tool is entered directly.
Tool length L
The compensation value for the tool length is measured
• as the difference in length between the tool and a zero tool, or
• with a tool pre-setter.
A tool pre-setter eliminates the need to define a tool in terms of the
difference between its length and that of another tool.