HEIDENHAIN TNC 360 ISO Programming - Manual (Page 69)

4-5 TNC 360
4 Programming
4.2 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 G99 block, or
• once for each tool into a common tool table that is stored as
program 0.
Once a tool is defined, the TNC then associates its dimensions with the
tool number and accounts for them when executing positioning blocks.
Determining tool data
Tool number
Each tool is designated with a number between 0 and 254.
The tool with the number 0 is defined as having length L = 0 and radius
R = 0. In tool tables, T0 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.