Heidenhain TNC 320 (77185x-01) ISO programming User Manual Page 154

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Programming: Tools
5.2 Tool data
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TNC 320 | User's Manual for DIN/ISO Programming | 3/2014
5.2 Tool data
Requirements for tool compensation
You usually program the coordinates of path contours as they
are dimensioned in the workpiece drawing. To allow the TNC to
calculate the tool center path—i.e. the tool compensation—you
must also enter the length and radius of each tool you are using.
Tool data can be entered either directly in the part program with
G99 or separately in a tool table. In a tool table, you can also enter
additional data for the specific tool. The TNC will consider all the
data entered for the tool when executing the part program.
Tool number, tool name
Each tool is identified by a number between 0 and 32767. If you are
working with tool tables, you can also enter a tool name for each
tool. Tool names can have up to 32 characters.
The tool number 0 is automatically defined as the zero tool with the
length L=0 and the radius R=0. In tool tables, tool T0 should also
be defined with L=0 and R=0.
Tool length L
You should always enter the tool length L as an absolute value
based on the tool reference point. The entire tool length is
essential for the TNC in order to perform numerous functions
involving multi-axis machining.
Tool radius R
You can enter the tool radius R directly.
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