Tool Data; Tool Number, Tool Name; Tool Length L - HEIDENHAIN TNC 620 User Manual

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4.1

Tool data

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.
Permitted characters: # $ % & , - _ . 0 1 2 3 4 5 6 7 8 9 @
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
The control automatically replaces lowercase letters with
corresponding uppercase letters during saving.
Impermissible characters: <blank space> ! " ' ( ) * + : ; < =
> ? [ / ] ^ ` { | } ~
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

Always enter the tool length L as an absolute value based on the tool
reference point.
The absolute tool length is essential for the control in
order to perform numerous functions (e.g., material
removal simulation or Dynamic Collision Monitoring
(DCM)).
The absolute length of the touch probe is always
referenced to the tool reference point. The machine
tool builder usually defines the spindle nose as the tool
reference point.
Measuring the tool length
You can measure your tools in the machine (e.g., with a tool touch
probe) or externally with a tool presetter. If such measurements are
not possible, you can determine the tool length.
You have the following options for determining the tool length:
With a gauge block
With a calibration pin (inspection tool)
Before you determine tool length, you have to set the
preset in the spindle axis.
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HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
Tools | Tool data