Tools | Tool data
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HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
207
Delta values for lengths and radii
Delta values are offsets in the length and radius of a tool.
A positive delta value describes a tool oversize (DL, DR>0). If you
are programming the machining data with an allowance, enter the
oversize value in the T.
A negative delta value describes a tool undersize (DL, DR<0). An
undersize is entered in the tool table for wear.
Delta values are usually entered as numerical values. In a T block,
you can also assign the values to Q parameters.
Input range: You can enter a delta value with up to ± 99.999 mm.
Delta values from the tool table influence the graphical
representation of the clearing simulation.
Delta values from the T block do not change the
represented size of the tool during the simulation.
However, the programmed delta values move the tool
by the defined value in the simulation.
Delta values from the T block influence the position
display depending on the optional machine parameter
progToolCallDL (no. 124501).
Entering tool data into the NC program
Refer to your machine manual.
The machine tool builder determines the scope of
functions of the G99 function.
The number, length and radius of a specific tool is defined in the
G99 block of the part program:
Select the tool definition: Press the TOOL DEF key
Tool number: Each tool is uniquely identified by
its tool number
Tool length: Compensation value for the tool
length
Tool radius: Compensation value for the tool
radius
In the programming dialog, you can transfer the value
for tool length and tool radius directly into the input line
by pressing the desired axis soft key.
Example
N40 G99 T5 L+10 R+5*
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