HEIDENHAIN TNC 620 User Manual page 199

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
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 program
The machine tool builder determines the scope of
function of the G99 function. Refer to your machine
manual.
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*
HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
tool during the simulation.
Tool data 5.2
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