HEIDENHAIN iTNC 530 (34049x-08) ISO programming - Manual (Page 170)

170 Programming: Tools
5.2 T
ool data
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, DR2>0). If you
are programming the machining data with an allowance, enter the
oversize value in the T block of the part program.
A negative delta value describes a tool undersize (DL, DR, DR2<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.
Entering tool data into the program
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
Example
DR<0
DR>0
DL<0
R
DL>0
L
R
Delta values from the tool table influence the graphical
representation of the tool. The representation of the
workpiece
remains the same in the simulation.
Delta values from the T block change the represented size
of the workpiece during the simulation. The simulated
tool size
remains the same.
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.
If the tool table TOOL.T is active, use a G99 block to
preselect the tool. The machine tool manual provides
further information.
N40 G99 T5 L+10 R+5 *