HEIDENHAIN TNC 620 (81760x-02) ISO programming - Manual (Page 194)

Programming: Tools
5.3 Tool compensation
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TNC 620 | User's ManualDIN/ISO Programming | 2/2015
5.3 Tool compensation
Introduction
The TNC adjusts the spindle path in the spindle axis by the
compensation value for the tool length. In the working plane, it
compensates the tool radius.
If you are writing the part program directly on the TNC, the tool
radius compensation is effective only in the working plane.
The TNC accounts for the compensation value in up to five axes
including the rotary axes.
Tool length compensation
Length compensation becomes effective automatically as soon as
a tool is called. To cancel length compensation, call a tool with the
length L=0 (e.g.
T 0).
Danger of collision!
If you cancel a positive length compensation with T
0 the distance between tool and workpiece will be
reduced.
After
T the path of the tool in the spindle axis, as
entered in the part program, is adjusted by the
difference between the length of the previous tool
and that of the new one.
For tool length compensation, the control takes the delta values
from both the
T block and the tool table into account.
Compensation value = L + DL
T block
+ DL
TAB
with
L: Tool length L from G99 block or tool table
DL
T block
: Oversize for length DL in the T block
DL
TAB
: Oversize for length DL in the tool table