HEIDENHAIN TNC 320 User Manual page 208

5
Tools
5.3 Tool compensation
5.3 Tool compensation
Introduction
The TNC adjusts the tool path by the compensation value for
the tool length in the spindle axis. In the machining 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. TOOL CALL 0).
Danger of collision!
If you cancel a positive length compensation with
TOOL CALL 0 the distance between tool and
workpiece will be reduced.
After TOOL CALL 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 TOOL CALL block and the tool table into account:
Compensation value = L + DL
L: Tool length L from TOOL DEF block or tool table
DL : Oversize for length DL in the TOOL CALL block
TOOL CALL
DL Oversize for length DL in the tool table
:
TAB
208
+ DL
with
TOOL CALL TAB
HEIDENHAIN | TNC 320 | Conversational Programming User's Manual | 9/2016