HEIDENHAIN TNC 320 (340 551-01) - Manual (Page 109)

HEIDENHAIN TNC 320 109
5.3 T
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5.3 Tool Compensation
Introduction
The TNC adjusts the spindle path in the tool 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 and the tool axis moves. To cancel length compensation,
call a tool with the length L=0.
For tool length compensation, the TNC takes the delta values from
both the TOOL CALL block and the tool table into account:
Compensation value = L + DL
TOOL CALL
+ DL
TAB
where
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 tool 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.
L: is the tool length L from the TOOL DEF block or tool
table.
DL
TOOL CALL
is the oversize for length DL in the TOOL CALL block
(not taken into account by the position display).
DL
TAB
is the oversize for length DL in the tool table.