HEIDENHAIN TNC 320 (340 55x-05) ISO programming - Manual (Page 150)

150 Programming: Tools
5.3 T
ool compensation
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 and the spindle axis moves. To cancel length
compensation, call a tool with the length L=0.
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
TOOL CALL
+ DL
TAB
where
Caution: 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.
L: is the tool length L from the G99 block or tool table
DL
TOOL CALL
is the oversize for length DL in the T 0 block (not
taken into account by the position display).
DL
TAB
is the oversize for length DL in the tool table.