HEIDENHAIN TNC 320 (340 55x-05) ISO programming - Manual (Page 147)

HEIDENHAIN TNC 320 147
5.2 T
ool D
a
ta
Depending on the NC program, the machining time can increase as a
result of the tool life verification and calculation of the automatic tool
change. You can influence this with the optional input element BT
(block tolerance)
If you enter the M101 function, the TNC continues the dialog by
requesting the BT. Here you define the number of NC blocks (1 - 100)
by which the automatic tool change may be delayed. The resulting
time period by which the tool change is delayed depends on the
content of the NC blocks (e.g. feed rate, path). If you do not define BT,
the TNC uses the value 1 or, if applicable, a default value defined by
the machine manufacturer.
The more you increase the value of BT, the smaller will be
the effect of an extended program duration through M101.
Please note that this will delay the automatic tool change!
If you want to reset the current life of a tool (e.g. after
changing the indexable inserts), enter the value 0 in the
CUR_TIME
column.
The M101 function is not available for turning tools and in
turning mode.