HEIDENHAIN iTNC 530 (340 49x-05) - Manual (Page 176)

176 Programming: Tools
5.2 T
ool D
a
ta
Automatic tool change if the tool life expires: M101
The TNC automatically changes the tool if the tool life TIME1 expires
during program run. To use this miscellaneous function, activate M101
at the beginning of the program. M101 is reset with M102.
You enter the number of the replacement tool in the RT column of the
tool table. If no tool number is entered there, the TNC inserts a tool
that has the same name as the momentarily active one. The TNC
starts the search from the beginning of the tool table and inserts the
first tool it finds.
The tool is changed automatically
„ after the next NC block after expiration of the tool life, or
„ at latest one minute after tool life expires (calculation is for a
potentiometer setting of 100%). This only applies if the duration of
the NC block is less than one minute; otherwise the change occurs
after the NC block concludes.
Prerequisites for standard NC blocks with radius compensation
R0, RR, RL
The radius of the replacement tool must be the same as that of the
original tool. If the radii are not equal, the TNC displays an error
message and does not replace the tool.
Prerequisites for NC blocks with surface-normal vectors and 3-D
compensation
See “Three-Dimensional Tool Compensation (Software Option 2),”
page 464. The radius of the replacement tool can differ from the radius
of the original tool. The tool radius is not included in program blocks
transmitted from CAM systems. You can enter the delta value (DR)
either in the tool table or in the TOOL CALL block.
If DR is greater than zero, the TNC displays an error message and does
not replace the tool. You can suppress this message with the
M function M107, and reactivate it with M108.
The function of M101 can vary depending on the individual
machine tool. The machine tool manual provides further
information.
An automatic tool change with active radius
compensation is not possible if an NC program is used on
your machine for the tool change. The machine tool
manual provides further information.
If the tool life ends while M120 (look ahead) is active, the
TNC waits to change the tool until after the block in which
you canceled the radius compensation with an R0 block.
The TNC automatically changes the tool even if a fixed
cycle is being run.
The TNC does not automatically change the tool as long
as a tool change program is running.