HEIDENHAIN TNC 410 ISO Programming - Manual (Page 136)

110 5 Programming: Tools
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Tool change
Tool change position
A tool change position must be approachable without collision. With
the miscellaneous functions M91 and M92, you can enter machine-
referenced (rather than workpiece-referenced) coordinates for the tool
change position. If T0 is programmed before the first tool call, the TNC
moves the tool spindle in the tool axis to a position that is independent
of the tool length.
Manual tool change
To change the tool manually, stop the spindle and move the tool to the
tool change position:
U U U U Move to the tool change position under program control.
U U U U Interrupt program run, see “Interrupting machining,” page 377.
U U U U Change the tool.
U U U U Resume the program run, see “Resuming program run after an
interruption,” page 379.
Automatic tool change
If your machine tool has automatic tool changing capability, the
program run is not interrupted. When the TNC reaches a tool call with
T
, it replaces the inserted tool by another from the tool magazine.
Automatic tool change if the tool life expires: M101
The TNC automatically changes the tool if the tool life TIME2 expires
during program run. To use this miscellaneous function, activate M101
at the beginning of the program. M101 is reset with M102.
The tool is not always changed immediately, but, depending on the
workload of the control, a few NC blocks later.
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.
The tool change function can vary depending on the
individual machine tool. The machine tool manual
provides further information.
The function of M101 can vary depending on the individual
machine tool. The machine tool manual provides further
information.