HEIDENHAIN TNC 320 (77185x-01) ISO programming - Manual (Page 170)

Programming: Tools
5.2 Tool data
5
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TNC 320 | User's Manual for DIN/ISO Programming | 3/2014
Tool change
The tool change function can vary depending on
the individual machine tool. Refer to your machine
manual.
Tool change position
The tool change position must be approachable without collision.
Use the miscellaneous functions
M91 and M92 to enter machine-
based (rather than workpiece-based) coordinates for the tool
change position. If
T 0 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:
Move to the tool change position under program control
Interrupt program run and see "Interrupt machining", page 453
Change the tool
Resume program run and see "Resuming program run after an
interruption", page 454
Automatic tool change
If your machine tool has automatic tool changing capability, the
program run is not interrupted. When the TNC reaches a
T it
replaces the inserted tool by another from the tool magazine.
Automatic tool change if the tool life expires: M101
The function of M101 can vary depending on the
individual machine tool. Refer to your machine
manual.
When the specified tool life has expired, the TNC can automatically
insert a replacement tool and continue machining with it. Activate
the miscellaneous function
M101 for this. M101 is reset with
M102.