HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 152)

152 Programming: Tools
5.2 T
ool data
Tool change
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 TOOL CALL 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 (see "Interrupting machining", page 332)
 Change the tool
 Resume program run (see "Resuming program run after an
interruption", page 334)
The tool change function can vary depending on the
individual machine tool. The machine manual provides
further information.