HEIDENHAIN iTNC 530 173
5.2 Tool Data
Tool change
Tool change position
The tool change position must be approachable without collision. With
the miscellaneous functions M91 and M92, you can 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:
U Move to the tool change position under program control.
U Interrupt program run (see "Interrupting machining", page 525).
U Change the tool.
U Resume program run (see "Resuming program run after an
interruption", page 528).
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.
The tool change function can vary depending on the
individual machine tool. The machine tool manual
provides further information.
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