HEIDENHAIN TNC 620 User Manual page 328

8
Sequence of tool-oriented machining
Requirements
Requirements for tool-oriented machining:
The machine manufacturer must define a tool-change macro for
tool-oriented machining
The tool-oriented machining methods TO and CTO have to be
defined in the pallet table
The NC programs are using the same tools to at least some
extent
The W-STATUS of the NC programs permits further machining
Sequence
1 The entry TO or CTO tells the control that the tool-oriented
machining is valid beyond these lines of the pallet table
2 The control executes the NC program with the entry TO up to the
TOOL CALL
3 The W-STATUS changes from BLANK to INCOMPLETE and the
control enters a value into the CTID field
4 The control executes all other NC programs with the entry CTO
up to the TOOL CALL
5 The control uses the next tool for the following machining steps if
one of the following situations applies:
The next line in the table contains the entry PAL
The next line in the table contains the entry TO or WPO
There are lines in the table that do not yet contain the entry
ENDED or EMPTY
6 The control updates the entry in the CTID field with each
machining operation
7 If all table lines of the group contain the entry ENDED, the control
processes the next few lines in the pallet table
Resetting the machining status
If you want to start machining again, change the W-STATUS to
BLANK or remove the previous input.
If you change the status in the PAL line, all FIX and PGM lines below
this line are automatically changed, too.
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HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
Pallets | Tool-oriented machining