HEIDENHAIN TNC 320 - Using GLOBAL DEF Information; Global Data Valid Everywhere

Program defaults for cycles 2.2
2
HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
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Using GLOBAL DEF information
If you have entered the corresponding GLOBAL DEF functions at
the beginning of the program, then you can link to these globally
valid values when defining any fixed cycle.
Proceed as follows:
Operating mode: Press the Programming key
Select machining cycles: Press the CYCLE DEF
key
Select the desired group of cycles, for example:
drilling cycles
Select the desired cycle, e.g. DRILLING
The TNC displays the SET STANDARD VALUES soft
key, if there is a global parameter for it
Press the SET STANDARD VALUES soft key. The
TNC enters the word PREDEF (predefined) in the
cycle definition. You have now created a link to the
corresponding GLOBAL DEF parameter that you
defined at the beginning of the program
Danger of collision!
Please note that later changes to the program
settings affect the entire machining program, and
can therefore change the machining procedure
significantly.
If you enter a fixed value in a fixed cycle, then this
value will not be changed by the GLOBAL DEF
functions.
Global data valid everywhere
Safety clearance: Distance between tool tip and workpiece
surface for automated approach of the cycle start position in the
tool axis
2nd set-up clearance: Position to which the TNC positions the
tool at the end of a machining step. The next machining position
is approached at this height in the machining plane
F positioning: Feed rate at which the TNC traverses the tool
within a cycle
F retraction: Feed rate at which the TNC retracts the tool.
The parameters are valid for all fixed cycles with
numbers greater than 2xx.