Using Global Def Information - HEIDENHAIN TNC 640 User Manual

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Using GLOBAL DEF information

If you entered the respective GLOBAL DEF functions at the start

of the program, you can reference these globally valid values when

defining any machining cycle.

Proceed as follows:

Operating mode: Press the Programming key

Select machining cycles: Press the CYCLE DEF

Select the desired cycle group, e.g. drilling

Select the desired cycle, e.g. drilling

If there is a global parameter for this the TNC

displays the SET STANDARD VALUES soft key

Press the SET STANDARD VALUES soft key:

The TNC inputs the word PREDEF 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!

If you modify the program settings later with GLOBAL DEF the

modifications are effective on the complete machining program.

As a consequence the machining sequence can significantly

Use GLOBAL DEF intentionally and run a program test before

If a fixed value is entered in machining cycles, GLOBAL DEF

does not modify this value

Using Fixed Cycles | Program defaults for cycles

HEIDENHAIN | User's manual for cycle programming | 10/2017