New And Changed Cycle Functions Of Software 34059X - HEIDENHAIN TNC 640 User Manual

Fundamentals | Optional parameters
Optional parameters
The comprehensive cycle package is continuously further
developed by HEIDENHAIN. Every new software version thus
may also introduce new Q parameters for cycles. These new Q
parameters are optional parameters, which were not all available
in some older software versions. Within a cycle, they are always
provided at the end of the cycle definition. The section "New and
changed cycle functions of software 34059x-08" gives you an
overview of the optional Q parameters that have been added in
this software version. You can decide for yourself whether you
would like to define optional Q parameters or delete them with
the NO ENT key. You can also adopt the default value. If you have
accidentally deleted an optional Q parameter or if you would like
to extend cycles in your existing programs after a software update,
you can include optional Q parameters in cycles when needed. The
following steps describe how this is done:
To insert optional Q parameters in existing programs:
Call the cycle definition
Press the right arrow key until the new Q parameters are
displayed
Apply the default value or enter a value
To transfer the new Q parameter, exit the menu by pressing
the right arrow key once again or by pressing END
If you do not wish to apply the new Q parameter, press the
NO ENT key
Compatibility
The majority of part programs created on older HEIDENHAIN
contouring controls (TNC 150 B and higher) can be executed with
this new software version of the TNC 640. Even if new, optional
parameters ("Optional parameters") have been added to existing
cycles, you can normally continue running your programs as usual.
This is achieved by using the stored default value. The other way
round, if a program created with a new software version is to be
run on an older control, you can delete the respective optional
Q parameters from the cycle definition with the NO ENT key.
In this way you can ensure that the program will be downward
compatible. If NC blocks contain invalid elements, the TNC will
mark them as ERROR blocks when the file is opened.
HEIDENHAIN | User's manual for cycle programming | 10/2017
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