HEIDENHAIN TNC 640 User Manual page 668

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After you have defined the monitoring area, you can press the
following soft keys in addition to the GO BACK soft key:
The TNC will save the current image and return
to the program run screen. If you changed
the configuration, the TNC will perform an
image evaluation. (See "Results of the image
evaluation")
The status display at the top right displays the
word "Reference". You have marked the current
image as the reference image. Since a reference
image can never be an error image at the same
time, the soft key IMAGE OF ERROR turns gray.
(For more information, See "Fundamentals",
page 656)
The status display at the top right displays the
word "Error". You have marked the current image
as the error image. Since an error image can
never be a reference image at the same time,
the soft key REFERENCE IMAGE (For more
information, See "Fundamentals", page 656)
The soft key row changes. You are now able
to change your previously entered settings
with respect to the monitoring area and the
sensitivity. If you carry out the change in this
menu, this may impact all of your images. (For
more information, See "Configuration", page 663)
The TNC will save the current image and return
to the program run screen. If you changed the
configuration, the TNC will perform an image
evaluation. (For more information, "Results of the
image evaluation")
As soon as the TNC generated at least one reference
image, images will be evaluated and errors displayed.
If an error is not detected the following message is
displayed: Too few reference images: Select the
next action by soft key!. This message is no longer
displayed once the number of reference images defined
number in parameter Q617 has been reached.
The TNC will generate mean image taking into account
all reference images. During evaluation, new images are
compared with the mean image under consideration
of the variance. Only once all reference images are
available does the cycle no longer stop if there are not
enough reference images.
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Visual Setup Control VSC (Software Option 136) | Workspace Global (Cycle 600)
HEIDENHAIN | User's manual for cycle programming | 10/2017