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<p>All,<br>
</p>
<p>My proposal is we have further discussions on how to define and
validate manufacturing tolerances using digital twins.<br>
</p>
For Boxy we made multiple in-process models and defined tolerances
on those models. This was a lot of work.<br>
<br>
For the fishhead we may not want to repeat this work and it is not
so practical because of the 5-axis machining. <br>
<br>
The color models we are making (see below) show that it is
reasonably easy for a digital twin simulator to detect when a face
is being machined by an operation.<br>
<br>
Therefore, for Edition 2 of AP238 we may want to add semantics to
associate a design tolerance with an operation so that internal or
external software can validate conformance (perhaps to a weaker
value) at the end of the operation.<br>
<br>
Martin Hardwick<br>
Convener WG15 Digital Manufacturing<br>
<br>
<br>
<img class="img-responsive img-rounded center-block"
src="http://www.steptools.com/blog/20171011_twin_machining/fishhead.png"
alt="Digital Twin Machining"><br>
<br>
<br>
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