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<p>Hello,</p>
<p>Unfortunately I can't join today. Just a remark about the last
point, to propose in AP238E2 to associate with an operation, a
design tolerance. There is already a possibility (to be checked ?)
: because an operation can be associated to a machining feature,
we can get PMIs attached to it as a shape_aspect (dimensions,
tolerances). This makes the feature play a role of pivot, giving
an indirect access to tolerances attached to it.<br>
</p>
<br>
<div class="moz-cite-prefix">Le 16/10/2017 à 13:24, Martin Hardwick
a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:09c8219f-e663-5710-845a-907cd462389a@steptools.com">
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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>
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