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<u>Attendees</u><br>
Martin Hardwick, STEP Tools, USA <br>
David Loffredo, STEP Tools, USA <br>
Vincent Marchini, Ameritech, USA<br>
Rich Morihara, Boeing, USA<br>
Bengt Olsson, Sandvik, Sweden<br>
Alain Brail, AlBavis, France<br>
Fred Proctor, NIST, USA <br>
Fiona Zhao, NIST,/New Zealand<br>
David Odendahl, Boeing, USA <br>
Mikael Hedlind, KTH, Sweden<br>
Sid Venkatesh, Boeing, USA<br>
Magnus Lundgren, KTH, Sweden<br>
<br>
<u>Apologies for Absence</u><br>
Leon Xu, Boeing, USA<br>
Bob Erickson, Pratt & Whitney, USA<br>
Larry Maggiano, Mitutoyo, USA<br>
<br>
We discussed the requirements for closed loop machining which have
now been documented and are available on the ftp site at the
following location:<br>
<br>
<a class="moz-txt-link-freetext" href="ftp://www.steptools.com/private/Renton/Closed_loop_schema_20100830.pdf">ftp://www.steptools.com/private/Renton/Closed_loop_schema_20100830.pdf</a><br>
<br>
The following observations were made about the requirements.<br>
<br>
1. It is not clear how or if the measurement_evaluation entity can
compensate the diameters or depths of drilling holes. The
correction in the current measurement_evaluation entity is defined
by a cartesian_transformation operator. A cartesian operator
operator might be able to grow or shrink a hole attribute but even
if one was built it would be an indirect way to modify one of these
attributes.<br>
<br>
2. The error control may need to be performed on a finer level of
detail than allowed by the current requirements model. For example,
because of the origin of the fixture a large degree of change might
be tolerable or expected for the X coordinate of a setup while only
a small change in the Y might be allowed. Similarly, the user might
want to closely control any changes to the orientation of the part.<br>
<br>
3. If a tool path containing arc's is modified by a compensation
then the radii of those arcs shall not change. If a change to the
definition is necessary to maintain the definition of the arc when
the end points have moved then the center point should be changed.<br>
<br>
Completing the ARM requirements and then mapping those requirements
to the AIM is now on the critical path because further experiments
cannot be made with the FARO arm until the STEP-NC software is
changes so that it can process machine frame definitions and place
the measurements in the correct context. Therefore, continuing
changes to the model were left to the discretion of STEP Tools and
its software development schedule. Further changes can be discussed
at the Renton meeting.<br>
<br>
The next call will be at the regular times on Wednesday September 8.<br>
<br>
The video recording for this weeks call is below.<br>
<a class="moz-txt-link-freetext" href="ftp://www.steptools.com/private/Renton/stepmanuf_telecon_20100901.wmv">ftp://www.steptools.com/private/Renton/stepmanuf_telecon_20100901.wmv</a><br>
<br>
Martin Hardwick<br>
Team Leader STEP-Manufacturing<br>
<br>
Action Items<br>
----------------<br>
Martin Hardwick to continue refining the requirements model.<br>
David Loffredo to map the requirments model into the AIM.<br>
David Odendahl to make a STEP model of the Okuma machine tool.<br>
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