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Attendees <br>
Martin Hardwick, STEP Tools, USA <br>
Mikael Hedlind, KTH, Sweden <br>
David Loffredo, STEP Tools, USA <br>
Fred Proctor, NIST, USA <br>
Bengt Olsson, Sandvik, Sweden <br>
Leon Xu, Boeing, USA <br>
Erik Jacobson, GE Energy, USA<b><br>
</b>Ronnie Fesperman, NIST, USA<span style="color: rgb(31, 73,
125);"></span><br>
Andreas Archenti, KTH, Sweden<br>
Vincent Marchini, Ameritech, USA<br>
Alain Brail, AlBavis (Airbus retired), France<br>
David Odendahl, Boeing, USA<br>
Sid Venkatesh, Boeing, USA<br>
<br>
Apologies for Absence<br>
Bob Erickson, Pratt & Whitney, USA<br>
<br>
We reviewed the EXPRESS-G model for ASME B5.59-2. The model uses
measurements to approximate machine tool errors. The model allows a
series of measurements to be made most notably in the forward and
backwards direction for each axis. These measurements are then
stored in an error table so that a system can construct an estimate
for the location of the tool for any programmed point. A similar
principle is applied to compute an estimate for the roll, pitch and
yaw of the axis. <br>
<br>
We reviewed the implementation of ISO 13399 in the STEP-NC Explorer.
Using the clamping values to set the tool length is not realistic
because these values will not be understood by the end user. A more
direct interface is needed with the clamping limits being used to
give advice on the limits of the tool length. We need to do more
testing and include tools with three assembly items. <br>
<br>
We discussed the likely implementation strategies for the ISO 13399
cutting tool model. The MT Connect initiative is developing an
Internet API for ISO 13399 in Part 4 of the MT Connect standards.
This interface will be used by machine tools to give remote
applications access to information about the cutting tools on the
machine tool. KTH and STEP Tools are mapping ISO 13399 into Edition
3 AP-214. This mapping will allow annotative and semantic GD&T
data to be included in a cutting tool data set. <br>
<br>
A recording of the call is on the ftp site at the address below. The
next call will be at the usual times on Friday May 20. <br>
<a class="moz-txt-link-freetext"
href="ftp://www.steptools.com/private/Undecided/stepmanuf_telecon_20110506.wmv">ftp://www.steptools.com/private/Undecided/stepmanuf_telecon_20110506.wmv</a><br>
<br>
Action Items<br>
1. Ronnie Fesperman to prepare a presentation on how to map a
nominal tool pose (position and orientation) into an actual pose
estimate using ASME B5.59-2<br>
2. STEP Tools to update the ISO 13399 interface to modify tool
assemblies using the tool length.<br>
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