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<u>Attendees</u><br>
Martin Hardwick, STEP Tools, USA
<br>
David Loffredo, STEP Tools, USA
<br>
Bengt Olsson, Sandvik, Sweden
<small><br>
</small>
Fred Proctor, NIST, USA
<br>
Leon Xu, Boeing, USA
<br>
Mikael Hedlind, KTH, Sweden<br>
Magnus Lundgren, KTH, Sweden<br>
Chris Pfeifer CCAT, USA<br>
Fiona Zhao, NIST,/New Zealand<br>
Larry Maggiano, Mitutoyo, USA<br>
<br>
<u>Apologies for Absence</u><br>
Sid Venkatesh, Boeing, USA<br>
Aydin Nassehi, U.Bath, UK<br>
Stephen Newman, U.Bath, UK<br>
Alain Brail, AlBavis, France
<br>
Bob Erickson, Pratt & Whitney, USA<br>
Ian Stroud, Switzerland<br>
David Odendahl, Boeing, USA
<br>
Anna Valente, ITIA-CNR, Italy<br>
<br>
The latest version of Boxy has 8 setups. It includes half inch
tooling, fixture data, cross section data for the half inch tooling
and it has the feeds and speeds recommended by Sandvik for the selected
tool.<br>
<br>
<a class="moz-txt-link-freetext" href="ftp://ftp.steptools.com/private/NIST/Boxy_Part_3-Axis_Machining_8_Setups_v5.238">ftp://ftp.steptools.com/private/NIST/Boxy_Part_3-Axis_Machining_8_Setups_v5.238</a><br>
<a class="moz-txt-link-freetext" href="ftp://ftp.steptools.com/private/NIST/8_Setup_Fixture_Assembly.pdf">ftp://ftp.steptools.com/private/NIST/8_Setup_Fixture_Assembly.pdf</a><br>
<br>
It was suggested that the model could be further improved by adding
consistent datum faces to each workpiece so that the differences
between the orientation of the part in each setup could be more easily
observed. It was also suggested that the feed/speed editor in the
STEP-NC Explorer should be updated to automatically update the feedrate
when the spindle speed changes,<br>
<br>
For the tool wear demonstration we will set a non-optimal spindle speed
and then demonstrate the excessive tool wear caused by the selection.
We will then select the optimal spindle speed and use the optimization
algorithm to determine the optimal feeds for that speed. We will then
demonstrate the reduced tool wear.<br>
<br>
NIST, Boeing and CCAT are all planning to machine the Boxy part for the
demonstration. The next target is to complete dry runs of the machining
by the next conference call (April 14). Other sites are welcome to
machine the part. The necessary software and data is on the STEP Tools
web site. <br>
<br>
We reviewed the AP-214 Usage Guide for the machine tool model. The
primary purpose of the Usage Guide is to allow AP-214 to be used to
exchange models of machine tools between users and machine tool
builders. The Usage Guide is using Part 110 of ISO 14649 to define its
requirements. As is always the case there are many of these
requirements so there was concern about how to help the vendors
implement the model. The first stage is clear: use AP-214 to deliver
the geometry of the machine tool as an assembly. The subsequent stages
are not so clear. The demonstrations suggest that the end users want
the second stage to be implementation of the kinematics model so that
the machining of a part can be simulated. For the vendors this would be
a significant implementation task that might first require many other
types of applications that need kinematics to be considered. Even for
machining we want to be able to simulate the kinematics of the fixtures
as well as the machine tool.<br>
<br>
<a class="moz-txt-link-freetext" href="ftp://ftp.steptools.com/private/NIST/Manufacturing_resource_modelling_2010-03-31.pdf">ftp://ftp.steptools.com/private/NIST/Manufacturing_resource_modelling_2010-03-31.pdf</a><br>
<br>
The machine tool Usage Guide will be further discussed at the NIST
meeting.<br>
<br>
The next call will be at the regular times on Wednesday April 14.
A
video of this call is on the ftp site.<br>
<br>
<a class="moz-txt-link-freetext" href="ftp://ftp.steptools.com/private/NIST/stepmanuf_telecon_20100331.wmv">ftp://ftp.steptools.com/private/NIST/stepmanuf_telecon_20100331.wmv</a><br>
<br>
Martin Hardwick<br>
Team Leader STEP-Manufacturing<br>
<br>
Action Items<br>
----------------<br>
STEP Tools to add more options to the feed/speed editor.<br>
KTH to add datums to Boxy workpieces.<br>
NIST to prepare a presentation on the HiPP model.<br>
NIST, Boeing and CCAT to dry run the machining.<br>
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