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Attendees
<br>
--------------
<br>
Martin Hardwick, STEP Tools, USA
<br>
David Loffredo, STEP Tools, USA<br>
Julie Huang, Sandvik Sweden
<br>
Bengt Olsson, Sandvik, Sweden
<br>
Mikael Hedlind, Scania, Sweden
<br>
David Odendahl, Boeing, USA
<br>
Sid Venkatesh, Boeing, USA<br>
Charles Gilman, GE, USA<br>
Robert Erickson, Pratt & Whitney, USA
<br>
Vincent Marchetti, Ameritech, USA
<br>
Dan Finke, Penn State, USA
<br>
Chris Ligettii, Penn State, USA<br>
Tom Raun, Iscar, USA<br>
Than Huynh, Okuma, USA<br>
Will Sobel, SystemInsights, USA<br>
David Maderely, Siemens, UK<br>
Christian Callet, Datakit, France<br>
Alain Brail, Airbus (retired), France<br>
Ian Stroud, EPFL, Switzerland<br>
<br>
We discussed the Universal Plug and Play standard (UPnP). The
MTConnect Institute plans to incorporate the UPnP discovery
protocols, and harmonize with the UPnP sensor data specification, in
future editions of its standards.<br>
<a class="moz-txt-link-freetext" href="http://upnp.org/">http://upnp.org/</a><br>
<br>
In our projects we may be able to use the virtual rooms enabled by
UPnP as neutral places to connect systems that support STEP and
STEP-NC.<br>
<br>
We discussed an additive manufacturing file in the ".CLI" format
that has been converted to STEP-NC by STEP Tools. Three issues were
raised:<br>
<a class="moz-txt-link-freetext" href="ftp://www.steptools.com/private/additive">ftp://www.steptools.com/private/additive</a><br>
<br>
1. Are additive manufacturing processes portable between machines?<br>
A process designed for plastic is unlikely to operate for powder
metal or vice versa. However, if the goal is to apply an energy
profile, to a material, for a given time, then a solution that has
been designed for one machine should be portable to another machine
if the profile, time and material are described in a standard,
non-machine specific way.<br>
<br>
2. What is the advantage of controlling the process?<br>
If a part is only going to machined once then time spent on
optimizing the process may be better spent on other activities.
However, many organizations are announcing that they intend to
produce additive manufacturing parts in large quantities. For
example, General Electric has announced its intention to have
100,000 parts flying by 2020. In this case time spent optimizing the
process may be well spent. In subtractive machining this is done by
customizing the speeds and feeds to minimize tool wear and maximize
manufacturing speeds while meeting the required design tolerances.
In additive manufacturing there is a desire for similarly trade offs
in the material characteristics while meeting the constraints.<br>
<br>
3. How can we use the optimized data if additive manufacturing
machines are closed?<br>
The CLI format is only used by a small number of additive
manufacturing machines. However, Siemens has surveyed the industry
and found that most desktop machines are already using Gcodes. We
have a robust and growing interface from STEP-NC to these codes for
subtractive machining that we should be able to extend for additive
machining.<br>
<br>
We discussed the action items from the face to face meeting in
Orlando.<br>
<a class="moz-txt-link-freetext" href="ftp://www.steptools.com/private/CAM_exchange/Cycle_6/CAM_Exchange_Action_Items.pptx">ftp://www.steptools.com/private/CAM_exchange/Cycle_6/CAM_Exchange_Action_Items.pptx</a><br>
<ul>
<li>ARL's development of the XML planning data for Boxy has had to
be delayed until the next call.</li>
<li>GE is on track to get the CAD and CAM data for its airframe
bracket released to the group by April 1st and May 1st</li>
<li>Siemens has shared its code for NX to STEP-NC translation with
Boeing</li>
<li>Mitutoyo has agreed to develop a semantic GD&T model for
the CDS (NAS 979) part that captures the machining constraints<br>
</li>
</ul>
A recording of this conference calls is on the web site at the
address below:
<br>
<a class="moz-txt-link-freetext" href="ftp://www.steptools.com/private/CAM_exchange/Cycle_6/stepmanuf_telecon_20150304.wmv">ftp://www.steptools.com/private/CAM_exchange/Cycle_6/stepmanuf_telecon_20150304.wmv</a><br>
<br>
The next conference call is planned for Wednesday March 18th.
The times will be different for those outside of the USA because
Congress has declared that summer will start this Sunday despite
considerable evidence to the contrary.<br>
<br>
Martin Hardwick
<br>
Team Leader ISO STEP-Manufacturing
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