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<u>Attendees</u><br>
Martin Hardwick, STEP Tools, USA <br>
David Loffredo, STEP Tools, USA <br>
Fred Proctor, NIST, USA <br>
Fiona Zhao, NIST,/New Zealand<br>
David Odendahl, Boeing, USA <br>
Vincent Marchini, Ameritech, USA<br>
Mikael Hedlind, KTH, Sweden<br>
Alain Brail, AlBavis, France<br>
Sid Venkatesh, Boeing, USA<br>
Leon Xu, Boeing, USA<br>
Rich Morihara, Boeing, USA<br>
Larry Maggiano, Mitutoyo, USA<br>
<br>
<u>Apologies for Absense</u><br>
<small></small>Bengt Olsson, Sandvik, Sweden<br>
Magnus Lundgren, KTH, Sweden<br>
<br>
We continued our discussion of the scope of the demonstration. It was
observed that the FARO arm we will be using for the demonstration is
less accurate than the machine tool probe. Therefore, we will not be
showing any improvements if we use the arm instead of a probe to
measure the setups. However, it was also observed that maybe this is a
good thing because if the arm is less accurate then we will obviously
not be trying to convince anyone that the technology being shown is a
better way to make parts. Instead we will be showing a proof of concept
of closed loop machining using STEP-NC and if anyone needs to be
impressed we will start whirling our arms and talking about the machine
to measure demonstration we want to do next.<br>
<br>
Thus our goals for the demonstration are as follows:<br>
1. Develop and test a closed loop machining extension for STEP-NC.<br>
2. Verify the ST-Machine software can manage probing operations for a
part with multiple setup's.<br>
<br>
We discussed the tasks that need to be completed for the next
demonstration. A list of action items has been developed and the list
was extended during the call.<br>
<a class="moz-txt-link-freetext" href="ftp://www.steptools.com/private/Renton/Actions.txt">ftp://www.steptools.com/private/Renton/Actions.txt</a><br>
<br>
We discussed measurement features and the closed loop machining model.
Measurement features were developed for AP-219 but have not yet been
implemented in any software. In STEP-NC there are many geometry models
and some manufacturing feature models but as yet no measurement feature
model. We could add the AP-219 measurement feature model to STEP-NC but
the first feature we want to test is an axis2_placement_3d as defined
by three faces. There is no equivalent feature in AP-219 though one
could be constructed from two edges. We decided to not add any
measurement features to STEP-NC in this round and instead measure the
geometry directly. The closed loop machining model has been revised to
make it clear that there are no measurement features. The new version
is on the ftp site.<br>
<a class="moz-txt-link-freetext" href="ftp://www.steptools.com/private/Renton/Closed_loop_model.txt">ftp://www.steptools.com/private/Renton/Closed_loop_model.txt</a><br>
<br>
The next call will be at the regular times on Wednesday August 18.<br>
<br>
Martin Hardwick<br>
Team Leader STEP-Manufacturing<br>
<br>
Action Items<br>
----------------<br>
David Odendahl to make an AP-203 model of the probe used on the Boeing
Okuma machine.<br>
David Loffredo to begin mapping the closed loop machining model into
the AP-238 AIM<br>
Rich Morihara to measure an origin (with axes) using the FARO arm and
to send the data to STEP Tools<br>
<br>
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