[step-manufacturing] Agenda for conference call this Wednesday Feb 26th

[Martin Hardwick]

Hi Aydin,

Yes this may be an issue.

So far we have only considered the delivery of planning data to 
manufacturing and for this case it seems reasonable to consider the data 
RESTful.

The primary use case is to enable a phased adoption of STEP-NC on the 
shop floor. First phase is to use STEP GD&T stage models with legacy 
Gcode programs to enable applications such as 5-axis cutter 
compensation. Second phase is to adopt the full STEP-NC model to enable 
applications such as feed-speed optimization and run time collision 
detection.

Extending the architecture to include run time information seems like a 
useful thing to do. This is where the intersection with infrastructures 
such as MT Connect will become important.

STEP has always had a little bit of an issue with product instances. PLM 
modeling makes a big deal of this and there is still an ongoing conflict 
between the STEP CAD guys and the PLCS team.

I do not see the proposed REST architecture as being any better or worse 
than STEP in this respect.

There are many RESTful systems that break the rules a bit and allow web 
applications to edit and even make new files within the architecture.

I guess the key question is how badly would we need to break the 
architecture in order to support a manufacturing run time environment.

I would be very interested if you have any proposals.

Martin Hardwick
Professor of Computer Science, RPI
President STEP Tools, Inc.
Team Leader ISO STEP-Manufacturing

On 2/24/2014 1:33 PM, Aydin Nassehi wrote:
> Dear Martin
>
> I just had a look at the REST Architecture presentation. I think 
> having the folder structure is useful. My concern is that RESTful 
> services are stateless, whereas, manufacturing, in general, is 
> anything but. If you want to, for example, calculate tool wear in the 
> process, essentially the functions have side effects and as such 
> RESTful services do not seem like the natural choice. What are your 
> thoughts on this?
>
> Best regards
> Aydin
>
> ---
> Aydin Nassehi
> Senior Lecturer (Associate Professor), CIRP Associate Member, FHEA, MIET
> & Managing Editor of International Journal of Computer 
> Integrated Manufacturing
> Department of Mechanical Engineering
> University of Bath, Bath
> BA2 7AY
>
> Tel: +44 (0) 1225 386692
> Fax: +44 (0) 1225 386928
>
>
>
>
>
>
> On 24 Feb 2014, at 16:06, Martin Hardwick <hardwick at steptools.com 
> <mailto:hardwick at steptools.com>> wrote:
>
>> All,
>>
>> We will have our next conference call this Wednesday, February 26th. 
>> The suggested agenda is as follows:
>>
>> 1. First demonstration of the STEP-NC simulator
>> 2. Report back from the OMAC meeting
>>     a. 5-axis cutter compensation: 
>> ftp://www.steptools.com/private/CAM_exchange/Cycle_3/Five_axis_cutter_compensation.pptx
>>     b. REST Architecture: 
>> ftp://www.steptools.com/private/CAM_exchange/Cycle_3/v2_REST_architecture_for_in_process_manufacturing_models.pptx
>> 3. Next round of tooling optimization: 
>> ftp://www.steptools.com/private/CAM_exchange/Cycle_3/v1_HARDMOLDY_2.zip
>>
>> The times are the same: 4PM France, 3PM UK, 10AM Eastern USA and 7AM 
>> Western USA.
>>
>> Martin Hardwick
>> Team Leader STEP-Manufacturing
>>
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>>
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