Your E-mail and Presentation "Machining features and Machinin g Process Features"

[Pascal Huau]

Martin,


Although I don't want to interfere in this US debate, may-be a way to solve
the issue about pre-eminence of AP238 on AP213 ed2 is to not delay any more
the NWI approval procedure for AP238.

Otherwise, if a NWI for AP213 ed2 is proposed, countries would have problems
to understand why a project officially proposed to ISO should be rejected
because of a project that has not been yet officialized 2 years after the
start of its PWI.


Regards,
Pascal Huau
Association GOSET
107,111 avenue Clemenceau
92000 Nanterre
France

----- Original Message -----
From: "Martin Hardwick" <hardwick at steptools.com>
To: "Jesse L. Crusey" <crusey at scra.org>; "Alan Crawford" <ALC at lsc.co.uk>;
"'chiaki sakamoto'" <chiaki_sakamoto at keg.komatsu.co.jp>; "Friedrich
Glantschnig" <fglantschnig at swissonline.ch>
Cc: "Alan Crawford" <ALC at lsc.co.uk>; "David Loffredo"
<loffredo at steptools.com>; "Frederick Proctor" <frederick.proctor at nist.gov>;
"Len Slovensky(AP224)" <slovensky at scra.org>; "Suk-Hwan SUH"
<shs at postech.ac.kr>; "Jochen Wolf" <j.wolf at wzl.rwth-aachen.de>; "Peter
Mueller" <peter.mueller at erlf.siemens.de>; "Yong Tak Hyun"
<hyt at wzl.rwth-aachen.de>; "Stefan Heusinger"
<stefan.heusinger at isw.uni-stuttgart.de>; <kisinami at coin.eng.hokudai.ac.jp>;
<step-manufacturing at steptools.com>
Sent: Friday, January 11, 2002 4:07 PM
Subject: RE: Your E-mail and Presentation "Machining features and Machinin g
Process Features"


>
>
> Jesse,
>
> AP-238 is used to exchange data between process planning (aka CAM systems)
> and CNC systems. For a CNC system AP-238 is the new input replacing the
> very old RS274D (G code) standard.
>
> Advantages of AP-238 as an input to the CNC include:
> * 3D geometry
> * Features (as defined in AP-224)
> * Sequencing language for operations that allows nested, conditional and
>   concurrent operations
> * Geometric (AIC 519) and parametric tolerances
> * Tool requirements (so the CNC can pick best available tool)
>
> There has been a tremendous effort in SC1 over the last 5 years to get
> International Consensus on the information requirements for AP-238.
> They are defined in ISO 14649 which is now at FDIS.
>
> In my view AP-213 has been sitting on the shelf for 5+ years because
> very few systems want to write AP-213 data and no systems want to read
> this data.
>
> I am very scared that the new AP-213 will try to become relevant by
> being an alternative method for exchanging data between CAM and CNC
> systems. Someone is already calling the new AP-213 STEP-NC.
> The Army has been told it is STEP-NC and so has Focus Hope.
>
> This will hurt the International consensus painfully built
> by SC1, and open Pandora's box because if one team is allowed to
> define a redundant manufacturing AP for CAM to CNC exchange then
> any group should be allowed to do so.
>
> Martin Hardwick
>