CAD data exchange: Difference between revisions

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{{Short description|Method of CAD drawing file translation}}

'''CAD data exchange''' is a method of [[Engineering drawing|drawing]] [[data exchange]] used to translate between different [[computer-aided design]] ([[Computer-aided design|CAD]]) authoring systems or between CAD and other downstream [[CAx]] systems.<ref name="Schoonmaker2003">{{Cite book|last=Schoonmaker|first=Stephen J.|url=https://www.worldcat.org/oclc/50868192|title=The CAD guidebook : a basic manual for understanding and improving computer-aided design|date=2003|publisher=Marcel Dekker|isbn=0-8247-0871-7|___location=New York|oclc=50868192}}</ref>{{Rp|page=157}}

Many companies use different CAD systems and exchange CAD data file format with suppliers, customers, and subcontractors.<ref name=":2" /> Such formats are often proprietary.{{r|Schoonmaker2003|p=157}} Transfer of data is necessary so that, for example, one organization can be developing a CAD model, while another performs analysis work on the same model; at the same time a third organization is responsible for manufacturing the product.<ref name=":05">Xu, X. (2009).&nbsp;''Integrating advanced computer-aided design, manufacturing, and numerical control: Principles and implementations''. Hershey, PA: Information Science Reference.</ref>

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** 238 ([[STEP-NC]] Application interpreted model for computerized numerical controllers) – CAD, [[Computer-aided manufacturing|CAM]], and [[CNC]] machining process information.

** 242 (Managed model based 3D engineering) – the merging of the two leading STEP application protocols, AP 203 and AP 214.

;[[Parasolid]] XT: Part of the Parasolid [[geometric modeling kernel]] originally developed by [[Shape Data Limited|Shape Data]] and currently owned by [[Siemens Digital Industries Software]].<ref>Weisberg, D. E. (2008). ''The Engineering Design Revolution – The People, Companies and Computer Systems That Changed Forever the Practice of Engineering''. Retrieved October 29, 2016, from http://www.cadhistory.net {{Webarchive|url=https://web.archive.org/web/20180415195158/http://www.cadhistory.net/ |date=2018-04-15 }}</ref> Parasolid can represent wireframe, surface, solid, cellular and general non-manifold models. It stores topological and geometric information defining the shape of models in transmitting files. These files have a published format so that applications can have access to Parasolid models without necessarily using the Parasolid kernel.<ref>Siemens. (2008, April). Parasolid XT Format Reference. Retrieved October 29, 2016, from http://www.plm.automation.siemens.com/de_de/Images/XT_Format_April_2008_tcm73-62642.pdf {{Webarchive|url=https://web.archive.org/web/20161109090210/http://www.plm.automation.siemens.com/de_de/Images/XT_Format_April_2008_tcm73-62642.pdf |date=2016-11-09 }}</ref> Parasolid is capable of accepting data from other modeler formats. Its unique tolerant modeling functionality can accommodate and compensate for less accurate data.<ref>Radhakrishnan, P., & Subramanyan, S. (1994). ''CAD/CAM/CIM''.</ref>

;[[IGES]] (Initial Graphics Exchange Specification): An outdated format originated in late 1979 and initially published by the American National Standards Institute (ANSI) in 1980 preceding the large-scale deployment of the CAD technology in the industry.<ref>{{Cite journal|last1=Björk|first1=Bo-Christer|last2=Laakso|first2=Mikael|title=CAD standardisation in the construction industry — A process view|journal=Automation in Construction|volume=19|issue=4|pages=398–406|doi=10.1016/j.autcon.2009.11.010|year=2010}}</ref> This file format considers the product definition as a file of entities, with each entity being represented in an application-independent format.<ref name=":05" /> After the initial release of [[ISO 10303|STEP (ISO 10303)]] in 1994, interest in further development of IGES declined, and Version 5.3 (1996) was the last published standard.<ref name=":15" />

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In a true PLM environment, CAD to CAM data exchange must provide for more than the transfer of geometry. [[Product Manufacturing Information]], whether generated by the designer for use by manufacturing, or generated by the manufacturing organization for use by design, must be a part of the data exchange system. [[STEP-NC]] was designed to carry [[GD&T]] and other PMI through CAD and CAM into a CNC.

== See also ==

* [[Comparison of CAD, CAM, and CAE file viewers]]

== References ==