Description

The OMAC User Group (www.omac.org) held their Annual Meeting in conjunction with the ARC Advisory Group Forum on February 3, 2005 at the Rosen Centre Hotel in Orlando, Florida USA. As part of this meeting, the Machine Tool Working Group demonstrated the use of ISO 10303 AP 238 ("STEP-NC") with commercial CAD/CAM and CNC systems.

Documents

The scenario for the February 2005 pilot demonstration. pilot-scenario.pdf.

The schedule for the February 2005 pilot demonstration. project-plan.ppt, project-plan.pdf

A description of the CNC functionality to be enabled by the AP-238 Class 1 subset to be shown at the Orlando demonstration. cc1-subset-orlando.doc, cc1-subset-orlando.pdf.

A document describing deployment of AP-238 in a plant, including what types of CNC controls are needed, and what software is available from vendors. ap238-plant-deployment.doc, ap238-plant-deployment.pdf.

A report on Boeing's experiences writing software to handle STEP-NC Conformance Class 1, with examples including STEP Part 21 and APT CL data, and a tutorial annex by STEP Tools Inc. recommended-ap238-practices.doc, recommended-ap238-practices.pdf.

A walkthrough tutorial slide presentation on navigating an AP-238 Conformance Class 1 file by STEP Tools Inc., toolpath-walkthru.ppt, toolpath-walkthru.pdf.
An AP-238 STEP file equivalent to the walkthrough, toolpath.stp.
A C++ program to create the data described in the slides and listed in the file, toolpath.cxx.

A report on a joint Boeing-NIST demonstration of AP-238 implementation on 5-axis machines at two facilities. nist-boeing-report.txt

Data Repository

The following data files are being used to drive the pilot demonstration at the OMAC STEP-NC Working Group meeting described above.

	The Circle-Diamond-Cone is a test part suitable for 5-axis machines. The AP-203 geometry file, cds5.stp.
	The Circle-Diamond-Square is a 3-axis counterpart to the circle-diamond-cone, without the interior conical pocket. The AP-203 geometry file, cds3.stp.

The AP-238 CC1 data file for the half-size NAS 979 circle- diamond- square- cone part, conforming to the DIS version of AP-238. This part has been machined by Boeing and NIST. NAS979_NIST.stp, 575 KB STEP Part 21 file.

The stock description and setup instructions for the NAS 979 part. Setup.doc, 590 KB MS-Word file.

The geometry file for the NAS 979 part, including fixturing. Everything.stp, 130 KB STEP Part 21 file.

Meeting Minutes

14 January 2005 Telecon

7 January 2005 Telecon

16 December 2004 Telecon

8 December 2004 Telecon

22 October 2004 Telecon

5 November 2004 Telecon

19 November 2004 Telecon

Contact:

Fred Proctor
National Institute of Standards and Technology
100 Bureau Drive, Stop 8230
Gaithersburg, MD 20899-8230
Email: frederick.proctor@nist.gov
Voice: 301-975-3425
FAX: 301-990-9688

* No approval or endorsement of any commercial product by the National Institute of Standards and Technology is intended or implied. Certain commercial equipment, instruments, or materials are identified in this report in order to facilitate understanding. Such identification does not imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the materials or equipment identified are necessarily the best available for the purpose.

The National Institute of Standards and Technology is an agency of the U.S. Department of Commerce, located 25 miles north of Washington, D.C. in suburban Gaithersburg, Maryland. A map to NIST is available on-line.

isd-webmaster@cme.nist.gov

Last updated: 1 April 2005