The I++ (Inspection plus-plus) group is a loose consortium of European automobile manufacturers: Daimler, Audi, BMW, Opel, Volkswagen, Porsche, and Volvo. I++ DME is one of two current efforts pursued by the I++ group. I++ DME has demonstrable support from U.S. users and vendors of coordinate measuring machines (CMM) and CMM measurement plan execution software.
The scope of this industry-led effort is on the exchange of dimensional measuring equipment commands and results between measurement execution software and a CMM.
NIST’s role is to 1) contribute to the writing of I++ DME, 2) generate conformance tests, 3) design and conduct public interoperability tests, and 4) act as standards consultants and leaders in industry standards organizations through summit meetings and other initiatives.
- Adoption of I++ DME by a majority of vendors worldwide with compliant apps has been largely achieved due to
- Strong end user and CMM vendor support through groups such as I++ group, NIST, Dimensional Metrology Standards Consortium, International Association of CMM Manufacturers, and the Automotive Industry Action Group
- NIST I++ DME compliance test suite, allowing quick and compliant implementation development
- Five successful, non-trivial public interoperability tests in Europe and the U.S. initiated and lead by NIST, with willing participation for CMM software and hardware vendors worldwide
- Implementers meetings and public wiki site for implementer/spec-writer interaction
- Detailed analysis of the I++ DME specification by NIST and others early in the life of I++ DME
- I++ DME is NOT a standard, but rather a tightly controlled specification by a small group of CMM vendors and CMM end users
- Legal problems and concerns expressed at the NIST-organized Metrology Interoperability Summit Meeting 2006, were later addressed satisfactorily by the I++ Group
- I++ DME is for fixed CMMs only, and it remains to extend I++ DME to a variety of other types of CMMs, including CMMs with non-contact optical sensors, laser trackers, and articulated arm CMMs
- The I++ group has a vision for the entire standards infrastructure (includes I++ DMS)
- Commercial-Off-The-Shelf offerings of I++DME-compliant products are rare, even though the capability exists in alpha and beta software versions
- Harmonize America, Europe, Asia visions about the precise information content on the DME interface
- Encourage I++ DME standardization
- Encourage Commercial-Off-The-Shelf offerings of I++DME-compliant products
- Update NIST compliance test suite
- Extend I++ DME to portable metrology devices
February 1, 2008
Lead Organizational Unit: