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PUNDIT/CMM
is a new software product of MetroSage LLC. It
is intended for use by the manufacturing community to enable the
production of design-based measurement programs of known reliability
for CMMs and other point-sample dimensional measurement devices.
This tool begins with a CAD design for the part to be manufactured
including (and providing introduction of if they are not part available
from the design) GD&T specifications, along with information
on the capabilities and performance of all components of the measuring
system, some of which may be incompletely specified. It produces
as output inspection program code in DMIS 3.0 format and performs
measuring system simulations leading to task-specific uncertainty
estimates for the GD&T parameters derived from the measurements,
in a manner compliant with ANSI/NCSL Z540-2 1997. In addition,
it provides a capability to strongly associate with the CAD geometry
GD&T parameters and other critical nonshape information about
the design and will perform checking adequate to ensure that the
tolerancing specification for the design is complete and unambiguous.
The need for a commercial product that embodies
these functions is based on the following facts. The current draft
of ISO 17025 requires task-specific uncertainty estimates
as a condition of traceability, and ISO 14253-1 gives economic value
to reliable uncertainty estimates by requiring that they be applied
as modifiers to the product specification when making conformity
judgments. In addition to these legal requirements, a commercial
product to fulfill these functions has value to manufacturers as
a tool to address issues of resource allocation and acquisition.
In a completely different arena, the simulation aspect of the product
would make it useful as a training device for measurement equipment
programmers and operators.
For CMMs and other point-sample devices, while
there are products that address isolated aspects of this problem,
a complete integrated solution previously has not been
available and there are aspects
of the problem that are not addressed by any other commercially-available
solution. The partial solutions to this problem, that do exist in
the commercial arena, are very demanding with respect to the amount
of effort required to generate the input data for a task-specific
uncertainty estimate, to the point that this effort will be unaffordable
to many members of the manufacturing community.
PUNDIT/CMM to provides a solution that enables a continuum of tradeoffs between
labor to characterize the measurement system and magnitude of the
uncertainty estimate at a given confidence, allowing the end user
to optimize decisions regarding investment in characterization vs.
minimization of the uncertainty estimate.
For further information about PUNDIT/CMM, please contact Dr.
Kim Summerhays or Dr. Jon Baldwin,
request a printed brochure containing a more extensive description
of PUNDIT/CMM, or download the brochure in pdf format.*
*Adobe Acrobat Reader is required to view the brochure. Download
Acrobat Reader .
**Microsoft PowerPoint is required to view the
presentation. A Free viewer can be downloaded from
Microsoft here.
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