past month we completed the Spring Topical Meeting on Structured
and Freeform Surfaces. Co-organized with euspen, the meeting
was international with Asia, Europe and the Americas all well
represented. The response was overwhelming. The original plan
for 70 attendees was expanded to 100 and even then people
were turned away for lack of meeting space. A total of 40
papers, including 13 poster papers and 2 tutorials were presented.
A meeting highlight was a tour of the University of North
Carolina at Charlotte precision engineering facilities. UNCC
were excellent hosts and we want to thank them for their hospitality,
and hard work supporting this conference.
we are turning our attention to our Annual Meeting. It is
being held in Denver, CO on November 13th to 18th.
Annual Meeting takes a broad systems approach. Papers are
presented across the breadth of precision engineering, encompassing
manufacturing processes, metrology tools, controls, environmental
effects, materials, standards and other related disciplines.
is your best opportunity to:
Present your latest developments in precision engineering
concepts and technology
Learn from other’s research presentations
Network with international experts from industry, academia
and government labs
Increase your knowledge through in-depth tutorials
Discuss your needs with manufacturers showcasing their latest
technology and try them out with your most challenging parts.
is a beautiful city on the front range of the Rocky Mountains.
The Denver Annual Meeting offers you an opportunity to learn,
grow professionally, expand your network, and enjoy a time
to rejuvenate in the many recreational activities within and
near the city.
look forward to hearing from you and seeing you at an ASPE
meeting in 2011.
Tom Dow, Executive Director
#4: ABBE (ALIGNMENT) PRINCIPLE*
manufacturing requires predictable motions. Predictable motions
require moving to an expected location as controlled by a
measurement scale. Unwanted angular motions along with a desired
linear motion will occur in moving elements. These angular
motions affect the accuracy of predicting the position of
the linear motion. Angular motion affects are magnified if
the line of motion is offset from the axis of the measurement
scale. The offset between where the measurement is made and
the machine/instrument action occurs is called the Abbe-Offset.
performance is maximized when the motion axis and the measurement
scale axis are collinear, or when the Abbe-Offset is zero.
Make the measurement and motion axes collinear whenever possible
Design to minimize the offset between the measurement scale
axis and the motion axis of the corresponding stage or,
Offset the measurement axis in the direction having minimal
pattern: METROLOGY FRAME
on "Patterns for Precision Instrument Design", a
classic ASPE tutorial by C. Teague, C. Evans and later D.
Swyt. It uniquely identifies 12 foundational mechanical concepts
or patterns driving precision in fabrication, assembly and
American Society for Precision Engineering promotes the
future of manufacturing in America by advancing precision engineering;
though supporting education; and encouraging the development
and application of precision principles.
founded in 1986, is a non-profit organization.
here to learn more about ASPE.