All Features
Fred Mason
Measurements add value to the parts you manufacture. That may not be a widely accepted position, because the act of measuring is an additional step in the manufacturing sequence, and every step has a cost associated with it. With pressure to reduce costs and improve productivity, some might think…
William R. Gilman
Metrology is the science of measurement. It’s a very broad topic because so much is measured. In manufacturing, the need to verify and validate dimensions of parts is crucial. These dimensional measurements are done at many stages in the manufacturing process with a range of devices, from simple…
Frank Powell
Machine tool and manufacturing system builders have been producing increasingly intelligent equipment for more than 50 years, and today’s computer numeric controlled (CNC) machines and systems are marvels of technology. However, they still need intensive human supervision and…
The need to measure things inspired some of the earliest tools invented by man. Basic measurements were needed for constructing dwellings of an appropriate size and shape, fashioning clothing, or bartering food or raw materials. Understandably, early man turned first to parts of his…
Thomas M. Findlan
When purchasing material test equipment for tensile, fatigue or other test modes, managers of test labs may want to compare new and used test equipment due to budget constraints or other factors. The problem is that there’s currently no easy way to determine if a particular used test…
Laser scanning makes it easy to keep older military equipment running by enabling companies to create spare parts that perfectly duplicate the originals at a reasonable cost. Manufacturers of weapons systems are taking advantage of new technologies, particularly the ModelMaker laser scanning…
Peter Dickin
The use of probes on machine tools to assist in setting up jobs is well established. Recent developments in machining and inspection software mean that this equipment can now be used in a wider range of applications that are aimed at increasing overall equipment effectiveness, which consequently…
Steve Kersen
Switching from a coordinate measuring machine (CMM) to a laser scanner has helped the National Aeronautics and Space Administration, Langley Research Center, increase the accuracy of models used to evaluate proposed spacecraft designs in wind tunnels. Accuracy is critical for the 6- to 12-in. scale…
Ken Lyons
Laser scanning keeps older military equipment running by enabling the creation of spare parts that perfectly duplicate the originals at a reasonable cost. MILPARTS and other companies are taking advantage of new technologies, particularly the ModelMaker laser scanning system, which make it possible…
Fluke Corp.
What is calibration anyway? Many people do a field comparison check of two meters, and call them “calibrated” if they give the same reading. This isn’t calibration. It’s simply a field check. It can show you if there’s a problem, but it can’t show you which meter is right. If both meters are out…
C. Martin Schuster
Foam Design Inc. of Lexington, Kentucky, builds a wide range of foam parts, including inserts for headliners used to protect against injuries in the event of a collision. Inspecting these components with a CMM was a tedious and error-prone process because of the difficulty involved in making…
Quality Digest
By adding a laser probe to a coordinate measuring machine (CMM), Sonaca, a large Belgian aerospace-structures supplier, has greatly increased the completeness of its inspections, obtaining full documentation of every component’s geometry. When the company inspected sheet metal components in the…
Pressure decay has been the most widely used method of leak testing in manufacturing production lines for decades. The process is uncomplicated, inexpensive and easily automated. Air is simply injected into a test object and any decrease in air pressure over time signifies a leak. However, the…
Bill Chambers
So you have a great product, and there’s a great demand for it. You’ve addressed how to quickly produce it, and now you need to ensure the quality—fast. You can’t afford delays and need to keep costs down. One way to accomplish this is with fixture gaging, a simple, easy-to-use quality control…
Claes Nylander
Leak testing is an essential element in product quality testing for a wide range of industries. From the automotive industry to heating, ventilation and air conditioning manufacturing, countless products and parts have to be tested for tightness in order to meet specifications and be granted the…
Rick Hudgell
As industry standards increase, so too does the demand for flexibility in specialized gaging procedures. Because there’s no room for error, choosing the right contact point or styli is paramount in conforming to the organization’s high quality standards. Accuracy can be jeopardized by any number of…
Many customers come to Hobson & Motzer seeking a solution for what others have claimed is impossible. Established in 1912 and based in Durham, Connecticut, Hobson & Motzer engineers manufacturing processes and designs tooling to produce seemingly impossible parts for companies worldwide.…
Test and measurement equipment (T&ME) must be periodically calibrated to ensure it’s operating within its specified parameters. Of course, the uncertainty of the system used to calibrate the equipment shouldn’t add appreciable error to this process.Test and measurement equipment (T&ME) must…
Quality Digest
Shortwave infrared (SWIR) imaging is quietly earning a growing place in industrial machine vision for quality inspection. SWIR imagers, sometimes also referred to as NIR imagers, can see objects and events that vision and thermal cameras cannot. Moreover, they’re’ smaller and lighter than all…
Gary Card
How many dimensional data points are enough to accurately describe a part feature? The key to answering this question is understanding the stability of the manufacturing process. In general, components should be measured only as often as required to ensure the stability of manufacturing processes.…
Gary Card
Coordinate measuring machines gather data by means of a probe or sensor. Conventional CMMs equipped with touch-trigger probes can use a stitch-scanning method to record point streams from part surfaces. In stitch scanning, the CMM lifts the probe head from the surface of the part, moves it slightly…
