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`IPR2020-01139
`
`

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`In addition, the German-based company Zett Mess Technik GmbH,which haspreviously been in
`the U.S. market, now is looking to expandits presence here and has nameda new U.S.distributor,
`LDB Enterprises Ltd. (Schaumburg, IL), to market its AMPGseries of portable CMMs.In addition,
`Brown & Sharpe (North Kingstown,RI), better known for the stationary CMMsthatit produces,
`also markets a portable-arm CMMtoroundoutits productline.
`
`These choices do not includelaser trackers, another option sometimesused. These units are
`available from companies such as API (Gaithersburg, MD), Leica Geosystems (Norcross, GA), and
`Faro, which acquiredlaser tracker supplier SMX Corp. (Kennet Square, PA) in January 2002.
`
`Pros and cons
`
`While the names RomerInc. (Farmington Hills, MI) and Faro are well associated with portable-
`articulated arm coordinate measuring machines, other companies are now making a pushin the
`market. Axila Inc. (Farmington Hills) is a new U.S.-based companythat has had a presencein the
`U.S. market for a numberof years. Axila and Romerwere partners, but that partnership has been
`severed and now both companiesare vying for the U.S. market. The companythat is known as
`Romerin Europeis called Axila in North America, and the company known as Romerin North
`Americais called CimCore in Europe.
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`Not surprisingly, the biggest attraction of portable CMMs-- indeed,their raison d'etre -- has
`traditionally been their portability; wherever the job is, the portable CMM canfollow. Axila, for
`example, had an application that required the operatorto strap a portable unit to his back and
`spelunk underground to inspect componentsof a hydroelectric dam.
`
`Moretypicalis the use of portable CMMsonthe shopfloor. These moveable gagesare frequently
`used in automotive plants, for example, for jobs such as body-in-white inspections, or interior
`measurements on assembledor partially assembled vehicles. Portable CMMscan be used for
`componentssuch as powerplant turbine bladesthat are too large to move to a conventional,
`stationary CMM,or to measure small components withouthaving to take them off the production
`line.
`
`Not having to move the productoff the line to measureit is one benefit. Anotheris that portable
`CMMscould replace hard gages, which are expensive to buy and maintain, says Roman Granger,
`presidentof Axila.
`
`There are negatives. One drawback of portable CMMsis that they are manual, says David Genest,
`CMMproduct managerfor Brown & Sharpe. While the armsarerelatively lightweight, "after using
`one 35 times in a couple of weeks, you realize that you would rather have something comparable,
`but automatic. Also, the software is somewhatlimited," Genestsays.
`
`SimonRaab,president of Faro Technologies, says that the principal marketbarriers for portable
`CMMshavebeencost and accuracy, anduntil those barriers are breached, portable CMMsare not
`going to get a large degree of penetration. "The $20,000price rangeis the order of magnitude for
`
`0002
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`anybodythat hasa selection of height gages, calipers and micrometers. People are used to talking
`in that range."
`
`These negatives are changing. Price points are dropping andaccuraciesare getting better.
`Suppliers are improving the mobility of the units with lifts and counterbalanced arms.In addition,
`portable CMMsareintegrating new software. Brown & Sharpe's Gage 2000A,for instance, uses the
`PC-DMISsoftwarethatis available on its standard CMM,while Faro's newest product has software
`that facilitates geometric dimensioning and tolerancing (GD&T) measurements.
`
`"To a certain extent, when portable CMMscameout, they were cumbersome,difficult to use and
`the accuracy waspretty bad," says Len Belpedio, president of LDB Enterprises. "They havereally
`comea long way.Today,they are lighter, easier to use, more accurate, and they have more
`available software features."
`
`Following is a run-downof what someof the major portable CMM vendorshave been upto in the
`market.
`
`Faro gets personal
`Faro Technologies has a numberof new products, including the new laser tracker and a newtripod.
`Its newest product, however, is a portable CMMthatlooks to go small, in termsof price, accuracy
`andthetools it hopes to replace. This fall, the Florida-based companyis set to introduce its new
`Faro Gage, the Personal CMMthatit hopeswill be usedin place of one-dimensional tools such as
`calipers, height gages and micrometers while bringing more of the 3-D capabilities of larger
`
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`CMMS.
`
`Faro hasapplied for 10 new patents coveringvirtually every elementof this new articulated arm
`and application software. The Faro Gagehasa price tag of less than $20,000,whichis significantly
`less than most portable CMMson the market. The gage has a 48-inch diameter measurement
`range and a single point accuracy of 0.0002 inch (0.005 millimeter). To achieve this accuracy and
`cost structure, Raab says the company worked from the ground up on every elementof the portable
`articulated arm CMM.
`
`The six-axis arm hasthree axes with infinite rotation.It is internally counterbalanced for "neutral
`buoyancy," stress-free usage. It also warnsthe user of high-handling force through an audible
`alarm."It is the only arm with feeling," says Raab.
`
`The arm uses Faro's SoftCheck Tools, which are part-specific measuring programsthatare
`individually developed by a Faro design team,as well as built-in statistical process control (SPC)
`and GD&Talignment and reporting software. The gage extracts 3-D GD&T-based measurements
`that can be difficult and time-consumingto gather accurately using more conventional one-
`dimensionaltools, Raab says.
`
`0003
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`Romer's GridLOK
`
`Last December, Romerrolled out a new low-endportable unit called the Stinger. At around
`$18,000,the Stingeris priced at about half that of the company's top-of-the-line 3000i, andis
`designed forless sensitive applications that don't require the 0.0008inch (0.02 millimeter)
`accuracies of the 1.8 meter arm version of the 3000i, the companysays. The 30001is offered with
`1.8, 2.4, 2.8 and 3.6 meter-articulating arms.
`
`The Stinger introduction came on the heels of a Novemberrelease of Romer's GridLok Extended
`Reference system,a floor-based navigation system for use with the 3000i that enables users to
`inspectlarge parts or multiple small parts while maintaining arm accuracy anywherewithinits
`measuring area. Multiple arms maybe used at the sametime.
`
`"This solves leap-frogging problems," says Rob Martin, North American Sales Managerfor Romer.
`Leapfrogging errors are problemsthat stem from having to move the portable CMMin orderto
`measure parts larger than the measuring envelope. With each move, the potential for cumulative
`errors exists.
`
`"For the most part, what the GridLOKdoesfor the enduseris to eliminate set-up time," Martin
`says. "In the past, people would haveto bring in a large part and that could take several hours.
`With the GridLok device, you simply roll the vehicle in andstabilize it and start measuring."
`
`Axila's 8th dimension
`
`The Axila Orbital product, introduced to the U.S. market in 2000,is thefirst eight-axis portable
`CMMonthe market, says Granger. The Orbital is aimed at large volumeinspections.It can
`measure a 20-foot part within 0.006-inch (0.15millimeter) in standard deviation directly on the
`shopfloor. Local accuracy is under 0.003-inch (0.07millimeter) in a 2.5 meter volume.
`
`With the GridLOK,extended reference measuring accuracies are constantbecauseall of the point
`references are known by the system. The system is based uponthepositioning of conical seats
`installed in a concrete floor or an optionalsteel plate. The conical seats are permanently flush
`mounted and valuedbya laser tracker. The system software then uses algorithms to recognize
`probelocations in orderto referenceinto the grid coordinate system. This eliminates the need to
`input positional X, Y and Z data while referencing orrelocating.
`
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`The Orbital uses the six-axis portable CMM arm,called the Arm 100. The additional two axes come
`from the rod that extends the Orbital's measuring envelope up to 20 feet. The Orbital is mounted
`on a mobile tripod and weighs 10 pounds. Takenoff of the Orbital, the Arm 100 can be used to
`measure small parts up to 8 feet diameter with a 0.0027-inch (0.07 millimeter) standard deviation.
`
`Orbital comes with G-Pad geometric software. G-Pad is the only Windowssoftware that can be
`used without a keyboard, Axila says. The Orbital works as a 3-D mouse.
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`Cameras Get Smart
`
`LMNOPMQÿSOTÿUNMPT
`VWMXYTZÿ[\\]^MTY]\Q_ÿ`MabY\Oÿc]]XQÿSOTÿdYQY]\
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`fMTTXY\gÿTbOÿSP]hTbÿ]iÿcY\ÿjbYQkOPQ
`
`Quality Innovations: Machine Tools Get Vision
`
`Quality Innovations: Here Comes the Scan
`
`Battling the Growth of Tin Whiskers
`
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`


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