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MEASUREMENT IN AEROSPACE


Usability was a prime objective for Hexagon. “What we have done with the AT960 and T-Scan 5 combination is to make it easy enough for anyone in the production facility to pick up our equipment and go make measurements with


them,” he said. “In the past, it took good operators to make good measurements and we wanted it so that anyone can make good measurements.”


Other Two-Step Solutions Creaform (Lévis, Quebec, Canada) is another


API will be releasing in 2015 a new product they call RapidScan, a white- light-based spatial co-related stereovision system. Attaching an SMR to it will allow it to provide a 6 DOF enhancement to its line of laser trackers.


S-191 The ultimate machining solution… for small precise parts.


 Multitasking high speed mill-turn machine


 High speed high torque spindle featuring «shock protection»


 Endless possibilities with 90 tool magazine


 Modular retaking unit with True Counter Spindle


 Produce from bar (3-65mm) or blanks with automation


 Designed for quick change over, rapid set-up and ease of use


Starrag USA Inc. 2379 Progress Drive Hebron, Kentucky 41048 P: +1 859-534-5201


www.bumotec.ch www.starrag.com


metrology provider offering noncontact solutions. It delivers both laser scanning technology and white- light systems, according to Jérôme-Alexandre Lavoie, product manager. One system of particular interest to aerospace is a 6 DOF, two-part solution that uses Creaform’s MetraSCAN 3D scanner in tandem with its C-track dual-camera sensor. Used in isolation, the C-Track dual-camera sensor is similar to a laser tracker: it triangulates position from refl ective targets (these look like round bulls-eye stickers) attached to parts and fi xtures. It also has similar line-of-sight limitations as a laser tracker. Creaform’s solution for 6 DOF is to track a MetraSCAN 3D. This is a laser scanner surrounded by a number of highly refl ective targets for the C-Track to lock onto. Offered in two hand-held versions, the MetraSCAN 70 has a laser cross-section of 70 × 70 mm; the MetraSCAN 210’s is 210 × 210 mm. Both collect 36,000 points per sec- ond with a best volumetric accuracy of 85 µm (to the ASME B89.4.22) with the C-Track 780 option. It also has automatic alignment and dynamic referencing, with the coordinate sys- tem locked onto the part rather than an external origin. The technique is uniquely insensitive to vibration or thermal gradients, said Lavoie. Vibration does not affect measurements for part sizes ranging from 1 to 10 m. “For parts bigger than 3 m, it’s easy to move the C-Track along the part itself and now the system will, in real time—in every measurement—calculate the relationship between the scan- ner and the part and eliminate loss of accuracy from vibra- tion,” he said. These scanners can also take advantage of Creaform’s C-Link for simultaneous measurement with up to four different C-Track 780s in a single reference system. Multiple C-Tracks make it even easier to measure large and/ or complex parts without having to move a single C-Track. Aerospace and automation is another important trend


Creaform sees developing. The company’s answer to that is the MetraSCAN-R, a robot mounted MetraSCAN. Also avail- able in 70 or 210-mm scan versions, it also boasts 85-µm accuracy (to the ASME B89.4.22) and dynamic referencing using up to four C-Track 780s.


66 AdvancedManufacturing.org | April 2015


Photo courtesy API


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