Te CMM supports a wide variety of data collection modes including tactile scanning of geometric and freeform surfaces, noncontact laser scanning, optical imaging, and point-to-point measurement. While the Global Classic and the Optiv Clas- sic both offer touch trigger probing, each system has specific advantages: “Tere are many parts with features that a standard CMM just cannot reach. Tis is where the Optiv vision system comes into play. Equally the CMM is useful beyond normal part measurement—we also use it for troubleshooting problems with our molds,” explains Faughnan. Te Optiv Classic CMM combines vision and touch probe
inspection into one metrology platform, and has the ability to measure features too hard to see with the naked eye. Complex parts, stringent part specs and critical dimensions are par for the course in such industries as medical manufacturing or electronics. Te vision system and its multisensor technology can acquire precision measurements of tiny part features that can not be measured with traditional measurement systems. Te multisensor CMM is particularly useful for verifying critical dimensions and quick coordinate checks on parts, part programming on the machine or offline, and reverse engineer- ing applications.
Common Software has Benefits Te benefit of having the two systems from one supplier
is their common soſtware platform. Te CMM and the vision system both run PC-DMIS measurement soſtware. In many cases, it is simple to switch an inspection program from one system to the other, and programmers only have to learn one package. PC-DMIS integrates CAD into the measurement process and allows MGS to program inspection routines using STEP models from their customers. Te soſtware generates intuitive reporting and the capability to create an inspection program before a part has even been created. Te Optiv Classic works with a special vision module of
PC-DMIS. Users can create inspection programs off-line using CAD models, with accurate simulation of camera view, lighting and magnification parameters with the CADCamera feature. Tis leaves the vision system free for inspection tasks. Te inspection soſtware also provides advanced tools to develop, debug and execute measurement routines. By simply point- ing and clicking on a CAD model, geometry is selected and program parameters are easily defined. Te original design intent of medical and other parts is directly referenced using this methodology. PC-DMIS automatically extracts informa- tion from the CAD model and dramatically reduces the need for manual typing, a major source of programming errors. Measurement data from PC-DMIS can be automatically
fed into an SPC (Statistical Process Control) package for Cpk analysis, a measure of process capability. All data is stored
to allow full traceability for MGS and their customers. Part programs and fixtures are constructed to make it easy for the
injection molding machine operators to inspect their own parts. MGS Ireland’s operations are running 24/7, so the clear instructions and photographs provided in the PC-DMIS part programs make it simple for operators to correctly load and measure their components.
Quality Control for Customer Assurance Ireland is well known for its pharmaceutical industry. Te
use of measurement technology is a key component to obtain- ing business in this highly demanding sector. Te metrology equipment installed at MGS assures their customers that the parts they produce, and the processes used to produce them, are viable.
Plastic components are loaded to a multistage fixture on the CMM.
MGS Ireland continues to produce plastic parts for their
landlord, Hewlett-Packard, but their expansion plan is well advanced. In the spring of this year, the company will start construction on an ISO Class 8 cleanroom for molding and as- sembly operations, and is reconfiguring their plant to accom- modate the new environmentally controlled manufacturing area. Tis space will house eight injection molding machines for producing parts such as medical tubing connectors and components for an infrared thermometer. Once this project is completed, the next expansion phase includes a custom-built metrology laboratory with full environmental controls. “Tanks to the measurement solutions from Hexagon
Metrology, we have the confidence to continue to grow our business, especially in the Irish medical market,” concluded Faughnan.
This feature edited by Yearbook Editor Mike Anderson from information provided by Hexagon Metrology.
Medical Manufacturing 2014 85
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