of precision was unheard of 10 years ago. OGP offers their SmartScope Specialist 300 for the medical field. It features an array of sensor options including telecentric zoom optics, touch probe, TeleStar telecentric interferometric TTL laser, microprobes, rotary tables, and continuous-contact scanning probe. Accuracy is down to 1.5 + 5L/1000 µm, to the ISO 10360 standard.
field,” says Murray, even though the SNAP is a general-pur- pose machine. “SNAP features AutoCorrelate, recognizing the part it measures regardless of the orientation. Tis reduces [or eliminates] the need for special jigs or fixtures to hold parts,” says Murray. Long-term use of data is another trend in medical. “We are well past the point where we look at measurement data,
“Many aerospace manufacturers have added medical because there are many similarities between the two industries.”
Another device useful on the shop floor that OGP recently
introduced is its SNAP digital measuring system. Shop-hard- ened, it has no moving parts and quickly measures in 2-D to an accuracy of 5 + L/150 µm, to the ISO 10360 standard. “We felt the ergonomics of how to use measuring equipment is be- coming more important, which is certainly true in the medical
say the part is good, and then discard the metrology data. All of the data, good or bad, is being fed back into some kind of process-control loop,” said Nate Rose, Applications Engi- neering Manager at OGP. Tis oſten includes comparing the data to the part’s CAD model to determine how well the part complies with the design intent.
Graphical output of measurement data shows the magnitude and direction of measured deviations from the nominal form. Metrology measurements of medical devices used for long-term process control is just as important as quality control on individual parts.