Doing metrology on production parts normally means disassembling them and putting them under the microscope or X-raying them, but sometimes there are problems that only manifest when the pen is assembled and closed. There's a lot of geometry that isn't visible externally in a pen, more so in certain markers. The writing systems are very sensitive to manufacturing tolerances, and out of spec parts are perceived by users as a bad pen or marker (which we don't want). With a normal X-ray, it is very difficult to resolve internal geometry deep in the assembled pen with any degree of accuracy.
CT scans allow us to examine internal geometry non-destructively and they are relatively fast to run. The scans shown in that blog post I would guess took about 6-8 hours of scanning + 1 hour of reconstruction to generate. Once you start the machine, it's completely automated from there, so you don't need a technician or an engineer sitting at the X-ray machine (which BTW is running Windows XP or something worse) takings images of parts.
Doing metrology on production parts normally means disassembling them and putting them under the microscope or X-raying them, but sometimes there are problems that only manifest when the pen is assembled and closed. There's a lot of geometry that isn't visible externally in a pen, more so in certain markers. The writing systems are very sensitive to manufacturing tolerances, and out of spec parts are perceived by users as a bad pen or marker (which we don't want). With a normal X-ray, it is very difficult to resolve internal geometry deep in the assembled pen with any degree of accuracy.
CT scans allow us to examine internal geometry non-destructively and they are relatively fast to run. The scans shown in that blog post I would guess took about 6-8 hours of scanning + 1 hour of reconstruction to generate. Once you start the machine, it's completely automated from there, so you don't need a technician or an engineer sitting at the X-ray machine (which BTW is running Windows XP or something worse) takings images of parts.