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The challenge was to gauge the diameters of critical holes (orifices) in cylindrical parts as it was rotated. The tolerances were as low as 0.0002″.

The solution was a system utilizing a vision inspection system triggered by a micro PLC. The micro PLC also operated the motor rotating the part and verified that the proper number of good holes were detected in each part.  In tight tolerance parts a special inside-out illumination system was devised that provided a lighted plates tip inside the cylindrical part. This provide the consistent lighting required to reach such tight tolerances.