An automatic vision inspection system to read the alphanumeric product identifi ers cast into pistons has been developed by Olmec-UK Ltd for an automotive engine manufacturer.

The pistons must be checked prior to engine testing to ensure that the correct ones are fi tted. The vision solution features the use of four individual cameras, each equipped with their own ringlights to image each of the pistons simultaneously. The system is controlled using Olmec’s VP2-CR system which features character recognition software that the company says takes into account different fonts, quality, scale, skew and slant of the characters.