2D Code On Cast Surfaces
Marking on cast surfaces is a challenge. The roughness of the cast surface will "hide" regular alpha characters. Standard Dot-Peen 2D codes become impossible to read as the single dots for each cell blend into the cast surface background. CMT's Square-Dot® is a patented high resolution marking process to apply 2D/UID machine readable codes to a variety of materials. This process scribes a matrix of small square cells into the material. The mark provides the best direct part reading with a vision system as the cells are filled in similar to a laser mark but much deeper and often with better contrast.
The following is a study of Square-Dot® 2D marks into a range of cast surfaces. Cast surfaces are measured by AA (English) and Ra (Metric). Each cast surface rating is provided in English and Metric units. The first five 2D matrix marks and 3/8" x 3/8" square. The last two 2D matrix marks, in the roughest surfaces, are 1/2" x 1/2" square. On the Left is a picture of the mark on the right is the camera reading.
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