Laser technology is expanding in construction, helping bulldozer operators smooth sites. Caterpillar Inc. (www.cat.com) is now offering the AccuGrade laser system, which can guide dozers to create surfaces that have only a 6 mm deviation. Once a transmitting laser is set to the desired elevation, it sends signals to masts mounted on the dozer blade. That input is sent to the controller module, which directs the hydraulic system that moves the blade.
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