We thought the Canweigh would be more accurate and more reliable than traditional fill level inspection systems. Compared to gamma systems, it would certainly be less of a headache from a regulatory point of view. And it had the capacity for our line."
The patented CM9400, which is unlike any other checkweigher on the market, is suitable for many production lines that traditionally have not been good candidates for checkweighing. The CM9400 is the only checkweigher in the world that handles a flow of containers seam-to-seam with no separation. Other checkweighers must separate containers to achieve isolated time on the weighpan by accelerating them prior to the weighpan and then decelerating them.
The CM9400 achieves high accuracy at high speeds while weighing seam-to-seam cans, bottles or jars with a weighpan that is virtually the same length as the container being weighed. This is accomplished by supporting the containers on two chains that are positioned near the outer edges of the container instead of the middle. Traditional checkweighers with chains in the middle perceive the length of the container to be its diameter. With chains near the edges, the container is supported on shorter lengths of chain, which enables the weighpan to perceive the length of the container to be essentially one-third of its diameter. This allows the CM9400 to achieve the necessary isolated time on the weighpan without acceleration and deceleration.
By eliminating acceleration common to other checkweighers, the CM9400 maximizes time-to-weigh, which contributes to good weigh accuracy. It also improves container handling and the reject system's ability to accurately remove out-of-tolerance packages. Furthermore, it reduces damage to containers and, for customers inspecting open containers after the filler, it reduces spillage.
Matt Brewing is using the CM9400 to inspect 12 oz and 16 oz cans of Saranac and Utica Club beers as well as private label and contract brewed beers. Changing over the checkweigher to handle a different size is fast and easy because there are no container-specific time-management components such as a feedscrew to change. "The Canweigh takes less than two minutes to change, including calibration," said Swanson. "Everything is done on the touchscreen."
"The CM9400 is very easy to use. Everything is right there on the screen - it's very visual," added Kuhr. The checkweigher features a 15-inch color display that offers at-a-glance production monitoring.