When higher accuracy is required in measuring weight using conveyor belt scales, weigh belt feeders, and loss-in-weight feeders, the Force Measurement Suspension System (FMSS) has proven effective in high-speed, high-volume to low-density, low rate applications where control quality and productivity are critical (photo). The FMSS is the arrangement of active mechanical elements interposed between the load receptor, such as a platform, hopper or belt, and the load cell. In this way, the FMSS functions as a force-vector filter that permits the sum of the chosen unidirectional force components (material weight) to pass through the system to the load cell while blocking out all other nuisance, erroneous or destructive force-vector components. By providing mass counterbalance of tare weight, the FMSS is said to create a superior signal-to-noise ratio in weight sensing that allows for precise realtime measurements that are not possible with standard scales: allowing for accurate weighing at speeds in excess of 500–600 ft/min, in conveyor-belt-scale applications. The FMSS is available in a number of capacity ranges and configurations to suit the particular needs of continuous weighing and feeding equipment. — Thayer Scale-Hyer Industries, Inc., Pembroke, Mass.
High accuracies in weighing and feeding
| By Chemical Engineering
Rebekkah Marshall