The programmable logic controller (PLC) is custom designed to meet customer''s unique processes, which can include varying batches, multiple feeders and other requirements. Complex processes are streamlined with pre-programmed routines, reducing operator time and risk of error in calculating batch needs. The feeder can be configured for volumetric or gravimetric delivery of dry bulk materials. The feeder utilizes mechanically actuated paddles to assure optimum product inflow crucial to consistent, repeatable feed screw performance. According to the manufacturer, this method not only prevents the formation of stable arches over the feed screw but also prevents degradation of friable product and segregation of blended product.