Thayer Scale offers a complete line of low capacity Weigh Belt feeders designed to operate accurately and reliably in harsh industrial environments with minimal maintenance. The "MXL" Weigh belts are specifically designed to meter a wide variety of hard-to-handle materials, such as potato chips and cotton fiber. Weighing is done through Thayer''s patented low deflection, non-wearing FMSS (Force Measurement Suspension System) flexure scale which measures vertical loading and can take high load directed overloads (1000 percent). The FMSS Scale design uses counterweights to negate the tare weight of the weigh idler and the belt. Thayer''s automatic test weight mechanism provides a means for automatically applying a known test weight and going through a calibration sequence on push button demand to check scale calibration. A "foolproof" self-checking software algorithm in the feeder control instrumentation prevents erroneous calibration.