In a dispenser, particularly an atomizer, which is used for flowable substances, particularly pharmaceuticals, use is made of a pump, which must be actuated one or more times for priming purposes. The method allows for searching in a database of historical fault log data from a plurality of machines for the occurrence of respective fault patterns indicative of incipient failures of a respective machine subsystem. Detectors sense an output of the light from the fibers. Subsidiary pedal links connect the pedals to the center frame, a resistance pulley is provided in the center frame, and a crank having crank arms is coupled to the resistance pulley. In general, various embodiments of the invention involve providing an expanded data set by adding shadow data to a historical bid data set that allows a logistic regression approach to mathematically calculate the coefficient for price sensitivity with greater accuracy. The infeed extension may be adjusted relative to the work surface of the saw.