The biggest problem of the mines and quarries is clogging of the raw material which contains high moisture and stickiness at the vibrating feeders and by-pass grizzly. It can be solved with wobbler feeders. With the help of the synchronized turning disked elliptical shafts which are self-cleaning, materials that are not wanted as fine materials, mud, and waste materials can be separated with the desired dimension. Apron feeders are generally used in front of the wobbler feeder.