Lub khob cij crumbs feeder yog ib txwm tso tawm los ntawm cov khoom siv hauv lub hopper, thiab tsim cov ntaub thaiv npog nrog cov khoom siv ntawm cov hlua mesh, uas yog sib npaug ntawm cov khoom.Lub voj voog yog tsim nyog thiab txhim khu kev qha, thiab cov crumbs thiab chaff tsis yooj yim tawg.Lub tshuab battering thiab sib sau tshuab txuas nrog kom paub txog kev khiav haujlwm.