Foda madara na iya cika layi shine layin samarwa da aka tsara musamman don cikawa da tattara foda madara a cikin gwangwani. Layin cika yawanci ya ƙunshi injuna da kayan aiki da yawa, kowanne yana da takamaiman aiki a cikin tsari.

Na'ura ta farko a cikin layin cikawa shine gwangwani depalletizer, wanda ke cire gwangwani mara kyau daga tari kuma aika su zuwa injin cikawa. Injin cikawa yana da alhakin cika gwangwani daidai gwangwani tare da adadin ƙwayar madara mai dacewa. Cikakkun gwangwani daga nan sai su matsa zuwa gwangwanin gwangwani, wanda ke rufe gwangwani kuma yana shirya su don ɗaukar kaya.

Bayan an kulle gwangwani, suna matsawa tare da bel ɗin jigilar kaya zuwa lakabi da injunan ƙididdigewa. Waɗannan injina suna amfani da tambari da lambobin kwanan wata zuwa gwangwani don dalilai na tantancewa. Daga nan sai a aika gwangwani zuwa ma'ajiyar ƙara, wanda ke haɗa gwangwani a cikin akwati ko kwali don jigilar kaya.

Baya ga waɗannan na'urori na farko, foda na madara na iya cika layin na iya haɗawa da wasu kayan aiki kamar kurkura, mai tara ƙura, mai gano ƙarfe, da tsarin kula da inganci don tabbatar da samfurin ya cika ka'idodin da ake buƙata.

Gabaɗaya, foda madara na iya cika layi shine muhimmin ɓangare na tsarin samarwa don samfuran foda madara, samar da sauri da ingantaccen hanyar cikawa da fakitin gwangwani don rarrabawa da siyarwa.