Ngomshini wokuphakela onembile, umshini omusha wokugqwala oklanyelwe wona uphakela iphepha ngokuzenzakalelayo nangokuqhubekayo, oqinisekisa ukuhanjiswa okubushelelezi kwephepha losayizi abahlukene. Ngaphandle kwalokho, lo mshini unikezwa umshini wokuthola amaphepha amabili. Ngetafula lesitoko, iyunithi yokondla iphepha ingangeza iphepha ngaphandle kokumisa umshini, okuqinisekisa ukukhiqizwa okuqhubekayo.