Chophimba ng'oma, monga chida chachikulu chosankhira malo osungira zinyalala, ndi chimodzi mwazinthu zofunika kwambiri pazida zokonzera zinyalala.
Choyamba chimagwiritsidwa ntchito mu mzere wolekanitsa zinyalala. Sefa yozungulira imagwiritsidwa ntchito kupanga zinyalala pogwiritsa ntchito granularity
Zipangizo zokonzera makina zosankhidwa bwino. Pamwamba ponse pa roller pali mabowo amitundu yosiyanasiyana. Thupi la sikirini limayikidwa mopingasa, ndipo zinthuzo zimalowa mu roller.
Kuzungulira kosavuta ndi kuzungulira mkati kumapangitsa kuzungulira kozungulira, zinyalala zokhala ndi tinthu tating'onoting'ono tochepa kuposa dzenje la sefa zimasefedwa mu sefa ya pansi, ndipo zimakhalabe m'thupi la sefa.
Zinthu zomwe zili mkati mwake zimakhala sefa ndipo zimatuluka pansi pa mpukutuwo.