Pogwiritsa ntchito servo linear drive, kutalika kwa filimu yolowera kudzera pazenera logwira. Ndi mpeni wozungulira, filimuyo imatha kudulidwa yokha. Mzere wa sawtooth ukhoza kukanikiza yokha ndikudulanso pakamwa pa filimuyo (monga bokosi la minofu ya nkhope). Pogwiritsa ntchito silinda yoyamwa kuti mugwire filimu yodulidwayo pamalo opanda kanthu, ndipo malo a filimuyo akhoza kusinthidwa popanda kuyima.