Inonyanya kushandiswa kugadzirazve squaring vhiri uye calibrating rollers, chengetedza mutengo wemidziyo yedhaimondi.
Zvikamu zvecalibration roller zvakagadzirirwa kucheka kwakatsetseka uye yakakwirira yekubvisa zvinhu. Zvikamu zvinotenderwa kwehupenyu hwavo hurefu hwekushanda, kuderera kwesimba rekushandisa, kuderera kweruzha rwekushanda, kunaka kwakanaka uye kuita kwakagadzikana.