Umbhobho wentsimbi yomthungo othe tye oqhubekayo, inkqubo yokuqengqeleka eqhubekayo isetyenziswa kwinkqubo yokuqengqeleka eqhubekayo kunye nokunciphisa ububanzi bombhobho wentsimbi.Ukuqengqeleka kombhobho wentsimbi eqhubekayo yinkqubo apho umbhobho wentsimbi kunye nentonga engundoqo ihamba kunye kwiindawo ezininzi zokumisa.I-deformation kunye nokuhamba kombhobho wensimbi kuchaphazeleka ngaxeshanye ngumqulu kunye nentonga engundoqo.

I mandrel inokuba free-ezidadayo, oko kukuthi, iqhutywa ngentsimbi ukuya phambili;nayo inokulinganiselwa, oko kukuthi, ukunika mandrel isantya intshukumo ukunciphisa intshukumo yayo free.Ngexesha lokuhamba, i-mandrel, i-roll kunye nentsimbi yombhobho idityaniswe ngokupheleleyo, kwaye nayiphi na enye yeenguqu kwikhonkco iya kubangela ukuba imeko yenkqubo yonke itshintshe.Ithiyori yokuqengqeleka ngokuqhubekayo kukufunda ubudlelwane phakathi kwabo.