Igwe nkwụchi ngagharị okirikiri dị okirikiri nwere voltaji 12V na 24V.
Emebere 12V/24V a na-akwụsị ngagharị yarn break sensọ maka igwe eji akpa okirikiri iji chọpụta nkwụsịtụ mberede na yarn akwa na igwe akwa okirikiri.Ihe mmetụta nkwụsịtụ nkwụsịtụ a nwere eriri anya, ihe infrared (IR) ọkụ na-emitting diode (LED) na ihe nchọpụta fotoelectric.Ọ na-achọpụta mgbe otu eriri yarn na-agbaji, na-akwụsị okirikiri nke ịkpa akwa ma na-enyere aka igbochi mmebi nke yarn ahụ.
Ọ dị mfe ịwụnye ma jiri ya mee ihe, ọ dịkwa mma maka ọtụtụ yarn knitting.