Izifaki khodi zihumusha ukunyakaza kwe-rotary noma okuqondile kusignali yedijithali. Amasignali athunyelwa kusilawuli, esiqapha amapharamitha okunyakaza njengesivinini, isilinganiso, isiqondiso, ibanga, noma indawo. Kusukela ngo-2004, izifaki khodi ze-Gertech zifakwe ezidingweni eziningi zempendulo ezimbonini eziningi. Lapho ukhetha isifaki khodi esifanele sohlelo lwakho lokusebenza, kubalulekile ukuqonda indima yesifaki khodi kusistimu yakho yokulawula ukunyakaza. Ukusiza ngalokho, sihlanganise umtapo wezincwadi wezinhlelo zokusebenza ezijwayelekile ezihlukaniswe imboni ukuze sikusize uthole isifaki khodi esifanele sohlelo lwakho lokusebenza lokulawula ukunyakaza.