Ngaphambi kokuhlola umshini, umgadi womshini ohlangothini lwe-chip kufanele uvulwe kuqala, futhi i-1 kg yamafutha egiya kufanele ingezwe ku-reducer, (ukhohlwa ukufuya kulula ukubiwa) bese unogada kufanele afakwe.
Ukulungiselela okubonakalayo okungavuthiwe: Ukukhethwa kwezinto zokwakha ezivuthiwe kuyadingeka, okokuqala, izinto zokusetshenziswa zidinga ukukhethwa kwezinkuni ezinzima ezixubile, izinto ezingavuthiwe kumele zifane, izingodo ezijwayelekile noma izinkuni zesikwele. Inani lokucubungula lezinto ezisetshenziswayo lingu-3-10mm. Ayikwazi ukusebenzisa ama-deformed (curvature makhulu kakhulu), kukhona ama-knobs, ama-nodule, aqukethe izipikili zensimbi, ububanzi obungalingani nobukhulu bokhuni. Gwema ukuvikela izinkuni ukuthi ziphumelele ngaphandle, ziqhekeze noma zibhidlize ibala ngesikhathi sokondla.
