Ngoba umshini wokuphonsa oshisayo oshisayo usebenza ngokushisa okuphezulu, ingcindezi ephezulu kanye nesivinini esikhulu, izimo zokusebenza zinokhahlo, umjikelezo ungakwazi ukuqhubeka, i-opharetha kufanele ikwazi ukuqhubeka, i-opharetha kufanele ikwazi ukuqhubeka, i-opharetha kufanele ibonge kakhulu, yahlulela ngokucophelela, yahlulela indawo ye Ukwehluleka, nokuqeda ukwehluleka ngesikhathi sokuqinisekisa ukukhiqizwa okujwayelekile . Ngomshini ojwayelekile wokufa okulawulwa yi-PLC, ngoba kungekho phutha kanye nemibandela edingekayo ukuqeda iphutha; Ngomshini wokujikijeleka wokufa olawulwa yi-PC, ngenxa yokuzithokozisa okucebile kokuzitholela umsebenzi, okungukuthi, ukubheka nokuqapha kanye nomshini wokuqapha, uma kuhlobene nomshini oqaphelekile, uma kudinga ukubhekana nokuhlaziywa okuphelele ngesikhathi ukuthola imbangela futhi kuqedwe .
Amaphutha ajwayelekile womshini wokujikijelwa wokufa yile: Ukungasebenzi, akukho senzo, akukho phutha, iphutha lesenzo, nokho okusebenzayo kohlelo lokufa kanye nohlelo lokusebenza oluhlobene nesenzo ngasinye, inqubo yokusebenza yohlelo lwe-hydraulic yomshini wokudla okufa nokulungiswa kwe-hydraulic nokulungiswa Izindlela zokucindezela nejubane ziyisisekelo sokuxazulula inkinga
