Uma i-gantry crane isetshenziswa, iyisisetshenziswa sokuvikela ukuphepha esingavimbela ngempumelelo ukugcwala ngokweqile. Ibizwa nangokuthi i-lift capacity limiter. Umsebenzi wayo wokuphepha ukumisa isenzo sokuphakamisa lapho umthwalo wokuphakamisa i-crane udlula inani elilinganiselwe, ngaleyo ndlela kugwenywe izingozi ezigcwala kakhulu. Izikhawuli zokulayisha ngokweqile zisetshenziswa kakhulu kuma-cranes ohlobo lwebhuloho nama-hoists. Abanyeuhlobo lwe-jib cranes(isb. ama-cranes ama-tower cranes, ama-gantry cranes) sebenzisa isinqamuli sokulayishwa ngokweqile ngokuhambisana nesikhawuli sesikhashana. Kunezinhlobo eziningi zemikhawulo yokulayishwa ngokweqile, eyemishini neye-elekthronikhi.
(1) Uhlobo lukamshini: Umdlali oshayayo ushayelwa isenzo samalever, ama-spring, amakhamera, njll. Uma kulayishwe kakhulu, umhlaseli usebenzisana neswishi elawula isenzo sokuphakamisa, enqamula umthombo wamandla wendlela yokuphakamisa, futhi elawula indlela yokuphakamisa ukuyeka ukugijima.
(2) Uhlobo lwe-elekthronikhi: Iqukethe izinzwa, ama-amplifiers okusebenza, ama-actuator okulawula kanye nezinkomba zomthwalo. Ihlanganisa imisebenzi yokuphepha efana nesibonisi, isilawuli kanye ne-alamu. Lapho i-crane iphakamisa umthwalo, inzwa engxenyeni ethwalayo iyawohloka, iguqule isisindo somthwalo sibe isignali kagesi, bese iyasikhulisa ukuze ibonise inani lomthwalo. Uma umthwalo udlula umthwalo olinganiselwe, umthombo wamandla wendlela yokuphakamisa uyanqanyulwa, ukuze isenzo sokuphakamisa umshini wokuphakamisa asikwazi ukwenzeka.
Ii-gantry craneisebenzisa isikhathi sokuphakamisa ukuze ibonise isimo somthwalo. Inani lesikhathi sokuphakamisa linqunywa umkhiqizo wesisindo sokuphakamisa kanye nobukhulu. Inani le-amplitude linqunywa umkhiqizo wobude bengalo ye-crane boom kanye ne-cosine ye-engeli yokukhetha. Ukuthi i-crane ilayishwe ngokweqile empeleni kukhawulwe umthamo wokuphakamisa, ubude be-boom kanye ne-boom inclination angle. Ngesikhathi esifanayo, imingcele eminingi efana nezimo zokusebenza nayo kufanele icatshangelwe, okwenza ukulawula kube nzima kakhulu.
I-microcomputer esetshenziswa kabanzi elawulwa yi-torque limiter ingahlanganisa izimo ezihlukahlukene futhi ixazulule le nkinga kangcono. Umkhawulo we-torque uqukethe umtshina wokulayisha, umtshina wobude bengalo, umtshina wama-engeli, isikhethi sesimo sokusebenza kanye nekhompyutha encane. Uma i-crane ingena esimweni sokusebenza, amasignali okuthola ipharamitha ngayinye yesimo sangempela sokusebenza afakwa kukhompyutha. Ngemva kokubala, ukukhulisa nokucubungula, kuqhathaniswa nenani elilinganiselwe lokuphakamisa elilinganiselwe ngaphambili, futhi amanani angempela ahambisanayo ayaboniswa esibonisini. . Uma inani langempela lifinyelela ku-90% yenani elilinganiselwe, lizothumela isignali yesixwayiso sangaphambi kwesikhathi. Uma inani langempela lidlula umthwalo olinganiselwe, isignali ye-alamu izokhishwa, futhi i-crane izoyeka ukusebenza endaweni eyingozi (ukuphakamisa, ukunweba ingalo, ukwehlisa ingalo, nokuzungezisa).
