Noma yikuphi ukuphazamiseka phakathi kwephinikhodi yokuma yeswishi yokuthinta ukukhanya kanye nembobo yendawo ye-PCB kuzothinta inqubo yayo yokukhweza ye-SMT.Uma ukulingana kokubekezelelana kubalulekile, kuzoba nengozi ethile yokucindezeleka komshini.Ngokuhlaziywa kokunqwabelana kokubekezelela kwephinikhodi yokuma yeswishi yokuthinta ukukhanya kanye nembobo yokubeka ye-PCB, imvume encane phakathi kwephinikhodi yokumisa kanye nembobo yokumisa ibalwa. ukuze kube -0.063mm, okungukuthi, kukhona ukuphazamiseka okuncane.Ngakho-ke, kunobungozi bokuthi iphinikhodi yokuma yeswishi yokuthinta ukukhanya ayikwazi ukufakwa embotsheni yokumisa ye-PCB ngesikhathi sokukhwezwa kwe-SMT.Izimo ezimbi kakhulu zingatholwa ngokuhlola okubonakalayo ngaphambi kokuphinda kufakwe i-solder.Ukukhubazeka okuncane kuzoshiyelwa kunqubo elandelayo futhi kuzodala ukucindezeleka kwemishini.Ngokusho kokuhlaziywa kwe-Root Square Sum, izinga elingalungile lalingu-7153PPM. 
Kunconywa ukuthi ushintshe usayizi nokubekezelela imbobo ye-PCB yokubeka isuka ku-0.7mm +/ -0.05mm iye ku-0.8mm+/ -0.05mm.Ukuhlaziywa kokuqoqwa kokubekezelelana kuyenziwa futhi kuhlelo olulungiselelwe.Imiphumela ibonisa ukuthi imvume encane phakathi kwekholomu yokumisa kanye nembobo yokumisa ingu-+0.037mm, futhi ingozi yokuphazamiseka iyaqedwa.
Isikhathi sokuthumela: Aug-18-2021
