Ithini inkcazo ye- PCB inkqubo? Okulandelayo, ndiza kuchaza inkcazo yenkqubo ye-PCB. Eli nqaku liza kuchaza inkqubo yokuvelisa ye-PCB kunye neemfuno zabenzi. Kuxhomekeke kwimfundo okanye kwizithintelo zomvelisi, zinokudityaniswa zibe phantsi kwecandelo elibizwa ngokuba “ziinkqubo”. Ezi ndidi zimiselwe ikakhulu kwisiseko seendleko. Iphakamileyo inqanaba lenkqubo, kokuphakama iindleko. Iindidi zenkqubo zinceda abayili balawule iindleko ngokunciphisa umda kuyilo.

La macandelo alandelayo achaza umahluko phakathi kweenkqubo ezahlukeneyo, achaze iingxaki zokuvelisa, kwaye angene kwiinkcukacha malunga nenkqubo nganye, ngakumbi inkqubo yesiko kunye nendlela umyili abhala ngayo amanqaku okuvelisa kunye nemiyalelo yenyathelo ngalinye.

Amanqaku okuvelisa ayila ingqokelela yamanqaku asekwe kwisicatshulwa aqhotyoshelwe kwifayile yedatha ye-PCB (njengefayile yeGerber okanye enye ifayile yedatha), okanye anokubonelelwa ngumzobo wePCB ngokwawo, onxibelelana neemfuno zomyili kunye neenkcukacha inkqubo yokuvelisa. Ukwenza amagqabantshintshi yenye yezona ndawo zinomdla kwaye zididayo kwinkqubo ye-PCB. Uninzi lwabaqulunqi abayazi indlela yokuchonga la magqabantshintshi okanye ukuba zichonge ntoni. Oku kwenziwa nzima ngakumbi ngamandla ahlukeneyo abavelisi kunye nokusilela kwezikhokelo ezifanelekileyo. Umyili kufuneka abuze imibuzo eliqela kwaye aqonde inkqubo yokuvelisa ngaphambi kokuyalela umenzi ukuba avelise njani.

Ke kutheni uphawula? Amagqabantshintshi enziwe ukuba angathinteli abavelisi kodwa abonelele ngokungaguquguquki kunye nenqaku lokuqala elibalulekileyo xa uzama ukulungelelanisa amaxabiso athile. Amaxabiso akhankanyiweyo kweli phepha asekwe kwiinkqubo eziqhelekileyo.

Ke yintoni ubugcisa? Ubugcisa lulwazi lwendlela yokwenza, ukwenza, okanye ukwenza iinjongo ezithile okanye umsebenzi. Kuyilo lwe-PCB, inkqubo yekota ayibhekiseli kuphela kudidi lwenkqubo yedatha, kodwa nakwizakhono zomenzi. Ezi datha zisekwe ekusebenzeni kwezixhobo zomvelisi kunye nenkqubo yoyilo iyonke.

Amanqaku amathathu olawulo yi-etCH, Drill kunye nobhaliso. Ezinye iipropathi zichaphazela inkqubo yonke, kodwa la manqaku mathathu abaluleke kakhulu.

Ngaphambili, kwakungekho mithetho icacileyo yezi nkqubo. Ngenxa yokoyika ukuqhuba abathengi kude okanye ukuveza ulwazi oluninzi kakhulu kubantu okhuphisana nabo, abavelisi bebengenamdla wokuphuhlisa ezo nkqubo, kwaye kwakungekho mbutho okanye qela lirekhodayo kwaye liququzelele idatha. Ke ngoko, ngokuphuhliswa kweshishini le-PCB, ngokuthe ngcembe kwasekwa inkqubo yodweliso lwenkqubo, yahlulahlulwe yangamacandelo amane enkqubo: aqhelekileyo, ahamba phambili kwaye aphambili. Njengoko inkqubo iphuculwe, idatha ihlala ihlaziywa, ke inkqubo yenkqubo iyatshintsha. Iindidi zeenkqubo kunye neenkcazo zazo eziqhelekileyo zezi zilandelayo:

Elona nqanaba lisezantsi nelona liqhelekileyo lenkqubo ye -—– inkqubo ichazwa ngokubanzi njenge-0.006 kwi. / 0.006 kwi. (6 / 6mil) yocingo / isithuba esisezantsi, i-0.012 ngaphakathi. (0.3048cm) umngxuma omncinci ogrunjiweyo, kwaye ubuninzi be-8- I-10 ye-PCB maleko, ngaphandle kokuba kusetyenziswa ifoyile ye-0.5 yefoyile yobhedu.

Inkqubo eqhubekekileyo- inqanaba 2 lenkqubo, enomda wenkqubo we-5 / 5mil, ubuncinci be-0.008 ngaphakathi. (0.2032com) umngxunya owombileyo, kunye nobuninzi beengqokelela zePCB ezili-15-20.

Inkqubo ekhokelayo—— lelona nqanaba liphezulu lemveliso esetyenziswa ngokuxhaphakileyo, kunye nemida yenkqubo emalunga ne-2 / 2mil, ubuncinci bomda wokugqiba umngxunya we-0.006 kwi. (0.1524cm), kunye nenani eliphezulu le-PCB ye-25-30.

Ezona nkqubo zihambele phambili ——– azichazwanga ngokucacileyo kuba iinkqubo ezikulo mgangatho zihlala ziguquka kwaye idatha yazo iya kutshintsha ekuhambeni kwexesha kwaye ifuna uhlengahlengiso rhoqo. (Qaphela: uninzi lweenkcukacha ngokubanzi kwiinkqubo kumzi mveliso zisekwe kwinkqubo yesiqhelo kusetyenziswa i-0.5 oz yefoyile yokuqala yobhedu.)