Njira zitatu za stencil za PCB

Stencil yachitsulo ya PCBakhoza kugawidwa m'magulu otsatirawa malinga ndi ndondomeko:

1. Stencil ya solder: Monga momwe dzina limanenera, imagwiritsidwa ntchito popaka phala la solder. Dulani mabowo muzitsulo zomwe zimagwirizana ndi mapepala pa bolodi la PCB. Kenako gwiritsani ntchito solder phala kuti musindikize pa bolodi la PCB kudzera pa stencil. Mukasindikiza phala la solder, ikani phala la solder pamwamba pa stencil, ndikuyika bolodi pansi pa stencil. Kenaka gwiritsani ntchito scraper kuti mufufuze phala la solder mofanana pamabowo a stencil (phala la solder lidzatuluka mu stencil ikafinyidwa) yenda pansi pa mauna ndikuphimba bolodi la dera). Gwirizanitsani zigawo za SMD ndikuzibwezeretsanso palimodzi, ndipo zida za plug-in zimawotchedwa pamanja.

2. Stencil yachitsulo yofiira yapulasitiki: Bowo limatsegulidwa pakati pa mapepala awiri a chigawocho malinga ndi kukula ndi mtundu wa gawolo. Gwiritsani ntchito kugawira (kutulutsa ndiko kugwiritsa ntchito mpweya woponderezedwa kuloza guluu wofiira pagawolo kudzera pamutu wapadera woperekera) kuti muyike guluu wofiira pa bolodi la PCB kudzera mu mesh yachitsulo. Kenako ikani zigawozi, ndipo pambuyo zigawo mwamphamvu Ufumuyo PCB, pulagi mu zigawo zikuluzikulu pulagi ndi kudutsa yoweyula soldering.

3. Stencil yapawiri: Pamene bolodi la PCB likufunika kupakidwa utoto wa solder ndi guluu wofiira, ndiye kuti cholembera chapawiri chiyenera kugwiritsidwa ntchito. Wapawiri ndondomeko zitsulo mauna tichipeza awiri zitsulo mauna, wamba laser zitsulo mauna ndi makwerero zitsulo mauna. Momwe mungadziwire ngati mugwiritse ntchito stencil ya makwerero popangira phala kapena makwerero a guluu wofiira? Choyamba mvetsetsani ngati mugwiritse ntchito phala la solder kapena guluu wofiira poyamba. Ngati phala la solder ligwiritsidwa ntchito poyamba, ndiye kuti cholembera cha solder chidzapangidwa kukhala cholembera wamba cha laser, ndipo cholembera chofiira chidzapangidwa kukhala stencil ya makwerero. Mukayika guluu wofiira poyamba, ndiye kuti stencil yofiira imapangidwa kukhala cholembera wamba cha laser, ndipo cholembera cha solder chidzapangidwa kukhala stencil ya makwerero.

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