{"id":5840,"date":"2026-03-18T09:09:58","date_gmt":"2026-03-18T09:09:58","guid":{"rendered":"https:\/\/pickandplacemachine.com\/?p=5840"},"modified":"2026-05-19T15:45:14","modified_gmt":"2026-05-19T15:45:14","slug":"electrical-opens-and-shorts-placement-related-failure-mechanisms","status":"publish","type":"post","link":"https:\/\/pickandplacemachine.com\/tr\/electrical-opens-and-shorts-placement-related-failure-mechanisms\/","title":{"rendered":"Elektriksel A\u00e7\u0131kl\u0131klar ve \u015eortlar: Yerle\u015fimle \u0130lgili Ar\u0131za Mekanizmalar\u0131"},"content":{"rendered":"

\u00c7o\u011fu fabrika, kartlar ICT'de d\u00fc\u015fmeye ba\u015flad\u0131\u011f\u0131nda hala f\u0131r\u0131n\u0131 i\u015faret ediyor ve a\u00e7\u0131k\u00e7as\u0131 bu al\u0131\u015fkanl\u0131\u011f\u0131n, k\u00f6k neden k\u00fclt\u00fcr\u00fcn\u00fcn ne kadar tembel hale geldi\u011finden \u00e7ok, yeniden ak\u0131tman\u0131n kendisiyle ilgili oldu\u011funa inan\u0131yorum, \u00e7\u00fcnk\u00fc kart genellikle daha \u00f6nce yaraland\u0131 - bask\u0131 s\u0131ras\u0131nda, toplama s\u0131ras\u0131nda, yerle\u015ftirme s\u0131ras\u0131nda, herkesin sorgulamay\u0131 b\u0131rakt\u0131\u011f\u0131 s\u00f6zde rutin hareket s\u0131ras\u0131nda. \u0130nsanlar bu k\u0131sm\u0131 atl\u0131yor.<\/p>\n\n\n\n

K\u0131sa versiyon mu? Yanl\u0131\u015f \u015f\u00fcpheli.<\/p>\n\n\n\n

Ekiplerin parlak lehim ba\u011flant\u0131lar\u0131na bak\u0131p termal profiller \u00fczerinde tart\u0131\u015f\u0131rken, as\u0131l karma\u015fan\u0131n ak\u0131\u015f yukar\u0131s\u0131nda a\u00e7\u0131k bir \u015fekilde durdu\u011funu g\u00f6rd\u00fcm: s\u00fcr\u00fcklenen merkez verileri, kimsenin kaydetmek istemedi\u011fi noz\u00fcl a\u015f\u0131nmas\u0131, su\u00e7lamadan ka\u00e7mak i\u00e7in yeterince \u00f6zensiz besleyici indeksleme ve \u201cyeterince yak\u0131n\u201d gibi inen bile\u015fenler, ki bu, verimi k\u00f6t\u00fc macundan daha h\u0131zl\u0131 mahveden bir ifadedir. B\u00f6yle \u015feyler olur. Hem de \u00e7ok.<\/p>\n\n\n\n

NASA'n\u0131n y\u00fczey montaj i\u015f\u00e7ilik standard\u0131 e\u011fim, \u00e7\u0131k\u0131nt\u0131, macun k\u00f6pr\u00fcleme veya yanl\u0131\u015f hizalamay\u0131 dekorasyon s\u0131n\u0131f\u0131 kusurlar olarak ele almaz. Bunlar\u0131 reddetme ko\u015fullar\u0131 olarak ele al\u0131r. Bu b\u00fcrokratik bir a\u015f\u0131r\u0131l\u0131k de\u011fil. Tecr\u00fcbe konu\u015fuyor. Geometri bir kez yana do\u011fru gitti\u011finde, elektriksel davran\u0131\u015f genellikle onu takip eder. (s3vi.ndc.nasa.gov<\/a>)<\/p>\n\n\n\n

Ve i\u015fte \u00e7irkin ger\u00e7ek: m\u00fchendisler \u201clehim hatas\u0131\u201d dediklerinde, genellikle \u201cger\u00e7ek mekanizmay\u0131 hen\u00fcz izole edemedim\u201d demek isterler.\u201d<\/p>\n\n\n\n

A\u00e7\u0131k devre, k\u0131sa devrenin tam tersi de\u011fildir. \u0130nsanlar bu \u015fekilde konu\u015fuyor, elbette, ancak ar\u0131za fizi\u011fi yeterince farkl\u0131d\u0131r, bu y\u00fczden onlar\u0131 bir araya getirmek genellikle soru\u015fturmay\u0131 buland\u0131r\u0131r. A\u00e7\u0131klar genellikle a\u00e7l\u0131k sorunlar\u0131d\u0131r - yetersiz ger\u00e7ek temas alan\u0131, zay\u0131f \u0131slatma, kald\u0131r\u0131lm\u0131\u015f sonland\u0131rmalar, zay\u0131f e\u015f d\u00fczlemlilik, mikroskobik ba\u015flayan ve daha sonra pahal\u0131 olmaya karar veren bir \u00e7atlak. Di\u011fer yandan \u015fortlar kalabal\u0131k problemleridir. Aral\u0131\u011f\u0131n zaten dar oldu\u011fu yerlerde \u00e7ok fazla lehim. Rotasyon kaymas\u0131. Kur\u015fun e\u011frili\u011fi. Yay\u0131lmamas\u0131 gereken yerde macun. Ayn\u0131 kart. Farkl\u0131 ba\u015far\u0131s\u0131zl\u0131k ekonomisi. (s3vi.ndc.nasa.gov<\/a>)<\/p>\n\n\n\n

\u00dc\u00e7 kelime. Yerle\u015ftirme daha \u00f6nemlidir.<\/p>\n\n\n\n

Ancak pek \u00e7ok \u00fcretim m\u00fcd\u00fcr\u00fc hala bu arg\u00fcmana direniyor, \u00e7\u00fcnk\u00fc \u00e7o\u011funlukla yerle\u015ftirmeyle ilgili hatalar can s\u0131k\u0131c\u0131. Kendilerini her zaman dramatik bir \u015fekilde duyurmazlar. Sinsice yakla\u015f\u0131rlar. Bir diren\u00e7 merkezden biraz uzakta durabilir ve yine de kullan\u0131labilir g\u00f6r\u00fcnebilir. Bir QFP bir sa\u00e7 teli kadar d\u00f6nebilir, yeniden ak\u0131t\u0131labilir, zay\u0131f bir AOI kural\u0131n\u0131 ge\u00e7ebilir ve haftalar sonra titre\u015fim veya termal d\u00f6ng\u00fc alt\u0131nda ba\u015far\u0131s\u0131z olabilir. Bir paket hafif bir e\u011fimle inebilir, \u201ciyi\u201d lehimlenebilir, g\u00f6nderilebilir ve ard\u0131ndan saatlerce hata ay\u0131klama s\u00fcresi boyunca yanan aral\u0131kl\u0131 bir hayalet hata olarak geri gelebilir. Bu, teknisyenlerin tezgah ba\u015f\u0131nda k\u00fcfretmesine neden olan t\u00fcrden bir hatad\u0131r.<\/p>\n\n\n\n

Tecr\u00fcbelerime g\u00f6re, bir kez bakmaya ba\u015flad\u0131\u011f\u0131n\u0131zda s\u00fcre\u00e7 kali\u0307te kontrolleri\u0307<\/a><\/strong> sadece son serpinti yerine, model h\u0131zl\u0131 bir \u015fekilde belirginle\u015fir. Zarif de\u011fil. Teorik de\u011fil. Sadece bariz.<\/p>\n\n\n\n

Ve hay\u0131r, bir kez \u00e7al\u0131\u015ft\u0131rmak eklemin sa\u011fl\u0131kl\u0131 oldu\u011fu anlam\u0131na gelmez. Eklemin bir kez \u00e7al\u0131\u015ft\u0131\u011f\u0131 anlam\u0131na gelir.<\/p>\n\n\n\n

PMC ar\u015fivindeki bir 2024 incelemesi, daha b\u00fcy\u00fck bir noktay\u0131 olduk\u00e7a net bir \u015fekilde ortaya koydu: paket ve lehim ba\u011flant\u0131 g\u00fcvenilirli\u011fi, termal d\u00f6ng\u00fc ve mekanik stresin s\u00fcrekli bask\u0131s\u0131 alt\u0131ndad\u0131r ve bu stresler, bir ba\u011flant\u0131n\u0131n yaln\u0131zca ilk g\u00fcn kabul edilebilir g\u00f6r\u00fcn\u00fcp g\u00f6r\u00fcnmedi\u011fini umursamaz. Bile\u015fen merkezin d\u0131\u015f\u0131na d\u00fc\u015fm\u00fc\u015fse, gerilim da\u011f\u0131l\u0131m\u0131 dengesizse, lehim aray\u00fcz\u00fc marjinal bir \u015fekilde hayata ba\u015flam\u0131\u015fsa, saha ko\u015fullar\u0131 i\u015fi bitirir. Nakliye \u015foku yard\u0131mc\u0131 olur. Titre\u015fim de \u00f6yle. Is\u0131 da \u00f6yle. Amac\u0131n\u0131z a\u011fr\u0131y\u0131 garanti alt\u0131na almaksa, asl\u0131nda g\u00fczel bir kombinasyon. \u0130\u015fte bu y\u00fczden daha g\u00fc\u00e7l\u00fc SMT denetim sistemleri<\/a><\/strong> s\u00fcsl\u00fc fabrikalar i\u00e7in l\u00fcks bir eklenti de\u011fildir; ciddi hatlar\u0131n kendilerini kand\u0131rmay\u0131 b\u0131rakma \u015feklidir. (s3vi.ndc.nasa.gov<\/a>)<\/p>\n\n\n\n

Hat genellikle kusur raporunun s\u00f6yledi\u011finden daha fazlas\u0131n\u0131 bilir<\/h2>\n\n\n\n

Yine de \u00e7o\u011fu kusur raporu garip bir \u015fekilde sterilize edilmi\u015ftir. \u201cU14\u201dte a\u00e7\u0131k.\u201c \u201dJ3\u201cte k\u0131sa devre.\u201d \"Yeniden ak\u0131\u015f endi\u015fesi.\" G\u00fczel. Ama ger\u00e7ekte ne oldu?<\/p>\n\n\n\n

A\u00e7\u0131lmalar g\u00f6rd\u00fc\u011f\u00fcmde i\u015fe f\u0131r\u0131nla ba\u015flamam. Y\u00f6netim toplant\u0131lar\u0131nda kimsenin tart\u0131\u015fmaktan ho\u015flanmad\u0131\u011f\u0131 \u00e7irkin, s\u0131k\u0131c\u0131 \u015f\u00fcphelilerle ba\u015flar\u0131m: a\u015f\u0131nm\u0131\u015f nozul u\u00e7lar\u0131, besleyici hatvesi sapmas\u0131, bayat paket k\u00fct\u00fcphaneleri, k\u00f6t\u00fc Z-y\u00fcksekli\u011fi davran\u0131\u015f\u0131, e\u011frilmi\u015f levhalar, zay\u0131f destek tak\u0131mlar\u0131, berbat e\u015f d\u00fczlemli sonland\u0131rmalar. Bunlar ger\u00e7ek at\u00f6lye listesi. Seksi de\u011fil. \u00c7ok ger\u00e7ek.<\/p>\n\n\n\n

\u015eortlar beni farkl\u0131 bir y\u00f6ne \u00e7ekiyor. T\u0131kan\u0131kl\u0131k aramaya ba\u015fl\u0131yorum - ince aral\u0131kl\u0131 u\u00e7lar, rotasyon ofseti, macun yay\u0131lmas\u0131, dengesiz aral\u0131k pencereleri, biraz fazla agresif yerle\u015ftirme kuvveti, olmas\u0131 gereken yerde olmayan destek pimleri, hatta belki de yerle\u015ftirme d\u00f6ng\u00fcs\u00fc s\u0131ras\u0131nda kart esnemesi. Ve evet, lehim k\u00f6pr\u00fcleme kesinlikle yeniden ak\u0131tmadan \u00f6nce \u201cdo\u011fabilir\u201d. NASA'n\u0131n SMT kriterleri, lehim pastas\u0131 k\u00f6pr\u00fclemesi ve a\u00e7\u0131k aral\u0131\u011fa giren macun yanl\u0131\u015f hizalamas\u0131 konusunda a\u00e7\u0131kt\u0131r. Bu dili e\u011flenmek i\u00e7in yazmad\u0131lar. (s3vi.ndc.nasa.gov<\/a>)<\/p>\n\n\n\n

Bu y\u00fczden birisi \u201cF\u0131r\u0131n neden oldu\u201d dedi\u011finde ilk tepkim genellikle \u015fu oluyor: Belki. Ama muhtemelen tek ba\u015f\u0131na de\u011fil.<\/p>\n\n\n\n

\"SMT<\/a><\/figure>\n\n\n\n

Olgun fabrikalar tek bir kontrol noktas\u0131na g\u00fcvenmez<\/h2>\n\n\n\n

\u0130\u015fte bu noktada odadaki yeti\u015fkinler kendilerini turistlerden ay\u0131rmaya ba\u015fl\u0131yor.<\/p>\n\n\n\n

Helios, 2024 y\u0131ll\u0131k ba\u015fvurusunda, 3D lehim pastas\u0131 denetimi, 3D AOI, X-ray denetimi, i\u015flevsel test ve seri numaras\u0131 izlenebilirli\u011fi ile birlikte y\u00fcksek h\u0131zl\u0131 SMT kullanan elektronik \u00fcretim operasyonlar\u0131n\u0131 tan\u0131mlad\u0131. Bu y\u0131\u011f\u0131n \u00f6nemlidir \u00e7\u00fcnk\u00fc hi\u00e7bir makine ger\u00e7e\u011fin tamam\u0131n\u0131 g\u00f6remez. SPI hacmi ve hizalamay\u0131 g\u00f6r\u00fcr. Yerle\u015ftirme koordinatlar\u0131 ve alma davran\u0131\u015f\u0131n\u0131 g\u00f6r\u00fcr. AOI geometriyi g\u00f6r\u00fcr. X-ray gizli lehim yap\u0131lar\u0131n\u0131 g\u00f6r\u00fcr. Test elektri\u011fi g\u00f6r\u00fcr. \u0130zlenebilirlik, insanlar unuttuktan sonra kal\u0131plar\u0131 g\u00f6r\u00fcr. D\u00f6ng\u00fc bu. \u0130\u015fte bu y\u00fczden daha iyi alma ve yerle\u015ftirme makineleri<\/a><\/strong> veri disiplinini s\u0131k\u0131la\u015ft\u0131rmadan sadece yolun bir k\u0131sm\u0131n\u0131 kat edebilirsiniz. H\u0131zl\u0131 hurda yine de hurdad\u0131r. (s3vi.ndc.nasa.gov<\/a>)<\/p>\n\n\n\n

Ve \u00fcretim ortam\u0131, bir\u00e7ok tedarik\u00e7inin g\u00f6z ard\u0131 etti\u011fi ba\u015far\u0131s\u0131zl\u0131\u011f\u0131n tad\u0131n\u0131 de\u011fi\u015ftirir. \u0130\u00e7inde prototip k\u00fc\u00e7\u00fck parti hatlar\u0131<\/a><\/strong>, de\u011fi\u015fim kaosu katildir. Yanl\u0131\u015f makara. Yanl\u0131\u015f polarite. Bir istasyonda g\u00fcncellenen ancak di\u011ferinde g\u00fcncellenmeyen k\u00fct\u00fcphane. S\u00fcre\u00e7 rozeti takan insan kurulum hatas\u0131. \u0130\u00e7inde y\u00fcksek h\u0131zl\u0131 seri \u00fcretim hatlar\u0131<\/a><\/strong>, tehlike farkl\u0131d\u0131r: muhasebe sorunu haline gelene kadar hacimle \u00e7arp\u0131lan k\u00fc\u00e7\u00fck tekrarlanabilir sapma. Ayn\u0131 mekanizma ailesi. Farkl\u0131 ceset say\u0131s\u0131.<\/p>\n\n\n\n

Geri \u00e7a\u011f\u0131rmalar, kusurunuzun \u201c\u00f6nemsiz\u201d olup olmad\u0131\u011f\u0131yla ilgilenmez\u201d<\/h2>\n\n\n\n

\u0130\u015fte bu noktada konu\u015fma akademik olmaktan \u00e7\u0131k\u0131yor.<\/p>\n\n\n\n

A\u015fa\u011f\u0131daki her saha \u00e7a\u011fr\u0131s\u0131 yerle\u015ftirmeden gelmedi. Bunu s\u00f6ylemiyorum. Sekt\u00f6r\u00fcn, binadan \u00e7\u0131k\u0131p ba\u015fka birinin acil durumu haline gelene kadar elektrik a\u00e7\u0131klar\u0131 ve k\u0131sa devreleri k\u00fc\u00e7\u00fck temizlik sorunlar\u0131ym\u0131\u015f gibi davranmaya devam etti\u011fini s\u00f6yl\u00fcyorum.<\/p>\n\n\n\n

Reuters \u015eubat 2024\u201cte Honda'n\u0131n ABD'deki 750.000 arac\u0131n\u0131 geri \u00e7a\u011f\u0131rd\u0131\u011f\u0131n\u0131 \u00e7\u00fcnk\u00fc \u00f6n yolcu koltu\u011fu a\u011f\u0131rl\u0131k sens\u00f6r\u00fcn\u00fcn \u00e7atlay\u0131p k\u0131sa devre yapabilece\u011fini bildirdi ve Reuters ayr\u0131ca Honda'n\u0131n konuyla ba\u011flant\u0131l\u0131 3.834 garanti talebi ald\u0131\u011f\u0131n\u0131 s\u00f6yledi. Tekrar okuyun-3,834 garanti talebi. Bu say\u0131, kusur zaten ka\u00e7t\u0131ktan sonra \u201dizleyece\u011fiz\" gibi g\u00f6r\u00fcnen \u015feydir. (reuters.com<\/a>)<\/p>\n\n\n\n

Bir de daha b\u00fcy\u00fck bir kamu karma\u015fas\u0131 var. Reuters, Eyl\u00fcl 2023'te Hyundai ve Kia'n\u0131n elektrik k\u0131sa devre kaynakl\u0131 yang\u0131n riskleri nedeniyle toplam 3,37 milyon ABD arac\u0131n\u0131 geri \u00e7a\u011f\u0131rd\u0131\u011f\u0131n\u0131 bildirdi. Daha sonraki raporlarda, Hyundai 21 yang\u0131n ve 21 di\u011fer termal olay rapor etti\u011fini, Kia'n\u0131n ise en az 10 do\u011frulanm\u0131\u015f yang\u0131n ve erime olay\u0131 rapor etti\u011fini s\u00f6yledi. Bu art\u0131k bir kalite KPI'\u0131 de\u011fil. Bu ulusal bir haber. (reuters.com<\/a>)<\/p>\n\n\n\n

Peki ya t\u0131bbi cihaz taraf\u0131? Daha da az ba\u011f\u0131\u015flay\u0131c\u0131. FDA, Philips Azurion sistemleri i\u00e7in 2024 S\u0131n\u0131f 2 bir geri \u00e7a\u011f\u0131rma yay\u0131nlad\u0131 ve g\u00fc\u00e7 \u00e7eviricideki bask\u0131l\u0131 devre kart\u0131 d\u00fczene\u011findeki potansiyel bir k\u0131sa devrenin sigortalar\u0131 att\u0131rabilece\u011fini ve sistemi i\u015flevsiz hale getirebilece\u011fini, bunun da bir prosed\u00fcr\u00fc geciktirme veya sonland\u0131rma riski ta\u015f\u0131d\u0131\u011f\u0131n\u0131 belirtti. Bu c\u00fcmle, \u015fortlar hakk\u0131nda hala hurda kutusundaki bir rahats\u0131zl\u0131km\u0131\u015f gibi konu\u015fan herkesi ay\u0131ltmal\u0131. (accessdata.fda.gov<\/a>)<\/p>\n\n\n\n

Yani evet, bence \u00e7ok say\u0131da SMT operasyonu hala elektrik riskini d\u00fc\u015f\u00fck fiyatland\u0131r\u0131yor. Birim \u00e7\u0131kt\u0131ya tak\u0131l\u0131p kal\u0131yorlar ve ka\u00e7an bir gizli hatan\u0131n maliyetini d\u00fc\u015f\u00fck hesapl\u0131yorlar. K\u00f6t\u00fc matematik.<\/p>\n\n\n\n

\"SMT<\/a><\/figure>\n\n\n\n

Hatt\u0131n asl\u0131nda izlemesi gerekenler<\/h2>\n\n\n\n
Ar\u0131za mekanizmas\u0131<\/th>Tipik yerle\u015ftirme tetikleyicisi<\/th>Yayg\u0131n elektriksel sonu\u00e7<\/th>Do\u011frulanmas\u0131 gereken ilk \u015fey<\/th><\/tr><\/thead>
\u00c7ip par\u00e7alar\u0131nda yanal \u00e7\u0131k\u0131nt\u0131<\/td>Ofset yerle\u015ftirme, k\u00f6t\u00fc g\u00f6r\u00fc\u015f merkezleme, yanl\u0131\u015f k\u00fct\u00fcphane orijini<\/td>A\u00e7\u0131k, aral\u0131kl\u0131 temas, bir tarafta zay\u0131f dolgu<\/td>K\u00fct\u00fcphane centroidi, nozul merkezleme, yerle\u015ftirme tekrarlanabilirli\u011fi<\/td><\/tr>
\u0130nce aral\u0131kl\u0131 e\u011frilik veya rotasyon<\/td>Besleyici hatvesi kaymas\u0131, pikap d\u00f6n\u00fc\u015f hatas\u0131, zay\u0131f referans d\u00fczeltmesi<\/td>Biti\u015fik u\u00e7lar aras\u0131nda \u015fort, \u0131slak olmayan a\u00e7\u0131kl\u0131klar<\/td>Besleyici indeksleme, d\u00f6n\u00fc\u015f d\u00fczeltme, levha telafisi<\/td><\/tr>
Par\u00e7a e\u011fimi veya zay\u0131f e\u015f d\u00fczlemlilik<\/td>Z-y\u00fckseklik hatas\u0131, a\u015f\u0131nm\u0131\u015f nozul, e\u011frilmi\u015f paket veya PCB<\/td>Gizli a\u00e7\u0131k, zay\u0131f ba\u011flant\u0131, \u00e7atlamaya e\u011filimli ba\u011flant\u0131<\/td>E\u015f d\u00fczlemlilik kontrol\u00fc, nozul sa\u011fl\u0131\u011f\u0131, yerle\u015ftirme kuvveti<\/td><\/tr>
Yeniden ak\u0131\u015ftan \u00f6nce macun bozulmas\u0131<\/td>A\u015f\u0131r\u0131 kuvvet, dengesiz kart deste\u011fi, zay\u0131f macun sal\u0131n\u0131m\u0131<\/td>Lehim k\u00f6pr\u00fcs\u00fc, yetersiz ba\u011flant\u0131 hacmi<\/td>SPI-yerle\u015ftirme korelasyonu, kafa kalibrasyonu, konvey\u00f6r stabilitesi<\/td><\/tr>
Merkezden uzak daha a\u011f\u0131r paketler<\/td>Marjinal yerle\u015ftirme art\u0131 daha sonra titre\u015fim veya \u015fok<\/td>Saha \u00e7atla\u011f\u0131, aral\u0131kl\u0131 a\u00e7\u0131k<\/td>Ofset trend verileri, AOI\/X-ray ge\u00e7mi\u015fi, stres testi<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Bu masa, tak\u0131mlar\u0131n hat duvar\u0131na sabitlemesi gereken bir par\u00e7a. Ciddiyim.<\/p>\n\n\n\n

\u00c7\u00fcnk\u00fc makine belirtisi, lehim belirtisi ve elektrik belirtisi birbiriyle ili\u015fkilidir ancak ayn\u0131 olay de\u011fildir. Bu katmanlar\u0131 birbirine kar\u0131\u015ft\u0131r\u0131rsan\u0131z k\u00f6k neden yerine folklor elde edersiniz. Onlar\u0131 ay\u0131r\u0131n ve sis da\u011f\u0131ls\u0131n. Genellikle.<\/p>\n\n\n\n

\"SMT<\/a><\/figure>\n\n\n\n

SSS<\/h2>\n\n\n\n

SMT montaj\u0131nda elektriksel a\u00e7\u0131lmalara ne sebep olur?<\/h3>\n\n\n\n

SMT montaj\u0131ndaki elektriksel a\u00e7\u0131kl\u0131klar, genellikle yerle\u015ftirilen bir bile\u015fen ofset yerle\u015ftirme, e\u011fim, zay\u0131f e\u015f d\u00fczlemlilik, yetersiz lehim geometrisi veya daha sonra stres alt\u0131nda \u00e7atlak b\u00fcy\u00fcmesi nedeniyle pedine sabit bir metalurjik ba\u011flant\u0131 olu\u015fturamad\u0131\u011f\u0131nda veya s\u00fcrd\u00fcremedi\u011finde olu\u015fan, ama\u00e7lanan ak\u0131m yolundaki k\u0131r\u0131lmalard\u0131r. G\u00fcnl\u00fck fabrika terimleriyle, bu, bir kez ge\u00e7ebilen, daha sonra ba\u015far\u0131s\u0131z olan veya hata ay\u0131klama s\u0131ras\u0131nda klasik \u201chata bulunamad\u0131\u201d ba\u015f a\u011fr\u0131s\u0131 gibi davranan kartlar anlam\u0131na gelir. Bu modeli istedi\u011fimden daha fazla g\u00f6rd\u00fcm. (s3vi.ndc.nasa.gov<\/a>)<\/p>\n\n\n\n

Alma ve yerle\u015ftirmeden sonra elektrik k\u0131sa devrelerine ne sebep olur?<\/h3>\n\n\n\n

Alma ve yerle\u015ftirme i\u015fleminden sonra olu\u015fan elektriksel k\u0131sa devre, biti\u015fik pedler, u\u00e7lar veya lehim birikintileri aras\u0131nda istenmeyen iletken ba\u011flant\u0131lard\u0131r ve genellikle e\u011filme, d\u00f6nme, macun yay\u0131lmas\u0131, a\u015f\u0131r\u0131 yerle\u015ftirme kuvveti veya zay\u0131f aral\u0131k kontrol\u00fc erimi\u015f lehimin izole kalmas\u0131 gereken d\u00fc\u011f\u00fcmler aras\u0131nda k\u00f6pr\u00fc olu\u015fturmas\u0131na izin verdi\u011finde tetiklenir. Daha az kibarca s\u00f6ylemek gerekirse: i\u015flem penceresi \u00e7ok darald\u0131 ve hat m\u00fccadeleyi kaybetti. Bazen k\u00f6pr\u00fc barizdir. Bazen i\u015fleri daha da k\u00f6t\u00fcle\u015ftirmek i\u00e7in kirlenmeyi, nemi veya \u0131s\u0131y\u0131 bekler. (s3vi.ndc.nasa.gov<\/a>)<\/p>\n\n\n\n

Elektriksel a\u00e7\u0131kl\u0131klar ve k\u0131sa devreler \u00e7o\u011funlukla yeniden ak\u0131\u015f hatalar\u0131 m\u0131d\u0131r?<\/h3>\n\n\n\n

Elektriksel a\u00e7\u0131kl\u0131klar ve k\u0131sa devreler esas olarak yeniden ak\u0131\u015f hatalar\u0131 de\u011fildir; bunlar, k\u00f6k nedenleri bask\u0131, yerle\u015ftirme, e\u015f d\u00fczlemlilik, kirlenme veya aral\u0131k tasar\u0131m\u0131nda ba\u015flayabilen montaj d\u00fczeyinde sonu\u00e7lard\u0131r ve yeniden ak\u0131\u015f genellikle daha \u00f6nceki i\u015flem hatalar\u0131n\u0131n g\u00f6r\u00fcn\u00fcr hale geldi\u011fi a\u015fama olarak i\u015flev g\u00f6r\u00fcr. Bu ayr\u0131m insanlar\u0131n kabul etti\u011finden daha \u00f6nemlidir, \u00e7\u00fcnk\u00fc ger\u00e7ek sorun besleyici kurulumunda, paket verilerinde veya kart deste\u011finde ya\u015fand\u0131\u011f\u0131nda f\u0131r\u0131n ayarlar\u0131n\u0131 takip etmek zaman kayb\u0131na neden olur ve yanl\u0131\u015f s\u00fcre\u00e7 sahibini korur. (s3vi.ndc.nasa.gov<\/a>)<\/p>\n\n\n\n

Y\u00fcksek kar\u0131\u015f\u0131ml\u0131 PCB montaj\u0131nda a\u00e7\u0131kl\u0131klar\u0131 ve k\u0131sa devreleri nas\u0131l azalt\u0131rs\u0131n\u0131z?<\/h3>\n\n\n\n

Y\u00fcksek kar\u0131\u015f\u0131ml\u0131 PCB montaj\u0131nda a\u00e7\u0131klar\u0131 ve k\u0131sa devreleri azaltmak, do\u011frulanm\u0131\u015f k\u00fct\u00fcphane verileri, besleyici ve noz\u00fcl bak\u0131m\u0131, disiplinli ilk par\u00e7a do\u011frulamas\u0131 ve kapal\u0131 d\u00f6ng\u00fc denetimi yoluyla \u015fablon bask\u0131s\u0131, yerle\u015ftirme ve yeniden ak\u0131\u015f aras\u0131ndaki aktar\u0131m\u0131 stabilize etmek anlam\u0131na gelir, b\u00f6ylece k\u00fc\u00e7\u00fck geometri hatalar\u0131 bir\u00e7ok yap\u0131ya yay\u0131lmadan \u00f6nce d\u00fczeltilir. D\u00fcr\u00fcst olmak gerekirse, d\u00fczeltmenin \u00e7o\u011fu s\u00fcre\u00e7 disiplinidir. Sihir de\u011fil. Mucize bir makine de\u011fil. Sadece iyi kurulum kontrol\u00fc, ger\u00e7ek geri bildirim d\u00f6ng\u00fcleri ve de\u011fi\u015fim s\u0131ras\u0131nda daha az \u201ciyi olmal\u0131\u201d karar\u0131.<\/p>\n\n\n\n

Ekibiniz aral\u0131kl\u0131 a\u00e7\u0131lmalar\u0131, rastgele k\u00f6pr\u00fcleri ve hayalet saha d\u00f6n\u00fc\u015flerini izole lehim sorunlar\u0131 olarak ele almaya devam ediyorsa, muhtemelen ilk anlaml\u0131 neden yerine son g\u00f6r\u00fcn\u00fcr belirtiye bak\u0131yorsunuzdur. Yukar\u0131 ak\u0131\u015ftan ba\u015flay\u0131n. Paket k\u00fct\u00fcphanesini denetleyin. Trend besleyici kaymas\u0131. Noz\u00fcl a\u015f\u0131nmas\u0131n\u0131 kontrol edin. Destek tak\u0131mlar\u0131n\u0131 tekrar g\u00f6zden ge\u00e7irin. Denetim korelasyonunu s\u0131k\u0131la\u015ft\u0131r\u0131n. Ve hatt\u0131n kendisi sorunun bir par\u00e7as\u0131ysa, a\u015fa\u011f\u0131dakilere daha yak\u0131ndan bak\u0131n Anahtar teslim SMT hatt\u0131 \u00e7\u00f6z\u00fcmleri<\/a><\/strong>, g\u00fc\u00e7lendirmek e\u011fitim ve sat\u0131\u015f sonras\u0131 destek<\/a><\/strong>, ve ger\u00e7ek m\u00fc\u015fteri vakalar\u0131<\/a><\/strong> Bu kusurlar hurdaya, garanti taleplerine ve itibar kayb\u0131na d\u00f6n\u00fc\u015fmeden \u00f6nce.<\/p>","protected":false},"excerpt":{"rendered":"

PCB montaj\u0131ndaki elektriksel a\u00e7\u0131klar ve k\u0131sa devreler genellikle lehimlemeden sorumlu tutulur, ancak bu a\u00e7\u0131klama genellikle \u00e7ok s\u0131\u011fd\u0131r. \u00c7o\u011fu durumda, ger\u00e7ek kusur yerle\u015ftirme s\u0131ras\u0131nda ba\u015flar ve ancak daha sonra yeniden ak\u0131tma, inceleme veya sahada g\u00f6r\u00fcn\u00fcr hale gelir.<\/p>","protected":false},"author":1,"featured_media":5841,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[837],"tags":[1174,1012,1175,1176,1178,1177],"class_list":["post-5840","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-process-quality","tag-electrical-opens-and-shorts","tag-pcb-assembly-quality","tag-pick-and-place-placement-errors","tag-smt-defects","tag-smt-inspection","tag-solder-joint-failures"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/posts\/5840","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/comments?post=5840"}],"version-history":[{"count":3,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/posts\/5840\/revisions"}],"predecessor-version":[{"id":6352,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/posts\/5840\/revisions\/6352"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/media\/5841"}],"wp:attachment":[{"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/media?parent=5840"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/categories?post=5840"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pickandplacemachine.com\/tr\/wp-json\/wp\/v2\/tags?post=5840"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}