Prática de Shadowing: PCB Assembly: Low Volume vs. High Volume - Aprenda a falar inglês com vídeo

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One of the first questions to ask when evaluating a PCB assembly contract manufacturer is can they handle the expected production volume?
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To answer that, we first have to understand what we mean by low, mid, and high volumes.
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For this video, we'll leave aside very high -volume consumer electronics,
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and consider more typical volumes done by US -based contract manufacturers like Z -Axis.
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Buyers of SMT printed circuit boards often consider volume in terms of boards per year, but that doesn't tell us what we need to know.
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A contract manufacturer thinks in terms of numbers of parts to be placed.
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This is
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because the speed of the SMT pick -and -place machines is
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generally the limiting factor in how fast a job can be completed.
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Consider this example.
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For this job, we need to produce 50 boards.
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For this job, we need to produce 1 ,000.
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Which is higher volume?
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This board has 1 ,800 parts, so that's a total of 90 ,000 parts in the job.
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This one has 40 parts per board for a total of 40 ,000 parts.
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We'd consider it to be a lower volume job even though it's 20 times more boards.
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One reason the number of boards doesn't give you the true picture of volume is panelization.
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For most PCB assemblies, the layout designer fits multiple boards in an array on a single substrate or panel.
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The entire panel is populated at once, and then depaneled into individual boards.
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So to produce 10 ,000 small boards, which sounds like a lot, we may need just 100 panels.
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But again, what really matters is the total number of parts in the job job.
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Now that we have a better understanding of volume, let's look at what a contract manufacturer needs in order to do low, mid, and high volumes in one factory.
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First, you need SMT lines designed for both speed and flexibility.
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These machines pick and place up to 45 ,000 parts per hour to complete high volume jobs fast, and are designed for fast changeover between jobs,
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so you can do many different lower volume jobs in a week.
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A contract manufacturer may also have a semi -automated line for lower -volume jobs, as well as new products.
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For work other than SMT assembly, we may use manual processes for low volumes and switch to robotic systems for higher volumes.
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For example, this robotic dispensing system for box builds.
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For IC programming, we can process a low volume by hand or use a robotic system for higher volumes.
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For through -hole PCB assembly and some mixed technology boards, the wave solder can handle any volume.
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For mixed technology boards that can't be wave soldered, we can do hand soldering for low volumes or robotic soldering for higher volumes.
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Visit our website to learn more about contract manufacturing of low, mid, or high volume electronic products in the USA.
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Vocabulário e dicas de fala para esta lição

Esta aula de conversação usa o vídeo “PCB Assembly: Low Volume vs. High Volume”. As palavras que mais se repetem: volume, board, parts, contract, manufacturer. Este vídeo tem 32 frases e 471 palavras para praticar shadowing. A fala dura 3:00. O falante fala em ritmo natural, cerca de 157 palavras por minuto, próximo de uma conversa do dia a dia. 82% das palavras estão entre as 3.000 mais comuns do inglês; vale a pena estudar o restante antes de começar.

Vocabulário principal deste vídeo

15 palavras do vídeo que vale a pena aprender, com pronúncia e significado:

PalavraPronúnciaSignificado
manufacturer substantivo/ˌmænjʊˈfæktʃəɹə/fabricante
robotic adjetivo/ɹoʊˈbɑtɪk/robótico
circuit substantivo/ˈsɝ.kɪt/circuito, volta
designer substantivo/dɪˈzaɪnɚ/desenhador, desenhadora
manual substantivo/ˈmæn.j(u)əl/manual, manual de instruções
electronics substantivo/ɪˌlɛkˈtɹɑ.nɪks/eletrônica, eletrónica
array substantivo/əˈɹeɪ/conjunto, traje
layout substantivo/ˈleɪ.aʊt/disposição
buyer substantivo/ˈbaɪ.əɹ/comprador, compradora
flexibility substantivo/ˌflɛksɪˈbɪlɪti/flexibilidade
evaluate verbo/ɪˈvaljʊeɪt/avaliar
substrate substantivo/ˈsʌbˌstɹeɪt/substrato
solder substantivo/ˈsɒl.də(ɹ)/solda
automate verbo/ˈɔ.təˌmeɪt/automatizar
populate verbo/ˈpɒp.jʊˌleɪt/povoar

Pronúncia para ficar de olho

O falante usa 5 contrações e formas reduzidas, como doesn't, can't, we'd. Diga-as na forma curta, do jeito que você ouve.

  • Palavras longas — acerte a sílaba tônica: manufacturer /ˌmænjʊˈfæktʃəɹə/, electronics /ɪˌlɛkˈtɹɑ.nɪks/, flexibility /ˌflɛksɪˈbɪlɪti/

Sons difíceis para falantes de português:

  • Consoante final — sem acrescentar um “i” depois: robotic /ɹoʊˈbɑtɪk/, circuit /ˈsɝ.kɪt/, layout /ˈleɪ.aʊt/, evaluate /ɪˈvaljʊeɪt/, substrate /ˈsʌbˌstɹeɪt/

Como praticar com este vídeo

  1. Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
  2. Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
  3. Grave a sua voz e compare com o original, prestando atenção a palavras como manufacturer, robotic, circuit.

O que é a Técnica de Shadowing?

Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.

Técnica de shadowing: leia o guia completo passo a passo →