Prática de Shadowing: PCB 101 Academy - Learn how printed circuit boards are assembled - Aprenda a falar inglês com vídeo

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I am here at Roy Electronics in Northern Italy

and I'm going to share with you now the PCB assembly

process as it starts from the bareboard PCBs to the end customers.

ProElectronics have implemented a very advanced

Industry 4 .0 PCB assembly shop floor.

As you can see, there are hardly any operators in this production floor because they have chosen to implement a very high level of automation.

This is the shop floor of the future.

Let's go have a look.

The burr board goes into the laser marking machine.

The machine marks a unique serial number which comes from the ERP

and reports to the output file that the Valor IoT can then collect the data.

The serial number will enable us to track this specific board and know exactly what happened to it.

At ROI, the serial numbers are generated by the ERP and are unique to each PCB.

The screen printer applies the paste through the stencil.

Each job has a different stencil which is planned with Valor process preparation.

It must be precise per product and per revision.

At this station, we can expect a relatively high rate of defects.

It is very sensitive to environment condition, temperature, humidity, time.

This is the reason for many tests and inspections after this stage.

With Valor material management, we can conduct stencil verification by scanning the stencil barcode and reporting the exact stencil and paste we have used.

The solder paste inspection machine, referenced as SPI, tests the quality of the printer to verify

that everything was printed according to the plan and there is paste only where it should be.

The SPI will run the test program and report the findings in a file, including pass -fail as well as measurements.

This data is later on collected by Valor IoT.

Roy have three types of pick -and -place machines.

A fast pick -and -place machine, a machine with a camera for small and subtle components when accuracy is highly important,

and a very strong machine with high pressure for boards that require force in implementing its components.

Having different pick -and -place machines is typical to many manufacturers.

It allows for high accuracy and flexibility.

Valor process preparation can help in generating the assembly programs.

Valor IoT manufacturing connects to the pick and place machine and can collect data regarding machine utilization.

Valor material management helps manage the material on the machine and replacement of material when it's consumed.

At the visual inspection station, operators can validate that the correct components were placed on the board before continuing in the manufacturing process.

Valor process preparation can create a documentation which will define for the operator what should be inspected at this stage.

Here the soldering is done.

The plan for the oven is referred to as an oven profile.

The reflow oven is divided into several chambers.

The speed through each chamber can be different, and each chamber can have a different temperature.

Valo IoT Manufacturing connects to the reflow oven and receives information regarding the actual temperature and speed of the oven.

At this station, we wish to ensure

that each component was placed correctly in the right angle and that the soldering is good.

Valor process preparation can help us prepare a test program so

that the exact location where the pins contact the pads will be examined.

At this point, the SMT process is complete.

Following the SMT process, we have additional placement technologies such as through -hole and manual assembly.

At the through -hole station at Roy, we can see that the through -hole components are placed manually on the PCB,

but they are then soldered in a selective soldering oven.

There are two methods which are used to perform electrical tests on the PCB.

Bed of nails for high volume,

which allows for shorter time of testing but requires expensive development of fixtures or flying probe for high mix small volume.

It takes longer to program the flying probe and run the test but is much easier to handle new products.

Valor process preparation can help plan the fixture of the bed

of nail as well as generate a program for the flying probe machine.

In addition, Valor IoT will collect data from the different testers including the different electrical measurement as well as the pass fail.

All Valor manufacturing solutions have been integrated into the CamStar electronics suite.

Data is sent to the MES, which now runs the entire process.

For large BGA components, we need to check that the pins reach the right layer.

These pins are usually behind the component and therefore cannot be tested with AOI machines.

In this case, we use an x -ray to take an x -ray image of the PCB

and make sure that the connectivity and the soldering is adequate.

Now we can actually test the functionality of the completed product.

The preference is always to find issues through the different processes

and avoid finding defects at the last stage of the functional test.

Here, mechanical parts are assembled manually or by a robot.

At this point, the product assembly is complete.

That's it.

The product is ready to be delivered.

We can package it and send it to the end customer.

The PCB assembly process has been completed.

Now that we've learned how PCBs are made, come and join us in leading this industry.

Siemens.

Ingenuity for life.

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Vocabulário e dicas de fala para esta lição

Esta aula de conversação usa o vídeo “PCB 101 Academy - Learn how printed circuit boards are assembled”. As palavras que mais se repetem: machine, process, pcb, valor, test. Este vídeo tem 32 frases e 904 palavras para praticar shadowing. A fala dura 6:13. O falante mantém um ritmo estável de cerca de 145 palavras por minuto, confortável para o shadowing. Apenas 78% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente.

Vocabulário principal deste vídeo

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

Palavra	Pronúncia	Significado
component substantivo	/kəmˈpoʊ.nənt/	componente
oven substantivo	/ˈʌ.vn̩/	forno
preparation substantivo	/ˌpɹɛpəˈɹeɪʃ(ə)n/	preparação
collect verbo	/ˈkɑlɪkt/	juntar, reunir
pasta substantivo	/ˈpɑ.stə/	massa, macarrão
chamber substantivo	/ˈt͡ʃeɪ̯mbɚ/	câmara, quarto
operator substantivo	/ˈɑpəˌɹeɪtɚ/	telefonista
pin substantivo	/pɪn/	alfinete
serial adjetivo	/ˈsɪɹ.i.əl/	serial
generate verbo	/ˈd͡ʒɛn.ə.ɹeɪt/	gerar
implement verbo	/ˈɪmpləmənt/	implementar
electronics substantivo	/ɪˌlɛkˈtɹɑ.nɪks/	eletrônica, eletrónica
inspection substantivo	/ɪnˈspɛkʃən/	inspeção
probe substantivo	/pɹoʊb/	sonda
connect verbo	/kəˈnɛkt/	conectar

Gramática neste vídeo

As estruturas que o falante mais usa, com as palavras exatas do vídeo:

Estrutura	No vídeo
Voz passiva be + particípio passado — o foco está no que acontece, não em quem faz	are generated · is planned · was printed
Present perfect have/has + particípio passado — uma ação passada que ainda importa agora	have implemented · have chosen · have been integrated
Orações relativas who / which + oração — informação extra sobre uma pessoa ou coisa	stencil which is · documentation which will · methods which are

Pronúncia para ficar de olho

O falante usa 3 contrações e formas reduzidas, como I'm, they're, we've. Diga-as na forma curta, do jeito que você ouve.

Os sons de “sh” e “zh”: preparation /ˌpɹɛpəˈɹeɪʃ(ə)n/, inspection /ɪnˈspɛkʃən/, measurement /ˈmɛʒ.ə.mənt/, documentation /ˌdɑkjəmɛnˈteɪʃən/, revision /ɹəˈvɪʒ.ən/
Palavras longas — acerte a sílaba tônica: preparation /ˌpɹɛpəˈɹeɪʃ(ə)n/, operator /ˈɑpəˌɹeɪtɚ/, electronics /ɪˌlɛkˈtɹɑ.nɪks/, electrical /ɪˈlɛktɹɪkəl/, accuracy /ˈæk.jɚ.ə.si/

Sons difíceis para falantes de português:

Consoante final — sem acrescentar um “i” depois: component /kəmˈpoʊ.nənt/, collect /ˈkɑlɪkt/, generate /ˈd͡ʒɛn.ə.ɹeɪt/, implement /ˈɪmpləmənt/, probe /pɹoʊb/
/l/ final — a língua toca o céu da boca, não vira “u”: serial /ˈsɪɹ.i.əl/, electrical /ɪˈlɛktɹɪkəl/, nail /neɪl/, angle /ˈæŋ.ɡəl/, mechanical /məˈkænəkəl/
s + consoante no início — sem um “i” antes: suite /swiːt/, scan /skæn/, stencil /ˈstɛnsəl/

Como praticar com este vídeo

Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
Faça shadowing frase por frase na velocidade normal, repetindo cada uma até o seu ritmo ficar igual ao do falante.
Grave a sua voz e compare com o original, prestando atenção a palavras como component, oven, preparation.

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 →

Prática de Shadowing: PCB 101 Academy - Learn how printed circuit boards are assembled - Aprenda a falar inglês com vídeo

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