Prática de Shadowing: Adding an E-Stop to our Conveyor Build! #plc #automation #engineering #robotics #mechatronics - Aprenda a falar inglês com vídeo
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This one's for the safety lovers.
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Today we're adding an emergency stop, aka e -stop, to our conveyor system.
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Most industrial equipment with moving hazards require clear and easy access to e -stops.
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Stuff gets jammed in moving parts.
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People find ways to insert themselves into parts of the machine you never expected e -stops need to be readily available, often at multiple points in the machine.
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There are many ways to incorporate e -stops, but the simplest is to use it to physically interrupt power to your motion component.
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You don't want to kill power to an entire PLC, lose diagnostics, telemetry, and it could take a lot longer to recover from.
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Instead, we take the loop that feeds the motor starter or drive and interrupt that with the e -stop.
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Also a requirement that when an e -stop is pressed and then released, the machine does not unexpectedly resume motion,
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so the PLC definitely needs to know that the e -stop was hit because a reset command has to be sent.
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Fortunately, many e -stops have a normally open and normally closed circuit.
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We can take the normally closed circuit for our motor connection.
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When it gets hit, we can use the normally open circuit to tell the PLC that the e -stop's been pressed.
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Now we can write PLC logic to require a reset, share a tag to our HMI to display to the operator that an e -stop's been pressed,
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and even add it to a SQL database log to log when e -stops have been pressed.
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Getting your e -stop placement and electrical design right is critically important for user safety on any machine.
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Even though just our motor command is relatively low stakes for this build, Next, we'll be adding in a pick and place gantry to this cell
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and having an e -stop to kill that motion is going to be essential.
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Vocabulário e dicas de fala para esta lição
Este vídeo tem 18 frases e 319 palavras para praticar shadowing. A fala dura 1:32. O falante fala rápido, cerca de 208 palavras por minuto, então espere sons ligados e reduzidos. Apenas 76% 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 |
|---|---|---|
| circuit substantivo | /ˈsɝ.kɪt/ | circuito, volta |
| reset verbo | /ɹiːˈsɛt/ | repor, restaurar |
| interrupt verbo | /ˌɪntəˈɹʌpt/ | interromper |
| component substantivo | /kəmˈpoʊ.nənt/ | componente |
| operator substantivo | /ˈɑpəˌɹeɪtɚ/ | telefonista |
| database substantivo | /ˈdeɪtəˌbeɪs/ | banco de dados, base de dados |
| physically advérbio | /ˈfɪz.ɪ.kli/ | fisicamente |
| loop substantivo | /luːp/ | laço |
| recover verbo | /ɹɪˈkʌvɚ/ | recuperar |
| lover substantivo | /ˈlʌvɚ/ | amante |
| requirement substantivo | /ɹɪˈkwaɪɹmənt/ | exigência, requisito |
| jam substantivo | /ˈd͡ʒæm/ | geleia, compota |
| stake substantivo | /steɪk/ | estaca |
| resume verbo | /ˈɹɛz.ə.meɪ/ | retomar, continuar |
| placement substantivo | /ˈpleɪ̯smənt/ | colocação, posicionamento |
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 | is pressed · was hit · been pressed |
| Present perfect have/has + particípio passado — uma ação passada que ainda importa agora | have been pressed |
Pronúncia para ficar de olho
O falante usa 3 contrações e formas reduzidas, como don't, we'll, we're. Diga-as na forma curta, do jeito que você ouve.
- Palavras longas — acerte a sílaba tônica: electrical /ɪˈlɛktɹɪkəl/, operator /ˈɑpəˌɹeɪtɚ/, fortunately /ˈfɔɹ.t͡ʃə.nɪt.li/, critically /ˈkɹɪt.ɪ.kə.li/, incorporate /ɪŋˈkɔɹ.pɚ.eɪt/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
- Grave a sua voz e compare com o original, prestando atenção a palavras como circuit, reset, interrupt.
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.