Turn an electromagnet by a proximity sensor

Let's Make Robots Beginners
1

Hi. I need a normally closed sensor with time delay to control an electromagnet. I am not sure what parts I need to put together this assembly. I immensely appreciate your help.

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2

Hi @abaaga!

Maybe it would be good that you share more information about the project. What do you want to achieve with this setup?

Do you already have some parts available (like this electromagnet) so you need only the sensor or you don’t have anything?

First thing that comes to my mind is that you could use Arduino to which you will connect proximity sensor and this relay. In Arduino code, you can program this time delay and also program what happens to the output based on proximity.

3

Hi Igor. Many thanks for your help.

I do not have any of the parts yet.

The objective is to use the electromagnet to accelerate metal parts traveling on a small scale non-metal gravity roller conveyor.

  1. At a lower speed, metal object enters magnetic field of the electromagnet.

  2. Accelerates towards electromagnet.

  3. Just before electromagnet a Normally Closed Sensor is placed.

  4. Accelerated metal object enters the detection zone of the NPN sensor

  5. NPN sensor turns OFF the electromagnet

  6. Time-delay, delays the ON time of the electromagnet until metal object exits the magnetic field of the electromagnet.

  7. Once the metal object is out of the magnetic field, NPN sensor turns on the electromagnet

Power Requirement can be 9V rechazable battery.

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4

Hi @abaaga and thank you for clarification.

It could look something like this:

image
image833×555 3.62 KB

I found this project on Instructables which is similar to your I would say:

What do you think?

5

Thank you very much, Igor.

I am not quite sure how it is done. I will get a couple parts then see where it is taking me.

Thanks again.

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6

You are welcome! Let us know about your progress.