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by twowordz
Sun Sep 01, 2019 4:28 pm
Forum: Automation, sensing and robotics
Topic: Dust collection automation 20A circuit
Replies: 17
Views: 961

Re: Dust collection automation 20A circuit

I have no idea what this "2x 120V coming in" refers to but that's not how single phase 240V mains works. It all rather confirms pcmanbob's assertion that you are out of your depth. I think you're probably used to 240v for all your appliances. Here's the wikipedia explanation for what I am talking a...
by twowordz
Sat Aug 31, 2019 10:23 pm
Forum: Automation, sensing and robotics
Topic: Dust collection automation 20A circuit
Replies: 17
Views: 961

Re: Dust collection automation 20A circuit

How exactly is this 120V contractor coil running from 240V mains ? Here's the diagram from my machine. https://i.imgur.com/19Y0KpT.jpg You get 240v from the difference between the 2x 120v coming in. I'll put my multi meter on it and confirm. In the diagram, a single wire is coming from #5 and feeds...
by twowordz
Sat Aug 31, 2019 6:16 pm
Forum: Automation, sensing and robotics
Topic: Dust collection automation 20A circuit
Replies: 17
Views: 961

Re: Dust collection automation 20A circuit

@hippy

The contractor coil is rated for 120v so I think it should work. Thanks for your input.

@pcmanbob

You know nothing about me and your post is not helpful.
by twowordz
Sat Aug 31, 2019 11:40 am
Forum: Automation, sensing and robotics
Topic: Dust collection automation 20A circuit
Replies: 17
Views: 961

Re: Dust collection automation 20A circuit

Looks like this might work.
by twowordz
Fri Aug 30, 2019 6:09 pm
Forum: Automation, sensing and robotics
Topic: Dust collection automation 20A circuit
Replies: 17
Views: 961

Re: Dust collection automation 20A circuit

hippy wrote:
Fri Aug 30, 2019 6:06 pm
Does your button actually carry the full 20A current through it ?
I think it does because the diagram doesn't show any other breakers or fuses. I'm working from memory right now but I think it's just using a leg of the 240v circuit.

Thank you for your reply.
by twowordz
Fri Aug 30, 2019 3:51 pm
Forum: Automation, sensing and robotics
Topic: Dust collection automation 20A circuit
Replies: 17
Views: 961

Dust collection automation 20A circuit

Hi, I'm considering automating my dust collection system. I'm planning to use current sensing to automatically turn on my dust collector. That part is pretty straightforward. My dust collector is 240v and 20A. There is a NEMA enclosure with Telemecanique LC1D25 contactors that use a 120v coil. There...

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