Limit Switches

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dr.steven.james
Posts: 1
Joined: Fri Apr 05, 2019 7:30 pm

Limit Switches

Post by dr.steven.james » Thu Jun 06, 2019 8:18 pm

I'm retrofitting a CNC and need to know how to select limit switches that are compatible with my Buildbotics controller. Some indicate that they work with Arduino, some don't say.

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Doug
Posts: 58
Joined: Fri Feb 02, 2018 4:56 pm

Re: Limit Switches

Post by Doug » Wed Jun 12, 2019 2:17 pm

Any limit switch that provides a contact closure will do the trick. The limit switch inputs on the Buildbotics Controller are just TTL compatible gates that are pulled high to 3.3Volts. The switch contacts just connect that output to ground.

I like the magnetic proximity sensors like these

https://www.digikey.com/product-detail/ ... -ND/154470

They come in two parts. If you buy them make sure you get both parts

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