Spark-Concepts / xPRO

CNC xPRO Driver (4x DRV8825 motor drivers; dual motor confiurations on X,Y, or Z axis + wireless support
https://github.com/Spark-Concepts/xPRO
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Limit switch current #6

Open muxa opened 7 years ago

muxa commented 7 years ago

I'm wondering what current will be going through limit switches, so i can use appropriate diameter wire.

Arctic-Stingray commented 7 years ago

I would not go smaller than 20awg

On Sep 30, 2016 4:33 PM, "Mikhail Diatchenko" notifications@github.com wrote:

I'm wondering what current will be going through limit switches, so i can use appropriate diameter wire.

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Arctic-Stingray commented 7 years ago

I believe that the limit switch circuit on the xpro is 5 volts DC but I would need to check it to be sure. I was running into issues with false triggers due to wire size and length of run of the cables so I used solid state relays in my control cabinet. Doing this allowed me to keep the cable distance from the xpro to the relay down-to less than 6 inches. I just drive the solid state relays with my power supply and run the 24 volts DC through the limit switchs.

On Sep 30, 2016 4:33 PM, "Mikhail Diatchenko" notifications@github.com wrote:

I'm wondering what current will be going through limit switches, so i can use appropriate diameter wire.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/Spark-Concepts/xPRO/issues/6, or mute the thread https://github.com/notifications/unsubscribe-auth/APT0MqNXCPq-zmqZEzWGbJA0NDmH6hZiks5qvXIjgaJpZM4KLfFQ .

muxa commented 7 years ago

Thanks @Arctic-Stingray For others in metric system: 20 AWG is 0.81mm diameter

muxa commented 7 years ago

Reopening in case somebody else is interested in this (it's harder to find closed issues)

muxa commented 7 years ago

I'm getting spontaneous hard limit signals while running the machine. I've been advised to use shielded cable.