xplusin

xjtu -electronic information -junior
ROS/SLAM/CV

[xplusin @xplusin]

@Hn90x yes😎

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two beginners, three months, a robotic arm built from scratch.
a small step🤓

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@JessAlguacil For high-current switching, we use a DC contactor. The control circuitry is powered through an isolated DC-DC converter, providing electrical isolation between the control system and the high-power stage.

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@zarath_dev however，that’s interesting. we’ll try it

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@zarath_dev That said, we’d probably have to redesign both the mechanical interface and the end-effector electronics to support connector-style power and communication, so that would be a pretty substantial project on its own.

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@zarath_dev You make a good point. Non-rigid electrical and mechanical connections are often where problems start. There might be some clever mechanical design that could make it work reliably.

[xplusin @xplusin]

@zarath_dev Do you mean something like using an electromagnetic coupler to swap different end-effectors? We’ve actually considered that. but those types of end-effectors usually require their own power supply, makes structure more complicated. But it’s definitely an interesting direction.

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@0xreefx0 My first design used integrated sheet metal for the forearm and elbow, but manufacturing tolerances caused too much error. I happened to come across their design, and I ended up redesigning that section.

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@zarath_dev We’re considering interchangeable end-effectors for different use cases.

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@maciint0sh We originally designed our own driver board, but it didn’t perform as well as we expected. So we only kept it on the base joint, and the rest of the arm uses RS00 actuators.

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@maciint0sh kind of.