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Jcat
Bewertet in den USA am7. Juli 2024
This is a hefty servo that runs on a proprietary one-wire serial protocol, and all of the product documentation points you to a serial bus driver board - there's no explicit documentation to be found on the protocol itself. If you dig, there is a library published from the wavesahre wiki as a ZIP file for use by the driver board, and in that zip file is an 'SCServo' library that includes the underlying serial protocol implementation. Once you have that in hand, you now need to get a one-wire serial connection in place, which usually takes a few external components. Then you can control these directly. Just... buy the serial driver board, unless you really need to control these independently - it'll save a lot of headache. That said, it's a powerful servo, and part of a product family (ST/SC) that can be serially linked on the same bus for compact control over a long chain of devices, assuming you can supply enough power... when locked, these servos can draw a lot of power (up to ~30W). Despite the challenges in getting this working, you get a lot of functionality - great accuracy, good speed, several movement modes (e.g., absolute, incremental, etc...). The servo does come with aluminum accessories to make mounting and coupling relatively easy and very robust.TL;DR: If you need a powerful and functionally flexible servos, will be controlling several of them together, and don't mind using a dedicated breakout controller, then this is a good option. If you're just looking for a simple or single servo for experimentation, look for a more traditional stand-alone servo unit.
Will
Bewertet in den USA am14. Juli 2024
Review of Waveshare 25kg.Cm Wide Range Voltage Serial Bus Servo, High Precision and Large TorqueOn paper this servo sounds fantastic - and I'm sure it is - once you get it up and running. With being able to get feedback from the motor and drive it like a motor or a servo it opens up an amazing new world of possibilities.However to easily access that new world you need the driver board. It is not crazy expensive and has a ton of features and documentation on the Waveshare wiki, but it seems the only alternate to this board is to build an interface using some GPIO pins and an SN74LVC1G126 3-state buffer. Although the Waveshare wiki gives you the circuit diagram for this, it is really confusing and poorly documented. It is easy to get confused with the driver board interface and the DIY interface.My advice would to be sure to get the "Waveshare ESP32 Servo Driver Expansion Board Built-in WiFi Dedicated Driver Board Designed for Serial Bus Servos" so you can quickly play with the servos and not spend hours digging through documentation, making a driver circuit, and poking around blindly with code that you have no idea if it works.I'm a big fan of Waveshare thanks to their documentation and example code and support, however on this one I'm knocking off a star because at least at the time of writing this review the DIY route of controlling it is poorly documented.
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