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A project log for Servio

Open-source DC servomotor with extensive testing infrastructure.

veverakveverak • 04/25/2025 at 21:49•0 Comments

We got a new iteration of the board! (This one will be the final one, right? right?)

We required mostly standard iterative updates to the design. The interesting change for future users is flashing of the firmware over UART - we are now able to flash firmware over the same UART that is used for communication with the servo.

Note that this required a new plastic holder for the testjig and pogopins. I believe I am getting better and better at iterating these.

LX15D

Thanks to historical projects, we got plenty of Hiwonder LX15D servomotors lying around. These are used heavily for the project. Let's integrate servio into that.

I've got a good feeling about this. The servio fits quite well into the basic plastic insert, and I even managed to create the part self-tensioning. See the bottom wall of the insert - it bends around the motor to create pressure so it sticks in place.

After printing the first iteration of the back-seal for the servo itself, I split open the casing to see how much space is left - enough! So let's make it smaller.

As the saying goes, it blinks, it ships!

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