Where to find used MX servo for learning PID

[kshin]

Hi, I have been trying to gain a better understanding of the Dynamixel by using the AX-12A & AX18A with Wizard2.0, SDK, etc. I've learned that the MX models have a finer controls over things like PID gains. Is there anywhere I can check to buy a used MX model? This will be just for SW and running experiments, so I don't want to spend lots of money on a new one that will just sit around. Your thoughts?

Kevin

[jwatte]

I don't know where to find them used, but the DYNAMIXEL XL430-W250-T is only $50. You'll also need some way to speak RS-485 with it -- a U2D2 or some wiring with an Arduino and a transciever or something.

[kshin]

@jwatte, thank you for the reply. Does XL430-W250-T firmware has PID gain controls like the MX servos? If so, I would definitely buy it to study with. Thank you!

--Update--
I just checked and XL430 does have PID gain control. Awesome!
https://emanual.robotis.com/docs/en/dxl/x/xl430-w250/