View Full Version : [Question(s)] I just fried my USB2Dynamixel. Why?

04-27-2014, 06:52 PM
Connected a USB2Dynamixel and (3) AX12a servos to a 6 Port AX/MX Power hub via 3pin TTL. Powered connected to 6 Port AX/MX Power hub via a 12V DC 2Amp wall wart power supply.

Fried the USB2Dynamixel and hopefully nothing else! What did I do wrong??? :confused:

04-27-2014, 07:44 PM
Was there any stray metal near the exposed pins on the bottom of the hub? Were there any custom cables being used? Is the 12V2A wall wart center positive? Do the PC and wall wart share a common ground?

12V2A is on the low side of safe for powering more than one AX-12. I've also had issues where connecting a Robotis 12V5A SMPS to the USB2Dynamixel causes the USB port to glitch out and disconnect temporarily because of a difference in ground voltages.

04-28-2014, 01:25 AM
After a bit of study, I believe the exposed pins on the bottom of the hub probably did touch the metal on my microrax support structure...
The smell of burning USB2Dynamixel is something I never hope to experience again....