I have 2 ODrive v3.3 boards connected in parallel to a 24V 15A power supply and I’ve been using them for a while now for testing. I was testing sending commands over USB from Raspberry Pi 3. Only one of the boards is flashed, the other one was never flashed since I got it, my plan was to figure out everything on the first one and to flash the second one at the end, but it was still connected to power, motors and encoders
So last time I plugged in the power supply one of the motors on the active board doesn’t spin at all during the calibration phase, I figure there’s a glitch somewhere and just unplug and replug the power supply thinking that a reset will make things better. But this time the power supply doesn’t turn on and needless to say that even the other motor doesn’t go through the calibration phase.
My first assumption was that the power supply died as it was a fairly cheap one. At this point I unplug the power supply and try to replace it with a 6s LiPo battery to continue my development but to my surprise when I try to do that there’s a huge spark and the 6mm bullet connectors I was using get melted and charcoaled, the battery can dish out over 200A at 24V
So my question is did I do something wrong? (I plugged in and unplugged the same setup at least 10 times before this happened) and how can I better diagnose what exactly happened?
I measured the resistance of the power connector on the board and the presumably burnt one has a value of 0.3 ohms or less and the other one over 10k ohms