I'm a pretty experienced builder and I'm working on my flight practice. I've built several multirotors without serious issue, but my second-hand Tarot 680 Hex is giving me a problem with the BECs.
Build: Pixhawk, Tarot680 Hex, 6x iPeaka SK40A (40A ESC, 3-6S w/ 3A linear BEC), Multistar 4S 5200mAh
My problem is that the linear BECs from my iPeaka SK40A ESCs do not seem to be sharing the current draw of the system (only charging 1 GoPro Hero 4). ESCs for motor number 1 and 2 become extremely hot when the GoPro is conected to draw power (measured 200F with my IR thermometer at 0.5 emissivity) while the other 4 ESCs did not become noticeably warmer. The GoPro is connected correctly, as evidenced by it's continued function and charging indicator activation when plugged into the 5V rail on the Pixhawk. Each BEC is rated for 3A and indeed, under the shrink there are 3 1A regulators on each ESC. My gopro was fully charged by PC before I connected it to my pixhawk.
Does anyone have experience powering peripherals on 5V using the ESC BECs? Is there a simple way to balance the load between all six ESCs? Or should this happen automatically?
It's almost as if current is being drawn from each ESC sequentially from #1 to #6. #1 became the hottest, followed by #2, while the others did not become hot.
Any help is greatly appreciated.