So yesterday I got a package. It was my brand new (used before, but brand new for me) FocBox 1.6.
I soldered new wires, bullet connectors and XT-90 and everything was working like it should. I did the setup with the following settings:
Motor max: 70A
Motor min: -60A
Battery max: 45A
Battery min: -15A
Today I went on the first test ride. Pumped up and ready to shred. Everything went fine the first kilometers. Temperature was maybe a bit high (60C at max). Then I came to this long long long road where I went nuts. Full throttle most of the time, 45 km/h most of the time and temperature eventually got higher. Temperature reached 70C (probably 80C but I had put my phone down in my pocket so I wouldn’t crash doing 45 km/h.)
So I eventually reached a light signal and had to brake. I braked pretty hard and at some point I noticed I had lost my brakes completely (unfortunately at low speed…). I went on to the side walk to test my accelerator and nothing happend…
I had no choice. The time was now. I was the chosen one. It was time for
AN ANTI-PUSHER TO BECOME A PUSHER. THE WALK (ACTUALLY PUSH) OF SHAME
I eventually made it home after 5 km of hard pushing without dying or killing my board even more (accidentally pushed my board out in the middle of the road (no cars, unfortunately)).
Time had come, now I had to open my enclosure and focbox. This video speaks for it self…
As the video showed, no damage on the pcb.
Now to the actual issue:
My FocBox doesn’t turn on (No lights or anything)
My PC doesn’t recognize my FocBox when I plug it with USB in and give it power.
I can read 39V power when measuring Focbox negative on PCB and battery positive.
I can read 5V from the UART port when the focbox is getting power.
Since I can’t turn on my FocBox, I can’t check the terminal for any error codes…
No can-bus used.
I would appreciate if someone had any suggestions on what happend. Like usual, any input is appreciated. Also the bad ones
Often you dont see a damage when its under or inside some of the chips.
The gate resistor looks burned a bit but maybe its just the picture, I think your focbox was running at the limits and maybe sth wasnt configured right. With the hard brake it was just to much for some components, I would assume.
With my stuff, I always leave a certain buffer for safety. So I know even if something goes wrong, the components still have little room.
Was this in a single or dual config?
Does it still turn on?
EDIT: didnt see the text with the acutal issues under the pictures sorry
I configured the Focbox voltage cut-off start to 34.5V and end to 33.5V. Battery is at 38.xV
Can-bus was not connected. Only had UART + sensor + receiver connected. Could be the MCU.@AlanZhou also mentioned that. Would you be able to point out where the MCU is located? Also where is 3,3V?
Think I pushed it to the limit Could you please point out the gate resistor?
It was in a single setup. It doesn’t turn on. No lights or sounds or anything. And power goes through my anti-spark so not because of that.
Thanks a lot for all of the inputs, guys! Really appreciate it!