I made about a 10 minute ride and noticed my board felt sluggish all of a sudden. Knowing I was nowhere near the voltage or temperature shutdown I stopped and removed my enclosure. One vesc was still operating perfectly, the other would flash 3 red lights when I applied throttle. I took the board home and plugged it into the BLDC tool. The still running vesc, no errors. The other vesc, DRV 3802 Error. How can one vesc die and the other keep going. They are literally set up identical. They are joined with a Y Cable with one of the 5v wires clipped. The board was running perfectly!
Those all look okay. Could have been an ERPM issue (you’ve got it set to 100,000, I usually say 60,000), but I’d be surprised. can you get a screenshot of the motor advanced tab?
There’s your problem. the max current ramp step is 40 and it’s suppose to be .04
this is certainly what blew your DRV chip
Yours
What it should be
This is caused by a ramp step bug that was present in an old version of vesc firmware.
Aside from that issue, your motor max is really low at 55a. most motors can go 80a easy.
And your Battery min setting is really high at -35a and is might be more than your battery can handle for regen charging.
Unfortunately I have never had a vesc with this issue and when I purchased this one I wasn’t aware of such an issue. I purchased this vesc from a member here who is a great guy and very credible. This is a tough lesson to learn.
Any clue what it will cost? Pretty sure this was a repaired cheapo vesc to start with. It may be worth buying used or cheap. I plan to do the @Titoxd10001group buy for 2 FOCBOX.
My pleasure! Good. Just in case, you check it by writing and read a few times. The values shouldn’t change. The bug was when you wrote data, it would increase by 10x. It was a bug with the initial release of 2.18 and plagued many of us (me included). It was fixed, but the firmware version was not incremented so both the buggy version and the clean version are v2.18 and the only way to tell is the repeated read/write above.
