I’m seeing a lot of reports of boards locking up when riding and throwing the rider, especially Exway boards, (I have an Atlas 4wd). I assume that two of the phases must be shorted or switched in the wrong sequence to apply full brake? Is it a hardware fault or software? Seems as if it can happen intermittently so I’m guessing software. Some people report they feel a slight partial braking even right before it goes full on braking. Does the same thing happen with VESC based boards? I’m rather nervous now riding my Atlas after reading some of the horror stories and thinking about either switching the ESC to a VESC or doing a complete build. Exway does have a pretty nice sealed ESC system which might be difficult to fit a VESC in.
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Hm I’ve not seen any of the 8 exway boards I’ve had, experience this lol
I’d be inclined to think it’s lack of maintenence, or damage.
On vescs however lol overcurrent errors can easily occur if improper setup is done
I don’t think I could I could fit vesc in my atlas pro. It would be really tight. Only one I can think is maybe dv4s or maybe two m100
The board had around 80 miles on it and showed no issues besides a perhaps noisy charger. After examining the board there was no belt damage, motor damage or debris caught in the belt drive. As far as it seems it was an electrical problem and one with zero warning.
https://www.reddit.com/r/Exway/comments/15awj51/fractured_fibula_and_compartment_syndrome_due_to/
This has happened to me countless times now. Fortunately nothing too serious when it comes to injury. Exway flex riot.
https://www.reddit.com/r/Exway/comments/15awj51/comment/jtroa7c/?utm_source=share&utm_medium=web2x&context=3
Just rode my board today after updating it and while riding it at full throttle around 25 mph, the board suddenly started braking. I was thrown off the board and I am EXTREMELY lucky I wasn’t seriously injured.
https://www.reddit.com/r/Exway/comments/14o81tn/psa_firmware_updates_may_ruin_your_exway_board_or/
Received my Exway Riot with cloudwheels last month. I put over 100 miles on it and was loving life until a few hours ago. Well, today as I was going on a slight uphill incline at about 13 miles per hour, the board decided to just stop and throw me off. I was riding on asphalt, flew off and landed on my left shoulder and broke the collarbone.
https://www.reddit.com/r/Exway/comments/q9u1ce/exway_wave_put_me_in_the_hospital_emergency_room/
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I have never experienced this and set up my vescs very careless a lot of times.
What error do you exactly mean?
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What firmware you on and hardware?
Starting with 6.0 the absolute max current gets written as 1.5 what is detected. So that triggers overcurrent faults as well.
Could also mean hardware failure. I think my 2 100d are going out maybe
Or they are not compatible to a degree. 100d2 and 6485/95 teachers (I have to run different observers to work)
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This was a probably back in 2020 with a different premade board as well, but I can’t remember the exact brand. I am at least pretty sure it wasn’t Exway, and from the user reports the ESC would apply full brakes while shutting itself off.
The company never properly responded to the issue and only denied there being any issues at all so last I saw there were never any answers as to whether the ESC was programmed to always apply full brakes when it suddenly lost power or had to shut of for any reason other than the power button being pressed or not.
I think what is more dangerous about these failures is that the board was working normally until that point. If you fuck up the VESC settings you will notice it pretty quickly
I’ve only had it happen when I did a shit job at wiring and my phases shorted mid ride. Got better at soldering and wiring since then and no issues.
When a MOSFET fails, it becomes a short circuit.
When you short the terminals of an electric motor, it becomes an electric brake.
One of my boards did this earlier this summer when the Stormcore 60 failed. First it lost power and just coasted, then it locked up. Fortunately I was down to walking speed when it hit the brakes.
You could feel the braking effect when trying to turn the wheels by hand. It was still possible to turn them, but the drag was VERY significant.
Some of the boards seem to return to normal function after the initial flaw, so it doesn’t seem like it could be a shorted MOSFET:
After I got thrown off the board, I scrolled the accelerator wheel on my remote and noticed the board was now going BACKWARDS. I then turned off the remote / turned it back on and motor direction returned to normal.
I had one recently because one of my wheel balancing weights dislodged and got stuck between the hub and my gear drive. Prob won’t use weights again unless I have a robust bracket to keep them in place
There’s more than one way for a board to fail.
The OP asked about locking up, so I gave an answer about locking up.
Reversing is a whole other failure mode. Given that power-cycling the remote fixed that rider’s problem, I’d say that’s a bad remote. No idea what could cause it though.
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Had a flex that did it. Super common. Seems like faulty bms’ are the cause.
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That’s interesting. Must be cutting the discharge early/incorrectly or something
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I had an exway flex do this to me, gunning it up a hill full throttle. Defo not my fault @ShutterShock -_-
Just bc it hasn’t happened to your small sample size doesn’t mean it isn’t real. That flex had a ton of miles on it
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The flex is super old now - but that’s unfortunate. Good thing they aren’t selling it anymore lol
@me_ashman what was the rating on that lycaon BMS you bypassed?
Flex bms issue must have had something to do with the way it was put together. It would randomly cut out depending on how I stood on it, even stationary.
It had a very stupid 10amp sticker on it.
But same symptom when I bought it, would turn on and run on the bench but as soon as load is put on it the esc would cut out(bms tripped).
Fixed with a simple bypass.
When the atlas pros remote runs out of charge it locks up
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I think the Pro uses a different ESC and remote than the standard Atlas, correct?
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