Richardo

Batch 2 wheel Board replaced with a v1 replacement board (not the new improved MOSFET board) (first cutout killed the mosfets, starting from a stopped position) spin tested fine kickstand up, and if there was anything inside the housing of the wheel it was undetectable. Traveling on flat, smooth pavement, riding at maybe 20mph. No changes in acceleration. Heard what I'd describe as half a beep before it lost power (turned off?) max MOSFET temp 43c/109F battery 80% mosfets fine afterwards, turned back on fine afterwards not fancier, street mode, not split mode I had a fun hundred milliseconds balancing the no-power wheel at 20mph before I hit the pavement. Wearing a helmet and wrist guards. The wrist guards were abraded and did their job, but I lost considerable skin on my forearms, upper arm, and butt-cheek. My last real crash on the road (on a bicycle) left me in the hospital for two months so I was really stoked to find I only had soft tissue damage and you couldn't even see muscle or bone through the holes. That was a real highlight here, as well as the way good-samaratian drivers immediately used their cars to block the road as I was crawling to the sidewalk, then attempted to minister to me aftewards. Chicago can be pretty fucking nice. Looking at the graphs, it looks like the type of power-off cutout you'd get from free-spinning the wheel, and there is a mysterious oscillation in the measured speed (on the graphs) right before the problem occurred- but I was not free-spinning it, just the smoothest riding you could imagine. I had almost regained my faith in this thing after taking it off-road (in dry conditions) and on short trips around the neighborhood. Now I'm pissed and don't want to ride it ever again, even after upgrading the board. My wife has been so stoic and supportive despite her fears about me on wheels, it makes me feel like absolute shit to confront the fact that I have been lying to myself about the safety here while my family depends on me. Thank God for knockoff Tegaderm. What causes a cutout like this?

I'm a big aliexpress guy and for most anything made in China, I go to the source and buy it there. HOWEVER I would never buy an EUC from Aliexpress. Or Amazon. EUCs are not at the stage in development where you can trust it'll be reliable. It's common to need service, and you'll need a relationship with the retailer to get that service, because parts have always been in short supply. You're asking for advice, so I say find a domestic dealer (like ewheels) and buy from them. Not only do you get better service, but they are our advocates in the fight to make the manufacturers improve.

My body just started understanding this when hitting speed bumps at speed. There is some magic to keeping your legs “loose” and boom they can just flex with the movement, leaving your torso alone. I think i was slow to learn this because i went from a mTen3 that i dont take any bumps with to a v11 that took the bumps for me. Its only after riding the v12 for a while that i started to adapt.

I think we'd all agree that e-scooters have the worst tradeoffs by far. Enormous Extremely heavy Taking even one hand off courts disaster, as does hanging a grocery bag on the handlebar No cargo space, plus can't carry anything in your hands more difficult to lock up than a bicycle just as bad tire changes, twice as many tires to change more maintenance, they devour brakes and the stems get loose more rolling resistance, needs a bigger battery, battery starts to sag and the scooter drags low rake angle makes them less stable at high speeds smaller wheels means even tiny obstacles can send you over the handlebars they lose all traction in wet conditions same crash types as an EUC, requiring full face helmet and making it borderline requirement to wear lots of gear waterproofing issues, possibly worse than an EUC. same battery fire issues as EUCs E Scooters were my first PEVs and while they're a lot of fun, and have a few advantages over EUCs (like being able to drift and burn out, which I find really fun, plus being easier to 'mod' by sticking things on the handlebar & stem), the tradeoffs are unacceptable if you have the courage to learn a unicycle.

I'm not an expert, but I believe you want to avoid touching the middle MOSFET foot (the gate) at all! the gate is extremely sensitive to current, and the MOSFET can be ruined by a static spark too small to see or feel. The continuity tester has to run a current through the circuit to test it, and I believe that could potentially damage the MOSFET. Can an EE chime in to verify my paranoia? Or dismiss it?

The other ones i didnt see mentioned are carrying cargo and riding on ice/snow. i can pretty easily carry a full grocery load for my family on a bike. Has to be a small load on the EUC. and i feel completely confident riding the bike on snow and ice on the street, but even snow it feels like a terrible decision to commute on an euc.

that's a fucking nasty type of accident and I had a few close calls of this variety when I started riding my bike in the city. It felt like a dream where I was like "Is this seriously fucking happening!?" as the turning truck's trailer started to push me & I had to bail and scramble onto the sidewalk. Fortunately I was at a complete stop and could make that move. We'll probably see all the standard bicyclist-killing accidents start taking out fellow EUC riders as EUCs become more popular.

If you look at the spreadsheet, there were plenty of batch 1 failures. https://docs.google.com/spreadsheets/d/1NYiIfiteu3MBZpzgfT4YmSZ6WDRJiaMHYxqJSx2gks8/edit#gid=1020565145

One thing this made me think of: there are going to be a certain percent of home repairs that are ruined through user error, shorting a mosfet, etc. Not casting shade on anyone, its just statistically how its going to work out with hundreds of people from ll backgrounds doing a complicated repair in their house with whatever random tools they have. if people start tracking these failures, itd be good to track whether its “diy” or a professional repair

One thing this made me think of: there are going to be a certain percent of home repairs that are ruined through user error, shorting a mosfet, etc. Not casting shade on anyone, its just statistically how its going to work out with hundreds of people from ll backgrounds doing a complicated repair in their house with whatever random tools they have. if people start tracking these failures, itd be good to track whether its “diy” or a professional repair.

One thing this made me think of: there are going to be a certain percent of home repairs that are ruined through user error, shorting a mosfet, etc. Not casting shade on anyone, its just statistically how its going to work out with hundreds of people from ll backgrounds doing a complicated repair in their house with whatever random tools they have. if people start tracking these failures, itd be good to track whether its “diy” or a professional repair. One thing this made me think of: there are going to be a certain percent of home repairs that are ruined through user error, shorting a mosfet, etc. Not casting shade on anyone, its just statistically how its going to work out with hundreds of people from ll backgrounds doing a complicated repair in their house with whatever random tools they have. if people start tracking these failures, itd be good to track whether its “diy” or a professional repair.

Someone make me an avatar of riding a roulette wheel. It would be a nice generic image to represent riding the average wheel from any manufacturer.

I just noticed the Inmotion tech cracked the motherboard housing tab the same way I did https://youtu.be/Ue5vC4XhU7s?t=712 (11:53) Be careful tightening those screws, the plastic can only handle the smallest amount of torque!

Driving a car puts a human being into an easily enraged state. Drivers hate you, pedestrians, cyclists, and other drivers. In the 1990s it used to be common for the news to show drivers getting so angry they’d shoot each other. I thought it was interesting that stopped, and googled a bit to find it didn't stop at all, its just not newsworthy anymore. that said, i dont think drivers hate unicyclists more than anything else on the road.

This is half the answer- the other half was whether you verified the paste was an electrical insulator. Many thermal pastes are electrically conductive. My dealer recommended I use HY510 paste- which can be found on amazon. When I replaced the board earlier, I used Noctua nt-h2, and that has been working fine for the months I've been riding on an original replacement board. (and it's specifically listed as nonconductive paste) one other note- the thermal strip is also important as an electrical insulator. I'm writing this because someone else reading it might think they can skip the strip, or not understand that it's possible to over tighten and cause a short through the strip, or a short by cracking the insulating collars on the screws.