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EUC

Found 11 results

  1. please skip to bottom for potential cause if post is too long for you I. Intro Hi all, thank you creating this community. I'm excited to join you, despite having to ask for EUC help with my very first post here. Hopefully my story can help other people or serve as a cautionary tale for anyone who thinks cutoffs only happen because of speed or overleaning. I was lucky with my fall but it could've been way worse. II. Unexpected first cutoff and fall ~25km/h I bought my MCM4 (HS 680wh) a month and a half ago second hand ( ~970km) and it served me very well for 200km, until it suddenly cut off without warning nor tilt-back while going around 25km/h. Having read a lot of posts here, I assumed it was user error, maybe an uneven spot on the bike lane, maybe 80% battery wasn't enough for my speed. I was just happy I had a helmet and wrist-guards on, and managed to do a roll, so I only ended up with a slightly sprained ankle and a bit of road rash on my lower back. Until then I had ridden 7kms on that journey and had a pause of 2 hours before heading back and having a cutoff on the second minute of riding. The bike lane it happened on was separate from the road and despite that my EUC went on the road during rush hour. Thankfully there was a traffic jam and also it somehow managed to miss all the nearby cars. Yet, I couldn't help but think about the unsecured bike lanes I rode on shortly earlier that day and what could've happened at the wrong time and place - I'd rather stick to sidewalks and slowing down for curbs and pedestrians. I carefully rode the remaining 7kms home without any further issues. III. Weird low-speed tilt-back and cutoffs The following days I had short trips and casually rode around to see if I can trust my EUC after my first no-warning cut-off. Everything seemed normal for a week and just as I had written it off as user error I got some tilt-back while going around 5km/h. It was so unexpected that I thought I'm imagining things but I carefully finished my journey. Yet on the way back, an hour later, after 3 minutes of normal riding it happened again around 10km/h, this time leading to a cut-off after I stepped off, followed by 3 beeps similar to when it has fallen to one side and a 4th beep when it resets. I turned it off for a few seconds and back on and carefully rode home. I think it happened a couple more times for the remaining 2-3kms The next day everything seemed in order, I spent a good hour or so riding back and forth without issue ... until I went out later the same day. I rode 1km and again got the low-speed tilt-back and unstable floaty balancing. Only this time it kept losing it's balance, cutting off and resetting, even without me stepping on it, just by rocking it back and forth with my hand, in fact I couldn't push it with the trolley without it failing to balance. After I left it for a couple of hours I could at least push it with the trolley so I started wondering if it's something to do with the battery, despite it being around 70% Today I decided to go out so I can record videos of it failing, as well as to check current, etc in the EUC World app. I rode cautiously while recording video for 10 minutes without it failing. I turned it off for 5 minutes and tried again and this time it did it immediately. I went home, charged it to 100%, went out again and repeated the experiment, with it initially working OK but then cutting off in less than 5 minutes of slow riding. IV. This doesn't look right?? Since it started consistently failing despite the low speeds and fully-charged battery, I decided to open it up and look for some clues, even though I'm not knowledgeable in electronics. I got the first cover off and immediately saw this. I have no idea which connector is responsible for what, but it looks this one has come undone despite the glue/paste it was covered in. I would be very grateful for some information and advice: Should I just plug it in? Should the batteries be disconnected first? Do I have to unscrew the whole board? Do I have to watch out for something else? V. Edit/Update OK, so turns out this connector is for the USB and should be irrelevant. Still looking for a solution. I haven't checked out the capacitors/etc yet but will look into that. No obvious issues with capacitors, mosfets or wires that I can see, at least.
  2. I've been looking around and only seem to find good solid info on the 84v version. I have the 67v Mten3 and want to know if anybody out there has found a reliable top speed. I'm 150 pounds riding and usually get around 18mph before it starts beeping like crazy, but the wheel feels like it has more to give. Has anybody experienced a "high speed" related cutoff on this wheel? Lastly does anybody have recommended app settings for their 67v version? The gotway app as of this post doesn't work AT ALL, and frankly trying to adjust alarms on EUC world and Wheel log apps don't seem to do anything at all for the 18mph beeps. Thanks in advance for any help or insight!
  3. Firmware Issue 1.1.6 WARNING, NOT SAFE! CUT OFF if feet leave fotplates (see Yourube videos at bottom) Here is the list so far, PLEASE if anyone can do the "footplate test" (as on first video) on mainboard 1.1.7 and report if issue is solved. I would like to update mostly for the BMS, but I dont dare if the unsafe behaviour is still there. Lift vehicle while pressing on foot plate, wheels should spin as its lifted. Then release foot plate pressure. Wheels SHOULD free wheel to a stop - NOT STOP INSTANTLY by breaking like in 1.1.6 video. FW marked with * is the one I have now and includes my comments, other FW comments are from FW update screen *mainboard 1.0.8 - GOOD/SAFE, no cutoff if foot removed with wheels spinning (when off ground) - PROBLEM, adjusting steering sensitivity and ride sensitivity during an active ride, sent mine into steering freak mode and after stopping it was locked into left turn (constant turning). Turn back to "auto mode" again at standstill - problem solved, Now it can once again be set manually for sharper control (or softer if one likes that) - PROBLEM, tiltback and alarm at 19km/h in app - PROBLEM, 19-20km/h in app = 16km/h real speed (GPS show 16 when pushing it constantly) mainboard 1.1.6 WARNING, NOT SAFE! CUT OFF if feet leave fotplates (see videos below) mainboard 1.1.7 Optimized uplsope performance Optimized alarm in slope Other small known bugs MY WARNING - UNKNOWN IF SAFETY ISSUE FROM 1.1.6 IS RESOLVED *BLE 1.0.0 Ocasinal problems at "search again" (Huawei P8) BLE 1.0.1 IOS11 bluetooth connection fix *BMS 1.1.8 No known/noted yet BMS 1.2.0 Optimized cell balance function *Co-control 1.0.6 A bit confused when starting "not facing" remote Co-control 1.1.4 New function: - Optimized follow me performance *Follow 1.0.0 None noted, see co-control 1.0.6 Follow 1.0.X NO UPDATE AVAILABLE (have it been included in co-control in latest FW?) *Remote 1.0.3 None noted, remote and phone both work fine to remote control Remote 1.0.4 New function: - Fix that remote sometimes cant be charged - Optimize indication of remote control battery volume (level?) Gimbal N/A (dont have one) Likely this one also suffers from 1.1.6 FAST FORWARD to 00:20 for crash
  4. Cut-off on EUC is painful ,annoying , and unpredictable. And now, there is no black box for Electric Unicycle that can monitor and record what's going on out there for a cutoff. After discussion with our engineers, there are some self- dignosis procedures can be taken by yourself.(If you are not suffering from severe crash or faceplant, we suggest you to take a deep breath and run these diagnosis. ) How to dignosis on your own? First, after cut off, please check the battery indicator and see if it’s working. If it's working, please check out if it's balancing. If not, please check out the tire is able to spin. Second, reboot the wheel if you can, and check out if the wheel can be ridden again. Then, please let us know. You know where to find us. Marketing@imscv.com Service@imscv.com I'm upset to every fall and cutoff, and thankful for every case you guys reported to us. With more case reported, possibly, they will no more cutoff case on EUC. And everyone can benefit from it. Before that, don't forget to gear up before you ride. That's a must for any rider. Thanks Liam from Inmotion
  5. I asked the same question on reddit, but I'm interested to see what the forum people have to say. I know @Marty Backe wants tilting headlights, I would like to see suspension. So far some responses have been: -Waterproofing (I guess better since it's currently pretty splash proof, but mostly without official ratings) -Lighter wheels -Easier ways to change tires -No cut offs -Open source EUC controllers
  6. So back in the day most everyone of us rode the Ninebot One E+. No matter how hard I pushed the device at it's top speed despite the tilt back I was never able to get it to cut out. I did however manage to overlean the device by accelerating too hard. Was it my lack of skill back then to push my E+ beyond the max speed or is it that modern wheels don't have the same protection for riders to not reach cut out speed? Why can't the wheel just not permit the rider to go beyond a certain speed?
  7. 5 reported accidents so far. my friend included. 20 ish kmh on flat road and the wheel just cut power after a few seconds with on and off. his face is not pretty right now. Could everyone with the same batchnumber report in and also if you had a problem. thanks Moderator notice, June 24th 2017: Apparently motorcode is not a reliable way to know if your wheel is affected, the motors might have numbers going back to 2016 (like 1608) and still be affected. Basically if you've bought an MSuper, ACM (and/or maybe Monster) since sometime in start of May 2017, your wheel might be affected. You need some other way to establish when the wheel was built, apparently there's another code somewhere, maybe on the box it was shipped with. 1705 (2017 05, 2017 May) seems to be the magic number, basically any way to make sure that your wheel was or wasn't built after beginning of May. So far it appears that the software goes haywire after riding over a bump. For some riders, this has happened at low speeds, but others report it only occurring at high speed. The wheel is reported to start oscillating back and forth and cut out soon after (maybe in a matter of <0.5 seconds), leading either to crash or the rider jumping off. There seems to be no warning before it happens. Gotway claimed the problem was solved and sent out new replacement boards that should have been OK. That was not the case, the problems still seems to remain, only maybe with higher speed now? At the time of this writing, apparently even brand new wheels still have the issue. Suggesting everyone with the affected wheels to stay off them until Gotway has fixed the firmware for sure, and your dealer gets the equipment and the binaries required to flash a fixed firmware to the board (or new boards with new firmware). This video was shot by @Marty Backe with a board that was supposed to be fixed:
  8. So I was headed home afterwork and took a detour to grab a drink before I got home. Luckily from work to home is only a 10 min ride max. Why is that luckily? At night I ride in the road because it's not as unridable as the sidewalk (ironically) plus at around 11 at night, not many people are on the road. Well there was a car coming up behind me so I usually ride into the shoulder till they pass, but there was a fairly large puddle (it was raining still) I barely saw and ended up riding through. About a minute later, I got the tiltback warning (which I assume was me reaching top speed like always, yes I need a faster wheel, haha), began to slow down and recover cruising when the wheel performed an action like it was confused adjusting to normal riding then giving me a tiltback feeling very rapidly within 3-4 seconds before it cut off and I safely ran off it. I was devistated afterwards when I picked up my wheel to find it wasn't turning on. I had just replaced a tire after procrastininating for weeks so it felt like i was wheel less again. After walking about 10 minutes back to my house, I sat it next to a heater for a few minutes than thought to try charging it and lo and behold it powered up once I plugged it to the wall. Battery level was the same and everthing works like before. Weird experience. Thought it's worth sharing.
  9. Hello, French Wheeler, but not as good as some other, I had a bad accident (broken shoulder, now with some metal!!) with my small ninebot one E+... and I spent some time in order to understant why we face cut out or accidents. So, on the forums, I could recognize 4 kind of accidents : 1- Pilot did ignore alarm.... nothing to say.... too optimistic, 2- driving accident (bumps....), 3- Sudden cut off.... (looks like my accident, but I'm not sure it wasn't a technical failure), 4- Technical failure. Rare since construcors did improve the safety...or correct bugs (BMS for instance). For the point 3, I did some calculation, that shows that specification of constructors seems to be far too optimistic, and the speed alarm does not consider the wheight of the pilot... which has a huge impact. What I did consider is a common case of accident : you run on flat road, no alarm, straight... and you have a small slope (not big, couple of meters long!). So immedialtely, since you do not consider you have to slow dow, your Wheel has to give all power in order to maintain the speed during the slope. In this condition, considering a 10% slope (not big at all, it is a 6° angle road), what is the maximum speed you can run? I did consider air drag, which has a big influence over 30 km/h), the solpe that I consider as a safety margin, and the wheight of the pilot. The power was considered as constant whaterver the speed is (optimistic), and, since nobody know the duration of the peak's power, 0,5 second for this peak (which is only use for bumps in fact!). Yield of the Wheel in order to transform electrical energy to mechanical energy is estimated at 75% (tests on some gotways). What do we calculate show that with a 500 W, at 25 km/h, you're not save at all... except if you are a kid. On a gotway ACM our MS3, 45 km/h is not a realistic speed since air drag consume most of the power... What do you think? Conclusions : - Power, and slow speed is the key for safety... - Adapt speed limit cosidering your wheight, - If you want to keep the hight speed limit, go quiet, and in all case, use protections!!! Of course, this is only my caclulation, an you can disagree! EUC safety speed.xlsx
  10. Wondering if any 9 Botters experienced the crash while they had the trolley handle on the wheel. I plan to buy one but because of the protruding design I'm hesitant to buy... Do you think it is likely to survive in the crash?
  11. Hi, I'd like to pose a question to those familiar with or have technical expertise on motor/battery engineering - while the "official" word is that KS units do not cut off when pressed past their speed max/battery output, has anyone tested this theory? When I asked GW about their lack of this feature, per the GW rep, there is no such thing as an EU that does not cutoff after exceeding max speed/battery output. While the pedal-rising feature may discourage further pursuit of higher speeds, it doesn't guarantee the KS units have a smart feature built in to prevent cutoff. I just want to clear up any misinformation that may be present - currently what I have to go off of is GW rep vs KS rep but we all know that testing it is the only true way to find out - or thru understanding how these motors/batteries work. Per GW rep, the new units will have an optional pedal-rising feature selected via their app - this was intentionally done for a couple reasons: in a situation where high speeds are reached and a cutoff is imminent, flat pedals are actually better than rising pedals for a user to bail. Either way, it won't be pretty but the idea is that should your feet be in an angle due to rising pedals, you can't jump off. Another reason: if you practice safe driving near the max speeds, you don't have to worry about the annoyance of the rising pedals. Having the option I think seems the best of both worlds. Not saying that beeping isn't annoying, bc we know it sure is!
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