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Found 9 results

  1. Today I was riding my V8 on my daily commute like I've been doing it for 2 months. I was around 15mph on asphalt flat terrain, when suddenly the inmotion v8 gave up and I went body against pavement. It didn't play any different warning sound it just suddenly didn't do anything. As I've had a couple events where the wheel slowly titled completely and now gave up totally, is there a data logger where I can retrieve the wheel facts of the issue ?? I really want to know if something failed, overheat, frozen, over-speed. I can't really trust it, this thing might be trying to kill me. Maybe it has a buggy firmware, this device must have a log memory that logs every event and then later be retrieved, just like a tesla car. Facts: As I dragged myself to grab it out of the road I noticed the blue lights were still on. Temperature this morning 30 degrees Fahrenheit. About -2 celsius. Battery was probably around 92%. I do full charge at home and I had only ridden about 1.5 miles. I've set its max speed to be 19mph so the wheel beeps at 16mph and start tilting back. Not sure if it's even possible to go to 19mph as it plays the warning sound and tilts back. Yes, lots of cuts, lacerations and pain. Lucky is winter and I was riding with a big jacket. Not sure if I had any major complication as I'm still waiting for the pain to go away. Please let me know how do you guys troubleshoot falls, if I can retrieve logs it will be very useful.
  2. Yesterday I was looking for a helmet but not decided yet about witch one buy. On that night I go for a easy ride what comes into a huge scare. And hugest was my surprise for saving the logs trap with one single scratch in the arm from one log, no faceplant and anymore scratches. Happy for my luck (or reflexes) for saving my head, I go to buy a nice helmet right now. Here is the video I was recording then https://quik.gopro.com/v/h20mg6yRVZ/
  3. Haakon hoelseter

    MSuper v3s+ cut-out

    So i just got my new MSuper v3s+. I wanted to test how fast i could go before the final alarm kicked inn. I was accelerating slowly waiting for the last alarm to kick in when suddenly the wheel cut out and i went tumbling. I made sure that i turned off the two first alarms, and tiltback off. After thinking about it i decided to try again with tiltback set to 42kmh 26mph. And my phone in my hand to check the speed. Maybe i did about 500m before it cut out again, this time going 39kmh, or maybe i hit the tiltback at 42kmh. My memorie is a bit hazy. I used the iphone app as it is the only app capable of changing the setting permanently right now. Anybody else experienced this? I am wondering if the problem is the wheel or the app. I did test that the alarm and it works when i pickup the wheel. the second alarm also worked when driving. I am sending it inn to the reseller so they can have a look at it.
  4. Paco Gorina

    Breaking crash analysis

    Last day I submitted the Ninebot One E+ to some breaking tests for a project. The idea was to test it against a bicycle to and compare the negative accelerations so we have data for a negotiation with the authorities proving that EUC’s may break as fast as a bicycle. By the way, they are. I connected 9BMetrics and started to make hard breaks. Everything was going fine when in a breaking the Ninebot suddenly cuted current and I was ass in the pavement. Fortunately I already have that outcome into account and was protected enough so not a big problem. Afterwards the Ninebot didn’t start till I disconnected and re connected the battery. Perhaps someone may explain this. So now it begins the forensic analysis of the 9Bmetrics Recordings. I have loaded all the recording in 9BMetrics .9bz format to Dropbox. It is just a .zip that has .csv for each magnitude. It is available at : https://www.dropbox.com/s/bslxvdivd07se6s/20161130_202301.9bz?dl=0 Well, first considetation is that all was fast, fast, fast. Here we have a graphic of the last moments. Angle scale is in the right axis. Other magnitudes correspond to left axis, Speed in km/h Current in A and Pitch and Roll in º. From starting to break to end of the event was less than a second. When sufficiently enlarged the development of the crash shows things were not as simple as a cut. My interpretation of the sequence of events is as follows: Time Event 221.5 Start of Breaking. Pitch begins to increase because I push hard on the rear of the paddles. Speed continues to increase and current begins to go down to negative values as the controller tries to maintain the paddles horizontal. 221.8 Pitch increases less (but continues increasing). Controller begins to reduce and stop current decrease. 221.9 Controller has reversed current flow and compounds with my torque and pitch jumps up. 221.8 I reduce push out of equilibrium and fall. Without my weight pitch recovers a little but the controller continues to jump current up so eventually continues to drive pitch up. 222.13 Finally, the controller begins to reduce current. There are some changes that are reflected in speed 222.21 Wheel begins to oscillate in roll direction 222.43 Current is cut for some reason but current was already going to 0. Anyway, stability is already compromised and fall of the wheel is inevitable. That’s just an event but my first interpretation is that the sudden increase in pitch (or the sudden change from pushing in front to rear) has been too much for the controller that has been driven out of its stability zone and has begun to oscillate as feedback system do when they have a too much gain. Power may have been cut by either the mainboard or the BMS (sorry, didn’t have a voltmeter then to measure voltages) due to the sudden increase to more than 50A. That is about 3000W !!! What do you think? Do you have other registers that may help to understand those types of failure? Once again I was testing heavy breaking so it is not easy to find ourselves in this situation if we don’t look for it. I did previous breakings with negative accelerations of 0.7g while usual ones when driving are from 0.1g to 0.3g and had no problems.
  5. Tomek

    MCM4 hard rockin'

    so i was just riding my mcm4 to work, getting all over confident with the speed and taking over all the cyclists (20-25kph). while going uphill (5%) the wheel started beeping (i have first and second beep disabled, so it was the three beeps alarm) so i slowed down a small bit.. accelerated a bit again, and all of a sudden it started rocking VERY hard back and forth, basically throwing me off the wheel (there's no way anyone could stay on it like that). luckily i managed to run off, and there was no one in direct proximity (wheel took some serious scratches though). Has anyone experienced this before? it scared the hell out of me (and could have had seriously bad consequences)
  6. Hi, so after my fall today I found and joined this forum to see gather your opinions as to why my ninebot was dysfunctional I was riding on my ninebot for about 30 min or so hitting max speed several times. But the last instance after I hit max speed, it beeped but then quickly gave out and I had a pretty nasty fall. Usually when a person hits max speed on the ninebot, the machine pushes back on the balls of their feet and makes them slow down.This time it did not do that. I am not new to the ninebot and have been riding for about 6 months without a crash. I thought I dislocated my shoulder but thankfully everything was ok except for cuts all over. I just do not know why this happened. Now I am hesitant to ride it again and to hit max speed. Any reason why this could have happened? any remedy or fix for this problem? Thanks for you time and help, I look fwd to your replies! H.
  7. Hi, so after my fall today I found and joined this forum to see gather your opinions as to why my ninebot was dysfunctional I was riding on my ninebot for about 30 min or so hitting max speed several times. But the last instance after I hit max speed, it beeped but then quickly gave out and I had a pretty nasty fall. Usually when a person hits max speed on the ninebot, the machine pushes back on the balls of their feet and makes them slow down.This time it did not do that. I am not new to the ninebot and have been riding for about 6 months without a crash. I thought I dislocated my shoulder but thankfully everything was ok except for cuts all over. I just do not know why this happened. Now I am hesitant to ride it again and to hit max speed. Any reason why this could have happened? any remedy or fix for this problem? Thanks for you time and help, I look fwd to your replies! H.
  8. 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?
  9. Kristoffer Pehrson

    Battery replacement

    Hi! Does anyone knows where I can find a replacement battery for my unicycle? I have had problems with my unicycle where it has just died during a ride leading to a crash This has happened a couple of times especially when the weather is cold. Has anyone experienced this problem? I believe that it could be the battery that is the problem and now I'm looking for a replacement.
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