Jonathan Tolhurst Posted July 15, 2017 Share Posted July 15, 2017 Yet another Ninebot E+ board burnout (I think I'm on 5 or 6), luckily I have a spare control board which I grabbed from an old wheel whose rim fractured Looking at the photos below, can anyone explain what parts may have burnt out here and why? I seem to remember a previous burnout affected the same area on the board. The MOSFETS appear to have been unaffected - there was no lock up of the wheel movement. Interestingly, this control board died at very low speed and when not doing tricks - maybe some solder came loose and caused a short? I'm pretty please how long this board actually lasted - it's survived better than my shins 2 Quote Link to comment Share on other sites More sharing options...
Popular Post esaj Posted July 15, 2017 Popular Post Share Posted July 15, 2017 Looks like a couple of SMD-power resistors burned next to the ground-wire from the battery, might be for measuring the total current through the motor (the thick trace appears to come from behind the mosfets). If the board's otherwise OK, those should be pretty easy to replace. Not sure why they've burned though, it takes quite a lot of heat/current to destroy them like that, bad contact raising the resistance? 6 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted July 15, 2017 Share Posted July 15, 2017 Aren't E+ boards kind of rare nowadays? What's your plan if you can no longer get a new one? 2 Quote Link to comment Share on other sites More sharing options...
Jonathan Tolhurst Posted July 15, 2017 Author Share Posted July 15, 2017 2 hours ago, meepmeepmayer said: Aren't E+ boards kind of rare nowadays? What's your plan if you can no longer get a new one? Speedyfeet had them in stock until recently and should be getting a resupply in a couple of months (assuming they are still available). I do wonder how much the control boards cost Ninebot to manufacture - I'm pretty sure they (and the supplier) are making a pretty tidy profit selling them at £150 a time, although I expect that they replace a large number under warranty. Not sure what I'd do when I'm no longer able to maintain my wheel (I'm continuously replacing parts), I have invested lots of time practising to become "at one" with my wheel, I'll have to weigh up my options . One of the biggest selling points about the E+ was that it was really well build, parts were readily available and you could maintain it yourself. 1 Quote Link to comment Share on other sites More sharing options...
Hunka Hunka Burning Love Posted July 15, 2017 Share Posted July 15, 2017 Maybe consider going to InMotion? @Hirsute seems to find them pretty suitable. I thought he was going to post a video of the V8 that he won in the great EUC contest, but that never materialized. 1 Quote Link to comment Share on other sites More sharing options...
esaj Posted July 15, 2017 Share Posted July 15, 2017 (edited) 1 hour ago, Jonathan Tolhurst said: Speedyfeet had them in stock until recently and should be getting a resupply in a couple of months (assuming they are still available). I do wonder how much the control boards cost Ninebot to manufacture - I'm pretty sure they (and the supplier) are making a pretty tidy profit selling them at £150 a time, although I expect that they replace a large number under warranty. They seem pretty low cost... Lizardmech pointed out that they've even skipped proper gate-driver chips and built them from discrete components instead. Saves maybe a buck or two per board? Apparently no current sensors either, only shunt-resistors, the chips next to them might be something like op-amps for measuring the voltage drop over the resistors? Bluetooth-chip is on a breakout (the kind you get for $2 from Aliexpress), but that seems to be the case with pretty much all wheels... the gyro/accelerometer is on a breakout too, I bought some MPU-6050 -breakouts for maybe 2-3€/piece, but those are not the same as the NB1-board. But, in general, they've seemed to hold pretty good, many people have got thousands of kilometers on their NB1's... Edited July 15, 2017 by esaj 3 Quote Link to comment Share on other sites More sharing options...
Rehab1 Posted July 16, 2017 Share Posted July 16, 2017 13 hours ago, Jonathan Tolhurst said: Speedyfeet had them in stock until recently and should be getting a resupply in a couple of months (assuming they are still available. Same time frame Ian told me last week. In the US the sale of Ninebot boards to the general public has ended. I had to send in my grandson's NB1E+ last week to Ninebot US for repair. I wanted to purchase just a board from the company but No Can Do. Their site has this policy posted about why they will not sell directly to customers: The Main-Board (Control-Board) is the brains behind the brawn The main-board, or as some call it the 'control-board' is the “brains" behind the brawn of your Ninebot One. If it’s not functioning properly that means you're not happy . . . or riding! Due to warranty and safety concerns, we can not ship Main-Boards, or Control-Boards directly to customers. This item must be installed by a certified Ninebot repair service center. 2 Quote Link to comment Share on other sites More sharing options...
Rehab1 Posted July 16, 2017 Share Posted July 16, 2017 15 hours ago, Hunka Hunka Burning Love said: Maybe consider going to InMotion? @Hirsute seems to find them pretty suitable. I thought he was going to post a video of the V8 that he won in the great EUC contest, but that never materialized. @Jonathan Tolhurst has developed such an amazing sensory proprioceptive feedback with his NB1 that changing wheels would have a major impact on his skill level. An example is the penny spin and the exact timing it takes to perfect this trick. Another wheel would have different characteristics. He would have a huge time investment reteaching his body to learn all of the new idiosyncrasies along with the possible damage to a new wheel. I am sure he has damaged numerous NB1s throughout his years of training. 1 Quote Link to comment Share on other sites More sharing options...
Hunka Hunka Burning Love Posted July 17, 2017 Share Posted July 17, 2017 (edited) Yeah I get that, but judging by his talent I'm sure he would be able to adapt? I guess I'm just thinking if the Ninebot is eventually going the way of the Dodo bird what options can he consider looking at? KS16S is pretty heavy. I don't know if he wants to go to a KS14 sized wheel, but that might be an option as long as the new axles are stronger. It looks like Hirsute started on the KS14 and moved to InMotion. V8 might be too heavy. ACM is pretty wide and heavy. V5F+ might still be the way to go. Edited July 17, 2017 by Hunka Hunka Burning Love 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Hirsute Posted August 7, 2017 Popular Post Share Posted August 7, 2017 (edited) On 15/07/2017 at 10:23 PM, Hunka Hunka Burning Love said: Maybe consider going to InMotion? @Hirsute seems to find them pretty suitable. I thought he was going to post a video of the V8 that he won in the great EUC contest, but that never materialized. Really sorry about that. I thought I would make a video with the V8, but I never did it. I was very tired and disapointed by some critics that i received after the contest, and so i felt the need to moved away for a time from the EUC community and the forums. Otherwise my wounded arm is healed, and I started the circus tour again (in addition to my work for New Walkings...). Edited August 7, 2017 by Hirsute 4 Quote Link to comment Share on other sites More sharing options...
Hirsute Posted August 7, 2017 Share Posted August 7, 2017 On 16/07/2017 at 2:15 PM, Rehab1 said: @Jonathan Tolhurst has developed such an amazing sensory proprioceptive feedback with his NB1 that changing wheels would have a major impact on his skill level. An example is the penny spin and the exact timing it takes to perfect this trick. Another wheel would have different characteristics. He would have a huge time investment reteaching his body to learn all of the new idiosyncrasies along with the possible damage to a new wheel. I am sure he has damaged numerous NB1s throughout his years of training. I agree with you @Rehab1. And i am not sure that the penny spin is possible at all with an other wheel. I would like to see it on other brands, but it seem's that it is a NB1 tricks! 1 Quote Link to comment Share on other sites More sharing options...
Mono Posted August 8, 2017 Share Posted August 8, 2017 17 hours ago, Hirsute said: I was very tired and disapointed by some critics that i received after the contest WOW, I am very sorry to hear that. I really don't see any point why one could criticise you for having made this awesome vid, so many people enjoyed! It was pure jealousy wasn't it? 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Rehab1 Posted August 8, 2017 Popular Post Share Posted August 8, 2017 17 hours ago, Hirsute said: Really sorry about that. I thought I would make a video with the V8, but I never did it. I was very tired and disapointed by some critics that i received after the contest, and so i felt the need to moved away for a time from the EUC community and the forums. Otherwise my wounded arm is healed, and I started the circus tour again (in addition to my work for New Walkings...). Welcome back buddy! Your presence is always welcome! We both took criticism throughout the contest last year but the judgments cast your way were so unfounded I had zero enthusiasm to sponsor another event this year. For those members that missed your outstanding performance here is an encore! 4 Quote Link to comment Share on other sites More sharing options...
Eddie Veevaert Posted July 4, 2018 Share Posted July 4, 2018 What are the replacement parts for the pieces by the main power terminal that fried? Same happened to mine with lest than 50 miles. Quote Link to comment Share on other sites More sharing options...
Daniel Burkemper Posted July 5, 2018 Share Posted July 5, 2018 My board did this same thing about two weeks ago when my friend wiped out on it. I had a board replaced before under warranty, but cannot justify shipping and repair costs (~$280) to repair this old wheel with the new ones on the market. I just ended up buying a used one from @Joker10 so I will have the E+ and S1 until the Z10 is availiable. If anyone knows the rating on those resisters, I can solder them on and see if that was the only issue. I do have some wheel lockup, so do I have bad mosfets too? Quote Link to comment Share on other sites More sharing options...
m.s.g. Posted July 5, 2018 Share Posted July 5, 2018 I see a few Ninebot One C+ board available for $100. Would it be possible to pick one of those up and use that russian re-flashing method to change it to an E+ board without much drama? Quote Link to comment Share on other sites More sharing options...
esaj Posted July 5, 2018 Share Posted July 5, 2018 (edited) 1 hour ago, Daniel Burkemper said: If anyone knows the rating on those resisters, I can solder them on and see if that was the only issue. Trying to see from that picture (right click -> "Open image in new tab" to see it in full size with Chrome, probably something similar for other browsers), they're either 1 or 7 milliohm resistors, 1 would make more sense, but not sure... Could be 2512's (imperial), as they need to withstand high power dissipation? Quote I do have some wheel lockup, so do I have bad mosfets too? Possibly, the wheel should rotate freely. If you can disconnect the motor phase wires, and the motor then turns freely, certainly something's shorting the motor phases, usually it's one or more dead mosfets. Edited July 5, 2018 by esaj 2 Quote Link to comment Share on other sites More sharing options...
Eddie Veevaert Posted July 5, 2018 Share Posted July 5, 2018 a google search for r007 (the two missing off mine) came back as a strip or current resistor. 7mill ohms. Think these are the for sale here: https://www.mouser.com/ProductDetail/Susumu/KRL6432E-M-R007-F-T1?qs=FG09h9tFCuA5fgBuyupdEw%3D%3D&gclid=CjwKCAjwg_fZBRAoEiwAppvp-XCHACRb8I68BfsrZCQqlPy_OV0ZjsJ1nKpklIhy9lh-1yTJlO4ZQRoCSeQQAvD_BwE Quote Link to comment Share on other sites More sharing options...
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