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trevmar

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About trevmar

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    Advanced Member
  • Birthday 11/14/1948

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  • Location
    California
  • EUC
    several MiniPRO (modified), Airwheel S5

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  1. @DalbsterMy MiniPRO units did the same thing to me. The last time my arm was out of action for 2 months. I was using a semi-flexible steering column, it made no difference to the MiniPRO> I bought Airwheels S5 units (their 1500W off-road units) and have had no trouble. Flawless. Slow (12KM/h), but a good complement to my 2400W scooter and Fat Bear Plus ebike. For a slow and casual ride around the neighborhood. I have four miniPRO in the garage for much the same reason as you are keeping yours...
  2. Maybe your older unit has lost the key-coding, and needs to be re-paired with a new coding. The YouTube video showing how to do that is here: https://www.youtube.com/watch?v=ceLkAwDZa7k The board on which the pairing switch is located is the power relay board, controlled by the remote control. So if you need to look further to get the S5 working, that would be a good place to start... The S5 has been discontinued, AFAIK, and last time I looked, it was not available on Flash-Ecom either. Incidentally, I notice that the Airwheel Aliexpress store is selling spare S3/S5 handle
  3. @Groundcrew Both my Airwheel S5's delivered in 2019 had exactly the same app board as in your second photo, tucked next to one of the speakers, which is missing (the newly delivered units only have one speaker). That app board continues working even after you unplug the board near the power and charging switch (between the plastic cover and the metal plate you stand on). That board near the charging connector connects your Bluetooth music to the speaker, and also delivers your annoying "don't go to fast" messages. Mine has been left disconnected
  4. I have no idea what an S8+ is, are you sure there is any difference between it and the S?. All I can see is that it has a >200 watt battery rather than a smaller one. The Chinese factories are sending me emails saying they are open for business again, even Shenzhen...
  5. This is the page I see the board at $49.99 plus $5 shipping: https://www.aliexpress.com/item/4000141072554.html?spm=2114.12010615.8148356.70.65c927b8kAmVnB But it may not be the motherboard which is faulty, it may just need a system reset. Airwheel used to have support in the USA but they were forced to close the US operation under pressure from the Segway patent holders (the Chinese Xiaomi company IIRC) a year or more ago. My airwheels have never broken down (or even reached any limits) so I really don't know what they do when faced with overload. The MiniPRO was easy to diagnose -
  6. In my experience the Ninebot MiniPRO products are not reliable enough for an application like yours. I have four in a corner here, shelved in favor of my two Airwheel S5. The Ninebot was breaking too many of my limbs... it is just not made for folk with a weight approaching 100Kg. Incidentally, I noticed that a new mother-board for the S8 is available on AliExpress for $49 plus a few dollars shipping. Typically, when a device like this fails it is taken to the local "bikeshop," which in China are located in every residential unit. I remember one in Chengdu which did its arc-welding on the
  7. I haven't had any problems with either of my (large) Airwheel S5's. Keeping Lithium Ion batteries running with for long life with plenty of charge is difficult. I would think you need, at least, a digital voltmeter. Also, the battery packs on these small platforms are too small, and if you are running the unit near its capacity for more than a few seconds, the battery voltage will fall due to the load you are putting on it. Also, the batteries will heat up as time goes by. Both of these can send the unit into a low-voltage warning. Wait a minute or two until the batteries cool down a
  8. Thommy, most modern lithium-Ion cells do not age so quickly if the charge voltage is kept below 3.96 volts (approx, varies from cell to cell). The biggest increase in life is lowering the charge voltage from 4.2 to 4.1 volts, where the life doubles for many cells (from 500 to 1000 cycles for 20% degradation). Every manufacturer is different, but it is a good general rule to keep the voltage on any cell below 4.1V and preferably below 4.0V, which for a 16 cell pack is 64.0V. One complication is that the BMS often is not precise in balancing the charge into cells, and it is recommended to charg
  9. If you don't need the final 15% of battery longevity you can charge each cell to 4.0V only. That will reduce the self-discharge and increase battery life. Best to keep battery more than half-full, don't let it empty out as this reduces battery life.
  10. The Bluetooth on MiniPRO is strong enough to bring on headaches, affect balance, etc, which is why I modified the antennas on all four of my machines using the modifications I posted earlier in this thread. Apparently you can also cut the power to the bluetooth chip, I have not looked into doing that. The antenna mods are sufficient to take the level down to the Bioinitiative safety level.
  11. I used silver paste on my heatsinks. The failures were not due to hardware, but to software bugs (firmware bugs). As @WEagle95 told us, the interrupts re handled badly, there is no handler for bus error, and every so often it will just fail. Depending how heavy you are and the terrain you are driving it on. I have had no problems with my Airwheel S5 (touch wood). It is slower, but solid...
  12. @ABEhrhardt MiniPRO has no gears at all, and it cannot supply enough torque to safely handle all situations the MiniPRO finds itself in. Consequently many riders have been thrown and hurt. There are several discussions here on that topic. What caused me to give up on the MiniPRO was when it shut off while going down a steep hill, throwing me and badly dislocating my shoulder. The machine was definitely not being driven outside its parameters at the time, maybe a low battery was the problem? In any case it hurt me without warning, and so I have changed to using the Airwheel S5, which has worked
  13. The miniPRO designers wrote a blog, which although in Chinese, translates well in Chrome or Google Translate. It is worth spending the time to read. The designers weight limit for the platform was 85Kg, and that was for the bigger battery pack. The higher limit came only from marketing folk. Take a look at the BLOG: http://bbs.ninebot.cn/forum.php?mod=viewthread&tid=4100&extra=page%3D1%26filter%3Dtypeid%26typeid%3D43 1/23 I weigh 90Kg, and have been thrown twice by the platform, which cuts off, apparently without cause. Both time my ligaments took months to recover (although
  14. While looking at eBikes I found that some are using the same sort of planetary gearbox internal to their wheel motors that the Airwheel S8 apparently uses. This overcomes the primary failure of the miniPRO, its inability to provide enough torque in emergency situations. eBikes which are fitted with these motors are rated to climb 30 degree slopes (eg Fiido D2) , while the standard motors are rated to 20 degrees.Yet the top speed does not seem to be affected much, it is obviously limited by law and battery power. issues. Here is a video showing how these motors work: And h
  15. The S5+ I was sent has much bigger tyres, and, I think, a bigger motor, than the version they made in April 2019. The tires are now 130/70-12 Tubeless, which are the same as many scooters use. It does have a good off-road pattern: https://www.csttires.com/int/tire/cm502/ The outside tyre diameter is now just over 19" and they look nicely wide as well. Unfortunately it won't fit through our front-door like the earlier S5+ version. But the tyres look really business-like...
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