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Showing most liked content on 01/23/2016 in all areas

  1. Couped up inside because of the blizzard so I made a quick video.
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  2. The unit is self-balancing, in other words it is compensating for for the riders leaning, in order to keep the rider from falling over. If the rider leans forward and the unit keeps a constant speed the rider will fall forward, its that simple.
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  3. The thing is, if you lean forward to go faster and the wheel does not go faster (doesn't accelerate) to stay under you, you will fall forward. The only way to keep the wheel from trying to go too fast is to keep the rider from leaning forward. Hence the tilt back.
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  4. Ok, I'll bite, although I probably shouldn't -- Tesla cars have mechanical brakes only because these are required by law and for emergency braking when the engine can't decelerate that fast. -- The mechanical brakes are there also because you can't use regenerative braking with full batteries, or when decelerating really fast, you can't push all the energy into the batteries. There's a smart brake control system that can apply either regenerative braking, mechanical brakes or both in varying degrees. -- Besides Teslas don'tshut off, don't tilt back and don't beep when y
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  5. Winter storm Jonas in NJ. My son's friend riding his Slowheel Classic... instead of cleaning the driveway, I guess
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  6. I installed a bike computer on my generic brand chinese 14" EUC. It's a quite simple mod. Here are some images of how I mounted it. Later I'll post a video to demonstrate how it performs.
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  7. I have a few things to contribute here - lets start with rapid acceleration and falling over - It takes a TON of torque to keep someone standing on a wheel, with the center of gravity so low upright. it takes even more torque to do that while moving. The faster you are moving, the less torque available to keep you straight up. Depending on your size, height, weight, etc... if you are going full speed and give a good push forward, there is a good change the motor does not have enough torque left to pull you back. When designing these things it's a trade off between performance and stab
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  8. There's so many things wrong in how Bat thinks these work and how the physics work, that I haven't even bothered to answer EDIT: This was a bit of trolling, I most certainly don't know everything about the motor control of these wheels, but I do believe I know enough to tell for example that claims like " they've used the battery electronics (which is often created by a separate company) to create beeping and tilt back" are nonsense.
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  9. With an electric motor you can have speed or you can have torque. You cannot have both simultaneously. When you are at maximum speed you have minimum torque. Torque is required to keep the pedals flat when you lean forward, it is also required to tilt the pedals back for the warning. The Ninebot cannot wait until you are at maximum speed to give a tilt warning because at that point it lacks the torque to tilt the pedals back. The only choice they have is to tilt back the pedals earlier as you approach max speed. However you can still overlean in many situations, for example if you attempt to m
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  10. Quote from Wikipedia: "When considering human-powered equipment, a healthy human can produce about 1.2 hp briefly (see orders of magnitude) and sustain about 0.1 hp indefinitely; trained athletes can manage up to about 2.5 hp briefly and 0.3 hp for a period of several hours." So one horsepower is 746 watts. 0.3hp would be 224W. If the regenerative braking was 100% efficient and if charging was 100% efficient and if you could maintain 0.3hp whilst pushing fast enough (as @esajmentions) to generate a voltage greater than the existing battery voltage and if the wheel being powered up to
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  11. That is a good point @OneWheel. Expected vs Unexpected. There have obviously been hardware failures posted that should not have happened when a motherboard, battery, or motor have had weak points. Those definitely need to be addressed. But again, there are still limits to what is Physically possible, so there will still be failures that cannot be designed out completely, even when Quality Control has been addressed properly, which it has not been up to this point.
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  12. Need to be aware. there maybe manufacturer employees posting bullshit here and disrupting a productive discussions. OMG!!$ hard earn money dont want it break down within 25miles or 30km or right out of the BOX!
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  13. A critical issue lost in translation like the democratic economy. Unexpected vs Expected shutdown. Unexpected shutdown is shutdown under expected normal operations. Expected shutdown is shutdown at operations near critical conditions. Let us all discuss only the unexpected shutdown. The tilt back, shaking. ALARM, and voice activations does not get activate under unexpected shutdown. What are the possible solutions to the unexpected shutdowns? Why are the manufacturers not implementing them? What can we (the consumers and dealers) do to obsolete these manufacturers? ...Once the unexpected
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  14. By the way @Bat, I don't believe we are trying to gang up on you, although the "Bull Shit" responses would be deserving of it, but we are trying to explain why Physics limits what an Electric Unicycle (Or Manual Unicycle for that matter) is able to do.
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  15. That's great news for the honest companies ! This started out with broad brush news reports blaming lithium batteries in general and it seems the focus has correctly identified low quality counterfeits as the problem . Now we have to wait for them to figure out what's what . Maybe I will see my EUC ......... In the spring ?
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  16. http://www.theverge.com/2016/1/20/10797106/feds-customers-hoverboard-smuggling It wouldn't surprise me if most of these hoverboard fires are specifically due to fake batteries. Most of the big name EUCs seem to use good quality batteries, let's hope this doesn't mess up their reputation as well.
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  17. Hi all, Thank you for inquiring about me. I'm well and always riding my Firewheel. I force myself not going on the forum for the moment, to have more times to make goodies for the wheel. For whatever reason, the forum's PM don't make email notification of new messages (other forums do), thus no timely reply from me but you can contact me through my blog (see signature below). I am still sending Charge Doctors and a new version (CD-2) is coming out... this weekend, I'll post pictures of it. I can ship only 4 or 5 of the CD-2 for the moment, I am waiting for manufacturing of
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  18. The results of all of this means I'm now very confident that I will be able to charge at 4A with no ill effects. The charging wires can handle it, the BMS can handle it and the batteries can handle it. Next steps are to try and use the high current charger limited to ~1.9A like the stock charger to make sure I am seeing the same behavior from the data captured. Then I will ramp up the charging an amp for the next time and if it does good, ramp it up to 4A.
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  19. Be aware of the Charge Doctor's current limit. Don't do like I did and use it on a high amp charger. It held for a bit, but then magical smoke
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  20. I don't think anyone is defending a system that does not work. We're defending Physics. Tesla has Mechanical Brakes. How would you implement those on a NineBot? If you simply cut power to regenerative breaking, that means it freewheels. That's what is currently happening, but you are not happy with that. What is the solution? And remember, it only has ONE wheel. They Try. It's called Tilt Back. Anything else is called Magic. This whole hobby IS Prototype. You are involved in early development, and as such, things need to be improved, as they have been, and will
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  21. Specifically 3-pin gx16 as shown here: http://www.ebay.com/itm/2sets-GX16-3Pin-Aviation-Plug-16mm-Male-Female-socket-Panel-Power-Chassis-Metal-/321248198455 gx16 come in other pin combinations as well, 4-pin, 5-pin, etc.
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  22. i think it's gx16 for most unicycles, not sure about ks
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  23. What overlay do you used in your video showing speed and tracking?
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  24. Did some quick editing on some old footage today. Here it is:
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  25. Talking about doing the right thing for the wrong reason. I am so desperate to get more mileage out of my wheel, i have figured there is no other way but to reduce my weight. I seem to have gained about 3 kg in the last 4-6 weeks!! And i dont like where this is going. So as of today i am an a weight loss program. The scales are telling me I am 103kg! I have to be 90kg in 2 months - this is my goal. I will also be able to record the riding distance increase based on weight. i did this before 4 years ago and i lost 45 lbs in 5 months. If i did it then i can do it now. I actually know
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  26. Better to check that the polarity is correct before plugging it in, if memory serves, there might not be a reverse-polarity protection diode in the GW BMS, and if there's not + the polarity is wrong, you're basically short circuiting the battery through the charger -> a very bad thing. Be very, very careful if you choose to go this route, and double check the polarity before plugging. If it's wrong, the batteries might blow up in an instant. Safest route is not to even try it Other than that, 4A should be fine with the large battery packs of the GW18 (there's 4 or 5 packs there, right?
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  27. Yes, probably you will get a little charge from that, but not much (ie. you'd have to push it for a loong, long time to fully charge it from almost empty ). And as the wheel has to be turned on at the same time, it will also use some power to stabilize itself (but not much, few tens of watts maybe?). The question then is, if the charge got from pushing is more than what it is using at the same time (maybe, but I still I won't expect it to be much). If you tilt the wheel even slightly forwards when pushing it with the trolley handle, it's actually using power, as the motor is being run to
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  28. 1 - High frequency sounds do NOT adversly affect health as long as they are not above a SPL that can be damaging. This is not the case with the ninebot and this fact is true for ALL frequencies. I'm not sure where you got this, maybe you made it up to make a point? For the record, I have a degree in acoustics. 2- Why would they have to do something when there is no issue? I updated to 1.3.5 immediately. I only hear the high frequency sound in very quiet surroundings, otherwise it is unnoticeable. The noise must be a result of a change in PWM frequency. If the engi
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  29. Charge Doctor is rated for 3amps max (if memory serves), although I think hobby has been building a higher amp-version of it. EDIT: Hobby's back from dead and new model is being built with up to 10A max:
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  30. Just received a late model Dec 2015 Gt14 and this thing rocks....I couldn't get the app to work with this model,(tried for 3hrs so I contacted the company and they sent me the latest rockwheel app, and it's in english too!!! Whoo, hoooo, it connected without issue and works great, I'm going to attach the apk file to this post if that's possible, enjoy! RockWheel_1203.apk
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  31. Soon to open .. http://electric-scooter-shop.com/?doing_wp_cron=1453530630.2245221138000488281250
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  32. The new motors with heavier stators are more in weight. It comes all together in the end.
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  33. All wheels are Potentially affected by this. Is it awesome? No. But there is simply NO way to prevent all shutoffs. It's a Single Wheel being balanced by a High Power Motor and Battery. It's a dangerous sport, if you don't ever want to be hurt, don't even think about stepping onto a single wheel vehicle, or a Motorcycle, or Skis, or Skates, etc... There is a LOT of energy to control here. They have to make choices during design. Either shut off when someone pushes past the recommended design limits, or allow the wheel to burst into flames. I think they made the right choice. It's
    1 like
  34. Perhaps this brings us back to the possibility of using the GEN 2 hardware since the GEN 1 as I had posted a while earlier is an outdated and in efficient design in running the EUC. I've finally finished putting the board schematics together. Here is a sneak peak. I'll post the schematics into the hardware forum after I make a few more corrections and modifications. I still need to route this board. But i'm waiting for feedback as well as improvements and added features before I waste my time doing that. Great work so far on the firmware . Regards, Mo
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  35. We had a very nice beach ride... The next one will be apparently through the snow if we are not flooded by Jonas
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  36. type 'twin' into the search box at the top of the page and you will get just that. Here are a few mentions of it.
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  37. To answer the question, we need either ask KS or open one of the shrink wraps and figure ourselves out. I did open the 680Wh pack of a KS-18A that might be relevant to KS-14. There are four protection ICs(SH367004) with balancing function. From the Chines datasheet(English version not found), it says if the voltage of any cell reaches Vob, it will start the balancing function for the cell. I did measured the voltage and it start at 4.20V. (Vob is programmable anywhere from 3.1V to 4.4V in 50mV step, and the balancing action is pulse modulated.)
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  38. Getting a longer range is one thing the second benefit is you would get better performance under high power demands and it is always recommended to get the highest capacity battery that you can afford. The 260wh version has china made batteries while the 340wh version has imported Sony batteries.
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  39. Today I heard a new one. An 65-70 (quick guess)-year old guy crossed me in the other direction, looked at me and yelled: "What kind of crap is that?", shook his head and continued along his path. Made me laugh. (In Belgian West-Flemish dialect it was literally: "wa bucht is da")
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  40. I just put the same Best Grip 1000 studs to Lhotz stock tire - tire is thick, so it's safe to install these studs to this depth. Maybe, when I change the tire, find out that even deeper is ok. And I plan to fit MEFO mousse to replace the tube later. I didn't put any studs in the mid section, now, without rider no studs touching the floor so it's more convenient with trolley handle at stores. There is -33 Celsius outside at the moment, 15cm snow packed to app. 2-3cm everywhere I need to use this, I think it's ok for commuting my 1.2k.
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  41. Goofing around with quick acceleration and juggling (not that the same time).
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  42. no not that hard, with 2 euc you dont need to balance left/right and you can stand still without falling over. corners or curbs are a bit harder to coordinate, but going straight is quite easy. in fact easier then riding on a single leg, as you have much less pressure on your calves. edit: rats ... somehow my friend found out about the last video where i teased him ... so he blackmailed me to post my last crash ... still dont know why, since then, he keeps telling me "do the turtle again, do the turtle again" .... looked worse than it was, no injuries as i alw
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  43. There are three packs in the KS-18A I opened, the charger charge the first 340Wh pack, the output goes to the charge input of the second 340Wh pack, and the output of this pack connected to the charge input of the 680Wh pack. The output of the 680Wh pack goes into the mainboard. The output of all these three packs are all 67.2V max. I opened the shrink wrap of the 680Wh pack as well, there are 64 Panasonic NCR18650PF cells in 16s4p connection.
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  44. I received zero 340 ...!!!! . I am very happy and I must say that Tony was perfect .. I started right away has created protection .... who knows how many times to fall for the ground .. !!!!! That is the result... NOW I NEED ADVICE ...... What you say is fine protection ?? then tonyy me iviato to email files to unlock ... as they load ...!!!! . I have an iphone and an Imac .....
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  45. UPDATE 1/18/16: So it's been a few weeks now since I've gotten my KS-14C. I can say that I am IN LOVE with the EUC hobby. I can ride fairly proficiently now and was able to get to about 15 MPH yesterday on the unit. I have uploaded a Youtube video showing off a couple minutes of pretty lame riding, but riding that I never thought I would be able to do a week ago: Just today I decided to buy the IPS Lhotz 340wh from Amazon. I chose this for a few reasons: 1. The LHOTZ seems to be pretty well reviewed, so I was comfortable with the qual
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  46. Exactly a year ago .. I climbed for the first time aboard the EUC. (Video is not exactly my first impressions, but allmost) Exactly one year ago, I had to use the back support, and a walking stick that I was able to walk. I was 7 years serious illness which took all of my muscles. Nearly killed myself, because I'm too tired to move anymore and I do not live. A little over a year ago we found a cure. A year ago, I decided that I learn to drive EUC and rehabilitates it myself. All I knew thought I was crazy when I tried to learn the EUC without musc
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  47. Hi, Thanks again Speedy for the review. I received my wheel and am very happy with it, although of course I've never owned another model so I can't compare to other brands. I find the construction very sturdy, and clearly the wheel packs a punch. I can't comment on maneuverability as I can't ride properly yet, lol. Both apps provided by speedy connect to the wheel. The Gotway app seems to have more options as far as different modes go. Not sure about all the differences between all the different modes. I asked a friend to solder the battery board for me as per Speedy's advice,
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  48. So the time has come for the world to finally receive a proper review of the Rockwheel GT14, and it really does deserve a review! First of all: This is currently NOT the wheel for someone who wants to unpack their new wheel and ride without any worries, however, it has a great value-for-money (may be the best) for those who know their way around a screwdriver and a solder iron First impression of product&company: So I had not owned a Rockwheel, nor had I tried it before this one. Because of the problems with the geared versions, I was skeptical towards the brand, but the GT14 was supposed
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