Keith Posted March 7, 2016 Share Posted March 7, 2016 50 minutes ago, chrisinbama said: Just a note to say this just happened to me. How traumatizing! I took a swan dive into the concrete. What a ridiculous predicament! They need to take responsibility for this!! Well, don't keep us in suspense, what happened? What was the state of charge, etc? And just a tiny weeny bit important - on what wheel? Link to comment Share on other sites More sharing options...
chrisinbama Posted March 16, 2016 Share Posted March 16, 2016 On 3/6/2016 at 3:32 PM, Keith said: Well, don't keep us in suspense, what happened? What was the state of charge, etc? And just a tiny weeny bit important - on what wheel? Oh, sure. TG-M3 (from Banggood), 3 green lights battery charge. Was just practicing at my apartment, going back and forth on the landing, like I do all the time. I don't ride fast anyway, but certainly not in front of people's apartment doors. Just riding along and suddenly the motor shut off and the wheel nosedived sending me to the pavement. Never happened before, but it's fairly new and hasn't been ridden a whole lot. No way this kind of thing should happen. http://us.banggood.com/Wholesale-Warehouse-TG-M3-350W-Self-Balancing-Electric-Unicycle-88Wh-Top-Speed-18Kmh-wp-Usa-954070.html Link to comment Share on other sites More sharing options...
Chriull Posted March 16, 2016 Share Posted March 16, 2016 2 hours ago, chrisinbama said: Oh, sure. TG-M3 (from Banggood), 3 green lights battery charge. Was just practicing at my apartment, going back and forth on the landing, like I do all the time. I don't ride fast anyway, but certainly not in front of people's apartment doors. Just riding along and suddenly the motor shut off and the wheel nosedived sending me to the pavement. Never happened before, but it's fairly new and hasn't been ridden a whole lot. No way this kind of thing should happen. http://us.banggood.com/Wholesale-Warehouse-TG-M3-350W-Self-Balancing-Electric-Unicycle-88Wh-Top-Speed-18Kmh-wp-Usa-954070.html TG's were quite often shipped with bad batteries/chargers. So be carefull with charging/storing the wheel. 88Wh is by itself way too low capacity to drive safely up to 18 km/h - the battery back (supposely a 16s1p - 16 cells in series) cannot deliver the necessary power and the 350W motor is also quite at the limit. Best solution for you should be to put two ~150-180Wh high quality battery packs (*1) into the wheel (if there is enough space inside and a little risk that you maybe overpower the motherboard or the motor) or just keep this as training wheel and change to something with at least 300Wh high quality batteries (*2) and 500W motor. These wheels are just about the limit, where faceplants due to overlean/cutout get more seldom/(almost) stop to happen. Edit: (*1) Don't know how i came to two 150-180Wh packs... Maybe it's just too early around here With one 16s2p (16 cells in series, 2 in parallel->32 in total) pack around the 300-380Wh you should have a nice power source - and if there is enough place maybe two of these (and maybe again overpowering the motor/controlboard) (*2) These are the 16s2p packs. "Older" battery generations start with ~240 Wh, the newest are at about 380Wh. Only exception for this "rule of thumb" reported/previewed in this forum seem to be solowheel and uniwheel - They have "only" ~180Wh Battery pack and a stronger motor (~1000W), but use a different battery technology which can (could) provide higher peak loads to withstand overlean/cutouts... Link to comment Share on other sites More sharing options...
SlowJoe Posted March 16, 2016 Share Posted March 16, 2016 Unexpected shutdowns to me is a deal breaker. Than you for this post! Link to comment Share on other sites More sharing options...
SlowMo Posted March 21, 2016 Share Posted March 21, 2016 On 3/16/2016 at 10:16 AM, Chriull said: TG's were quite often shipped with bad batteries/chargers. So be carefull with charging/storing the wheel. These brands should offer free head protection gear as standard accessory. Link to comment Share on other sites More sharing options...
Nafallo Posted June 11, 2016 Share Posted June 11, 2016 Hi, Something is going on with my Airwheel X8, most likely battery ageing related. It keeps turning off randomly without tilt-back, and without being able to turn back on until after I've plugged in the charger. I'm after a new battery for it, but also a new wheel. Right now I'm looking at the Ninebot One P v2, but since that's not released, how would Gotway ACM 16 fare in subject of this thread? From what I've read elsewhere they have re-adjustable tilt-back and the cut off is usually when the rider is being stupid. Cheers Nafallo - new on this forum - rider since April 2015 Link to comment Share on other sites More sharing options...
Chris Westland Posted October 6, 2016 Share Posted October 6, 2016 On 7/10/2015 at 4:11 PM, esaj said: I'd at least assume that accelerating needs a whole lot more power than just keeping the speed steady. Telemetrics for the wheel would be really cool, I'd love to be able to see the graphs for power usage vs. change in altitude (ie. climbing/descending/going level) vs. speed etc. I actually was thinking of modding a voltage meter (and asked Vee73 if he knew of any good) to the front/topside of the wheel for the the new batteries, so I could see the change in battery voltage during climbs and accelerations (plus it would probably be more reliable battery meter than the 0-99% display of Firewheel ). Just needs to be able to show up to around 70V (more wouldn't hurt, in case I ever decide to try higher voltages), with at least 1 decimal after the point accuracy... plus I'd have to figure out how to power the damn thing, as it would probably still use different voltage, unless there are some that can use the voltage they're measuring, but that's going to change a lot. Let me suggest, if you are interested in telemetrics, that you use the existing Ardupilot system setup in APM:Rover mode. Set up a standard APM 2.8 APM2.8 (these are ~$35 on ebay) with Ublox NEO-M8N GPS , MAVlink (with bluetooth transmission and MinimOSD for customizability of reported parameters), DroidPlanner @ https://github.com/DroidPlanner/Tower on your mobile phone (which will hold the storage for data logging) or some other "Ground Control" software (see picture attached); and perhaps some bespoke analogue sensors for rotational speed, voltage and current which will be fed to specific GPIO on the APM board (A0 to A7 are both digital and analogue, so can read voltages) and their readings can be made available on the APM parameter setting software in APM Planner. You preload the satellite map images, or other map data, to the mobile phone from Google Maps (this is all pretty much automatic). I'd suggest a separate 12vdc power supply for the telemetrics system (LiPo battery) because motor control systems are so noisy. For $75 and a few hours of fiddling, you could get endless amounts of telemetry and graphics on your mobile phone. Link to comment Share on other sites More sharing options...
Luca Morello Posted November 15, 2016 Share Posted November 15, 2016 I have bought some unicycles on ebay. Tg similar to t3, with 350 W with Samsung batteries and with audible warning and slow down when the battery is low. I thought I was safe, but the other night with a charged battery, not used for 20 days, after a few meters has died suddenly. Luckily I was on the bike path. Is there a way to be sure that with unicycles? Or should I convert to other means such as hoverkart? Link to comment Share on other sites More sharing options...
Slaughthammer Posted November 16, 2016 Share Posted November 16, 2016 You did read the first post of this thread? It clearly states the TG wheels in the dangerous category. Get a wheel that is listed as at least possibly safe, and you should be fine, as long as you respect the limits of the wheel. Link to comment Share on other sites More sharing options...
MaxLinux Posted November 16, 2016 Share Posted November 16, 2016 On 3/16/2016 at 0:02 AM, chrisinbama said: TG-M3 (from Banggood) Prices swing wildly on Banggood sometimes, but I almost fainted when I saw this listed for $599.96 (88 wh battery and 350 W motor)! Link to comment Share on other sites More sharing options...
MaxLinux Posted November 16, 2016 Share Posted November 16, 2016 On 3/16/2016 at 2:16 AM, Chriull said: TG's were quite often shipped with bad batteries/chargers. I got TWO TG T3s with DEAD, UNCHARGEABLE batteries! The wheels (from 2 different sellers, purchased widely separated in time) were definitely brand new. In both cases I was able to convince the sellers (eventually, after much arguing) to send replacement batteries, and the wheels and their batteries worked great ever since. Link to comment Share on other sites More sharing options...
MaxLinux Posted November 16, 2016 Share Posted November 16, 2016 1 hour ago, Slaughthammer said: It clearly states the TG wheels in the dangerous category I've had 2 T3s and a F3 that I rode extensively and never had any problems (I still have them, but ride them rarely now). Link to comment Share on other sites More sharing options...
Luca Morello Posted November 16, 2016 Share Posted November 16, 2016 Everything is reduced to only three brands: the premise that it costs too much Solowheel Link to comment Share on other sites More sharing options...
Luca Morello Posted November 16, 2016 Share Posted November 16, 2016 The problem is not on bike paths, but but any overhang on the road to a car. Safer then the hoverkart Link to comment Share on other sites More sharing options...
Vik's Posted November 16, 2016 Share Posted November 16, 2016 4 hours ago, Luca Morello said: Everything is reduced to only three brands: the premise that it costs too much Solowheel I think you we can count Inmotion in as safe - seems that they got it right with their V5 and V8 models. Kingsong "overcharging" being mentioned a few times... Link to comment Share on other sites More sharing options...
HermanTheGerman Posted November 16, 2016 Share Posted November 16, 2016 10 hours ago, Vik's said: I think you we can count Inmotion in as safe - seems that they got it right with their V5 and V8 models. Kingsong "overcharging" being mentioned a few times... From personal (KS16 driver) and friends experience I count Ninebot, Kingsong and Inmotion in the "safest" category (Solowheel I do not know, it's not that much sold here), but none of the others yet. My KS16, when empty, don't let me entering it, or becomes so slow (besides beeping) at the end that I must get off. A few weeks ago in southern Tyrol, where I had to ride down a long steep hill from Eppan to Bozen, I forgot to plug it out over night before I left. After a few 100 meters it started beeping like hell and became slow, and I thought it was because of overcharging. So I rode up the whole hill again and then down, and then it worked (FW 1.23). So I can't say anything bad about overcharging. What have you heard ? Link to comment Share on other sites More sharing options...
MaxLinux Posted November 17, 2016 Share Posted November 17, 2016 On 11/15/2016 at 9:41 PM, Luca Morello said: the premise that it costs too much Solowheel Solowheel is falling seriously behind, in my opinion. Solowheel prices are far in excess of what is justified by the specs. Link to comment Share on other sites More sharing options...
Vik's Posted November 17, 2016 Share Posted November 17, 2016 1 minute ago, MaxLinux said: Solowheel is falling seriously behind, in my opinion. Solowheel prices are far in excess of what is justified by the specs. They trying to pretend they are Apple of electric unicycles but they really are not... Link to comment Share on other sites More sharing options...
Vik's Posted November 17, 2016 Share Posted November 17, 2016 13 hours ago, HermanTheGerman said: So I can't say anything bad about overcharging. What have you heard ? Last one that I could find is: It is albeit an overcharging by the charger. Link to comment Share on other sites More sharing options...
Luca Morello Posted November 17, 2016 Share Posted November 17, 2016 How do you change the BMS ? Link to comment Share on other sites More sharing options...
nute Posted November 17, 2016 Share Posted November 17, 2016 My brother has a Kingsong 16 which shut down on him so you may want to rethink the Kingsong = safe conclusion. Link to comment Share on other sites More sharing options...
Chriull Posted November 17, 2016 Share Posted November 17, 2016 9 minutes ago, nute said: My brother has a Kingsong 16 which shut down on him so you may want to rethink the Kingsong = safe conclusion. Imho by now or maybe never any wheel could be considered safe! Also gotways, inmotions and ninebots shut down on their drivers... This shall not be an excuse or advertisment for the ks16 - which i drive now after the ninebot, but they are by now like the others more or less "state of the art". with every new wheel/firmware versions of these companies sometimes some new faults are introduced but over the time improvements are noticeable. Imho also by the quite low quantities the quality control is not really overwhelming and it can happen to everyone to get a "monday wheel/lemon"... Also some shutdowns are just intrinsic to EUC physics and not avoidable - some next generation EUCs could/should/will hopefully soon implement smarter warnings. Link to comment Share on other sites More sharing options...
Luca Morello Posted November 18, 2016 Share Posted November 18, 2016 The only thing left is to always use the rope as beginners Link to comment Share on other sites More sharing options...
steve454 Posted November 20, 2016 Share Posted November 20, 2016 On 11/17/2016 at 3:32 PM, Chriull said: it can happen to everyone to get a "monday wheel/lemon" I think I got a wednesday wheel, over 250 miles and no cutouts, It has dropped me a few times though, while going too slow and hitting a two inch curbstone or root and it didn't have the torque to muscle over them without momentum or jumping up a little. But that's just rider error. Link to comment Share on other sites More sharing options...
Cerbera Posted November 20, 2016 Share Posted November 20, 2016 On 17/11/2016 at 7:41 AM, Vik's said: They trying to pretend they are Apple of electric unicycles but they really are not... Well they are in a way, because they invented the EUC in the first place, didn't they ? I'd want to get paid a bit more if it was my idea ! Too bad that doesn't really hold up in a world where everyone wants everything nice and cheap... Link to comment Share on other sites More sharing options...
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