Jay Barnett Posted August 2, 2015 Share Posted August 2, 2015 Hi everyone. I have a generic 500w 18km/h EUC.I recently bought a 30 km/h control board to see if I could upgrade the wheel to give it a higher top speed.Its almost worked. I found the correct sequence for the hall sensors and all leads are connected and new board is installed vertically as instructed.Only problem is the calibration. This board has bluetooth and no calibration points on the board.Calibration is done in the app, but the app is in chinese and i cant read it. I found a partial translation but even that is confusing as I still havnt been given clear instructions on how and when to press the calibrate buttons.It appears to be stable at vertical. I can lean it forward or back and it moves in that direction and ive even got on and rode a short distance.Trouble is when riding the pedals lean forward about 15 degrees and stay there while riding so i cant stand up straight.So its not really rideable as this lean is too close to the cut off angle.Heres some pics.And here is where I bought controller with instructions.http://www.alibaba.com/product-detail/controller-for-electric-unicycle-with-bluetooth_60244443124.html?spm=a2700.7724838.35.1.fs4wjj My wheel is generic, supposedly 550w and I bought it from here:http://www.dhgate.com/product/wholesale-joyewheel-newest-item-electric/213373049.html#s2-23-7|4222809817 Any advise or help would be greatly appreciated! cheers jay Link to comment Share on other sites More sharing options...
Jay Barnett Posted August 2, 2015 Author Share Posted August 2, 2015 This is the problem with my wheel. Leans too much in both directions but can handle my weight and moves.. but too close to cut off point for lean. Help! Link to comment Share on other sites More sharing options...
EUC Extreme Posted August 2, 2015 Share Posted August 2, 2015 Will it continue in exactly the same position, and the dip is always in the same direction?Is it possible that you have installed the circuit board at an angle?Edit: Bring a new circuit board to remind Gotway configuration components. Link to comment Share on other sites More sharing options...
MetricUSA Posted August 2, 2015 Share Posted August 2, 2015 It doesn't help they show two different boards on abi website...but they mension to 'use tweezers' to shorten 'validation holes', did you reset board? Link to comment Share on other sites More sharing options...
Jay Barnett Posted August 2, 2015 Author Share Posted August 2, 2015 The other board on the abi site is 30B, which is the older version. 30BS has a larger aluminum plate and updated firmware.It says on the listing "there are no points of validation on the controller with bluetooth. Horizontal validation through app program."The pic showing validation holes is not on this listing but is on the listing for the 30B. Naturally being chinese they have mixed up the instructions by including the validation description also in this listing. As far as I can tell there is no validation points on my board, but I may try some of the points anyway.Will it continue in exactly the same position, and the dip is always in the same direction?Yes in same position regardless of speed, and the dip is always in the direction of travel regardless of what side the LEDs are.Its up totally vertical when you jump on, then as accelerate it quickly assumes this dipped position.Is it possible that you have installed the circuit board at an angle?No, circuit board is attached to the same holes of original board exactly vertical. And wheel remains stable at vertical when switched on. I can get on easily as normal, then when i lean forward it starts to accelerate and dip to stay at strange angle. I think the horizontal calibration is ok. Which makes me suspect there is a difference in my wheel OR this new controller with updated firmware (which im only the second person to buy) isnt configured right. Which wouldnt surprise me at all considering the tendency for chinese to knock stuff out quickly without thorough testing. Link to comment Share on other sites More sharing options...
esaj Posted August 2, 2015 Share Posted August 2, 2015 Sounds like it could be on the "soft"-riding mode, like the comfortable mode on Firewheel? It lets the pedals tilt forwards (and backwards) while you lean, I'd like a combination where it stays level when leaning forwards, but dips a bit backwards when doing hard braking... Have you tried switching it between the modes, does it affect anything? Maybe they got the names for the modes wrong in the app ("soft" is "hard" and vice versa) Link to comment Share on other sites More sharing options...
Jay Barnett Posted August 3, 2015 Author Share Posted August 3, 2015 Thanks i will look into that, and try again to switch modes. Ive been selecting hard or Madden depending on which app i use. It seems the gotway app has 3 modes and the 2 chinese apps that came with the controller have two modes and 3 modes ?! Typical of chinese to give me conflicting apps and instructions However even if its soft mode it still doesnt make sense.. it leans forward sooo much its impossible to stay on and it wont accelerate past about 15 km/h, im gona try reversing the hall sensor wires in case ive got the wiring wrong and its causing this odd behavior... i will also try as many apps (due to bluetooth module been generic) as i can find for android. Link to comment Share on other sites More sharing options...
Jay Barnett Posted August 3, 2015 Author Share Posted August 3, 2015 Ok so I have tried different modes, tried different cable combinations. Only one combination works so i know the connections are correct. It leans forward so much its almost to the point where it will cutoff from too much angle. Its un-rideable like this. So I have two options, return the controller for a refund and switch back to me original controller which does work very well, has great acceleration and never cuts out. Or buy the 500 watt motor from the same company that sold me the controller, then I know it will work (well if I go with the assumption that this new controller is not compatible with my current motor).Oh well it was a fun experiment.One thing I found however is that when I turn on the wheel my bluetooth on the phone picks up 3 different connections. Only one connects with the wheel, so im thinking one of the other bluetooth numbers must be for using with a factory bluetooth app for firmware or other adjustments.If only we could get our hands on one of those apps or softwares that connects with it then maybe we can do some real adjustments?Im guessing in the future at at some point someone may design a piece of pc software that can connect and hack these devices.. its all so new for now. Link to comment Share on other sites More sharing options...
hobby16 Posted August 3, 2015 Share Posted August 3, 2015 Nice mod ! I wanted to do it sometimes ago already by putting my Gotway's mainboard into my generic but never took time to do it.Your board is like a Gotway board. It has bluetooth so doesn't have a horizontal calibration header which can be shorted to enter calibration mode, so you must use the BT app to calibrate.Try to follow the BT calibration procedure for Gotway (there are video tutorials) with your app.If it does not work, download and try to connect with Gotway app (very hard to to connect the first time, try older and newer versions, many many times !) : http://blog.wheel.lu/?p=453Please, report if success (there is no reason you can't calibrate), I am really interested in this mod, especially about the pedals tilt-back and the speed limits. Try riding long enough to see if the motor is fried by too much power Beware of the BMS cutoff though. The probability is much higher since there will more current draw with the new board, thus more voltage sag, especially if you keep the weak original battery. Wear body protections when trying please. Link to comment Share on other sites More sharing options...
Jay Barnett Posted August 5, 2015 Author Share Posted August 5, 2015 I have used the latest gotway app 4.0 and it connects fine, in fact all the gotway versions connect fine it seems. I can calibrate but it makes no difference. Its unridable. It has plenty of power but tilts so much forward that it too close to the cutoff angle and dangerous to ride. I even set the calibration back 20 degrees but it still wasnt stable going forward. My wheel obviously isnt compatible with this controller. But the gotway app is good. I am in negotiation with Lee now to buy one of his 500w motors that is designed for this controller for $69 USD, Im waiting to here what price shipping he can offer me. Then I will have a wheel that will go 30 km/hr and be safe to ride and i can use my old 500w motor for another project Link to comment Share on other sites More sharing options...
hobby16 Posted August 5, 2015 Share Posted August 5, 2015 @Jay,hmmm, try other wiring-combination of the 3 hall sensors. Are you sure the calibrate is done (gotway must acknowledge by 3 bips). And what about setting different modes (madden, comfort...) with the app ?I see no reason why another motor's power would improve anything. Scratch my head... In the RC world, our motors & controllers are interchangeable.If your board is faulty, you would be stuck with a board AND a motor and no ride. Link to comment Share on other sites More sharing options...
SirGeraint Posted August 5, 2015 Share Posted August 5, 2015 My theory is that the Controller Board is either made for or calibrated for a different size wheel (tire) which is affecting the calculations made based from the Hall effect sensors. Link to comment Share on other sites More sharing options...
Jay Barnett Posted August 6, 2015 Author Share Posted August 6, 2015 its designed for a 14 inch wheel and mines a 14 inch, but im guessing they have changed the position or distance between hall sensors or something for newer model. Its calibration is different from the old style as well. my original wheel had the old calibration where the wheel spins 3 times in each direction. These new controllers calibrate stationary which means i feel the calibration is different and cannot determine the position of the sensors and magnets like the old style calibration did. Which means new style controllers and wheels have to be matched. The new calibration only calibrates for horizontal whereas the old style calibration calibrated for stators and gyro so they were more versatile. Thats my theory anyway. Ive tried different hall sensor combos and all ride modes and calibration many times so no luck. There is only one sequence that rides and that sequence is exactly what matches with the color scheme of the wires so I know its correct. red is +ve 4.5v, black is ground, which only leaves 3 wires in the middle, the center wire (green in this case) can only be center of the 5 pins, so its always the same no matter what direction so that leaves only two combinations.. pins 2 and 5 can be switched around which creates violent shaking so its clear that i have the right combo Link to comment Share on other sites More sharing options...
Jay Barnett Posted August 6, 2015 Author Share Posted August 6, 2015 and just for the record i did try swapping green pin 3 with 2 and then 5 just to be sure and result is violent shaking. Its a shame that the chinese who sell these controllers dont understand how they work and leave it up to us to work it all out. If I tried to explain all this above about the old vs new calibration I think it would be lost in translation sadly. Lee who sold me the controller didnt even know that english versions existed for the app and had sent me 2 chinese apps that were very hard to use. I discovered via russian forum that the english gotway apps are exactly the same as the ones he sent me but much better menu and clearer design and in english! Link to comment Share on other sites More sharing options...
esaj Posted August 6, 2015 Share Posted August 6, 2015 Hmm, this goes a bit off-topic, but I wonder if Gotway or Kingsong could publish the protocol specs, as it seems that now there are at least three different boards using the same protocol to talk to the app (Gotway, Kingsong and this mod-board). That way we'd have at least some "de-facto" standard of communicating with the wheels. Of course one can always just peek at the Bluetooth-traffic via some sniffing tool and reverse engineer it... Link to comment Share on other sites More sharing options...
Jay Barnett Posted August 6, 2015 Author Share Posted August 6, 2015 yes indeed.. maybe you could.. i got too much on my plate already to work that shit out.. we need Elliot on the case. Link to comment Share on other sites More sharing options...
hobby16 Posted August 6, 2015 Share Posted August 6, 2015 The new calibration only calibrates for horizontal whereas the old style calibration calibrated for stators and gyro so they were more versatile. Thats my theory anyway.It's not possible to calibrate the hall sensors' position because of their hysteresis. The BLDC algorithms usually use two feedback systems, depending on speed. At low speeds, hysteresis impact on angle uncertainty is not so important so it uses hall sensors. At high speeds, it uses emf (note that most BLCD motors in the RC world don't have hall sensors because they always operate in the high speeds zone, eg multicopters or racing cars).So I am thinking the theory that hall sensor positionning might affect your board riding angle is incorrect.If I find time this WK (must do some other nice project with @esaj so I'm not sure) , I'll try to put the X3 motor in my Gotway and put the Gotway motor into the X3 and I'll let you know. BTW who is "Elliot" ?Hmm, this goes a bit off-topic, but I wonder if Gotway or Kingsong could publish the protocol specs, as it seems that now there are at least three different boards using the same protocol to talk to the app (Gotway, Kingsong and this mod-board). That way we'd have at least some "de-facto" standard of communicating with the wheels. Of course one can always just peek at the Bluetooth-traffic via some sniffing tool and reverse engineer it...I get something with the Android terminal emulator Blueterm when pairing with my Gotway. what Blueterm shows is a lot of "zzzzzz", lol !The Gotway sends log data in binary streams. Link to comment Share on other sites More sharing options...
Jay Barnett Posted August 7, 2015 Author Share Posted August 7, 2015 Elliot from the show Mr Robot, I dont own a tv but this is the best thing ive downloaded and watched in years!http://www.imdb.com/title/tt4158110/ Link to comment Share on other sites More sharing options...
MetricUSA Posted August 9, 2015 Share Posted August 9, 2015 Jay what the hell!!! Your dam link make my tablet go bezurk, someone delete his off topic post.... Link to comment Share on other sites More sharing options...
John Eucist Posted August 10, 2015 Share Posted August 10, 2015 Jay what the hell!!! Your dam link make my tablet go bezurk, someone delete his off topic post....I removed the link in question just in case but retained the IMDB link. It appears Jay was answering hobby16 about "who is elliot?" Link to comment Share on other sites More sharing options...
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