Great video Roger and you are insane for riding it at the end, although it made me laugh. I really don’t want it back so if you can think of anything to do with it, feel free 🙂
@DustinDamien
Жыл бұрын
Hey Marty, wishing you a speedy and complete recovery!
@zweemz2255
Жыл бұрын
feel better marty, sorry to hear about this, you are a tank, get well soon
@OzcroEUC
Жыл бұрын
You have a hole in ya shirt lol
@stefanclooneykannika
Жыл бұрын
Marty, if you dont want it back, and roger has given it the A-ok on a health check, why don't you raffle the wheel off and the money could help pay someones hospital bill who doesn't have insurance or give it to someone who lost their wheel in a bad accident.
@shoestatus
Жыл бұрын
Get well soon Marty Backeman!
@JonahHax
Жыл бұрын
Get the log file from EUC world from Marty's phone. Also take the motor apart and check if the hall sensor board is kinda loose and can wiggle over bumps. Check if the solder points might have scraped the inside of the motor cover and did a temporary short. If there is no silicone or anything on the solder points, put some on to prevent further cutouts.
@scheffman
11 ай бұрын
You guys should continue to use this machine to see if it repeats the issue. This is already the most famous EUC! keep it alive.
@reitze01
Жыл бұрын
Roger, thanks for the teardown. As yet another engineer it seems we're left with Single Event Upset (SEU) as the most likely cause. SEU, is why aircraft controls are usually triplex, quad, or dual redundant. And note that EUC redundancy is inherently limited by single 3 phase motors. Redundant hall sensors do make good sense as well as possibly dual/dual battery and controller designs (as well as the multi-transistors). Maybe someday we'll even be using 6 phase motors (don't hold your breath, that will be years if ever).
@MrIbif
Жыл бұрын
Of course, you write everything well and correctly about redundancy, but in the Begode A2, the power supply of the processor and peripherals is served by one chain of DC-DC converters, and previously it was different. Now any failure/short circuit in the periphery will cause an overload on the power system and lead to a reboot of the controller processor. This is a blatant disgrace. It was done well on the first mten4 controllers
@reitze01
Жыл бұрын
@@MrIbif IDK the specifics of the A2 design. My point is more about redundant systems being necessary for life-safety. Single engine airplanes get to be simplex with "fail safe". Simplex maybe "fail safe" depending upon the FMECA (can glide to the ground), but in the case of a simplex controller-battery-motor needed for safety, how? I mean no dead code, sure - or maybe DO178? But without hardware redundancy its all bullshit. CMMI says miles without unexpected software failure shows flight safety, but such simplex systems only achieve 10^-3 level mission reliability. Why? Well SEU (muons, space particles upset bits in memory/computer). Only redundant control systems overcome that. I've been working redundant systems like that with avionics/engines since the mid 1980s. These wheels are risky, even with perfect hardware. SEU is real. 6 phase, dual/dual control/power - I'd pay $10K for the equivalent performance of a Master with that (and add 20lbs w/o performance boost too). My other POV issue is swappable batteries for less weight configuration with high range config-options and charged swap range extensions w/o base weight being bloated beyond my use cases.
@TheThunderwars
4 ай бұрын
I don't think people realize how rare SEU are and what kind of precise bit flipping is required to get specific output.
@yoshiskysun
Жыл бұрын
“Marty is on a lot of drugs, he’s been hanging out with the Knight Riders too much.” 🤣☠️🤣☠️🤣☠️
@judechopper
9 ай бұрын
I have the issue with cheap Airwheel, that the wheel doesn't stop spinning when footrests hit the ground therefore it tends to want too snap your ancle
@BabbittdaWabbitt
Жыл бұрын
Roger - your vid was posted to the euc forum, and I came over to give it a like and say thanks. Good work.
@roghaj
Жыл бұрын
Thanks for that!still a bit nervous to ride this thing.
@Stan-kj8fq
Жыл бұрын
Damn, I will miss Marty! Get better soon, my guy!
@MrIbif
Жыл бұрын
@ElectricUnicycles, Do you know that since autumn the power supply circuit of the controller and peripherals has been changed on Mten4? Previously, these were independent circuits, but now the controller, hall sensors, headlight illumination, headlight, taillight - they all hang on the same power branch. And if you have a short circuit, say in the headlight, then be sure that the wheel will level you. Compare the controller from mten4 last summer and autumn or the A2 controller and you will see that there are fewer elements on the board. This is an unforgivable reduction in price in my opinion. Low-voltage converters could fail on the wheels of the gotway, but it always carried the rider to the last. Now, thanks to circuit changes, this will not happen. It is necessary that the manufacturer return the old circuit and replace the controllers with controllers where the power supply of the microcontroller and the peripherals are divided into independent electrical circuits.
@ElectricUnicycles
Жыл бұрын
Very interesting analysis 👍
@vtran1082
Жыл бұрын
To quote the New Yorkers, the irony is that between a fire wheel and a cutout wheel, the fire wheel is preferred over the cutout wheel.
@Blox117
Жыл бұрын
the fire wheel makes it go faster
@jumpyjigglesnort2232
Жыл бұрын
I was riveted for every moment of this video. I may be in too deep. It was great seeing Marty smile from the doorway. Great video Roger!
@roghaj
Жыл бұрын
Glad you enjoyed it!
@skampster
Жыл бұрын
I’m about to buy one of these when they hit Australian shores, so at this point, now I’m unsure…………………
@ModiCastle
Жыл бұрын
Thanks Roj. We were all in suspense about the wheel. Like the Al Capone vault 😜😂
@MrAndersonXXL
Жыл бұрын
Sorry to hear about Marty, hopefully he has a speedy recovery. I'm watching this about 1 month into recovering from a broken foot after crashing my v12.
@dantemarcos1410
Жыл бұрын
Marty is one tough cookie he be back in no time 😼👍👍
@mikeh6286
Жыл бұрын
Check the gyro's cutoff points when stationary leaning it left/right. It should be the same angle on both sides. I had a Gotway that had bad recalibration data stored, so it became unrideable. Among other things it cut off at different angles. A room temp calibration later and it was fine. Has been fine now for 10000km but at the time it felt like something was seriously wrong.
@Dogo.R
Жыл бұрын
Do we know how the crash played out that resulted in the broken bone? I'd love to know so that if a wheel does cut out I can "crash safer" via better understanding the possible ways for a crash to play out and mitigating for them ahead of time.
@roghaj
Жыл бұрын
My bet would be that the spiked pedals played a huge role in the injury. Most likely one foot on the ground and the wheel pivoted with his other foot on it. He seemed a bit foggy on it.
@rolands.6439
Жыл бұрын
On a totally different note. I like the idea of putting backlit pictures in the nook between wall and ceiling! Looks great!
@roghaj
Жыл бұрын
Thanks. Printed on an inkjet printer.
@electricunipsycho
Жыл бұрын
Good on you for doing this for Marty
@johnmiller7651
Жыл бұрын
He did for everyone.
@ChrisTorina1
Жыл бұрын
Dang that’s crazy the wheel completely checks out but still turned off on Marty
@roghaj
Жыл бұрын
Gotta be main board.
@vceuc9934
Жыл бұрын
Not finding anything is even more troublesome. Here's hoping this gets resolved...
@roghaj
Жыл бұрын
Yeah... I was really hopeful it was the main power plug.
@electricunipsycho
Жыл бұрын
Did you try pressing on the components on the battery while the multimeter was plugged in? Maybe pressing on the side while riding effected something
@Planet-ICELAND
2 ай бұрын
I wonder will they come out with a A3 or was the Falcon a shift away from the A2 look
@jimmykiang4420
Жыл бұрын
doesnt begode eucs keep internal logs? that would be one way to trace faults by software... again if the feature is available that is...
@roghaj
Жыл бұрын
No data logger / black box memory on the board that i'm aware of. Would be a great place to check if there was.
@cotcotpouetpouet
11 ай бұрын
gotway don't change.
@danoseus
Жыл бұрын
Idea for possible causes 1, weak cells - You should test battery under load, unfortunately not cheap to test - you need something like "DL24MP Electronic Load" 2, Hall sensor / noise at board. - You can rule out motor by connecting it into VESC and checking if hall works at higher RPM
@roghaj
Жыл бұрын
I was load testing it with me on it. over torqued to beeps a few times. No failure.
@Blox117
Жыл бұрын
load can be easy to test, just plug it into a motor and apply a load
@GranDemo2
Жыл бұрын
Literally testing the wheel without gear omg man... Be safe mate! Well it was a nice inspection nonetheless :)
@roghaj
Жыл бұрын
Crash, rinse and repeat.
@GranDemo2
Жыл бұрын
@@roghaj totally haha
@Roskellan
Жыл бұрын
Marty legless, one wheel on his wagon... too soon? You know we wish him well 🙂 Cold solder (UK we would call that a dry joint?) Talking about dry joints you could stress the PCB a little bit, a dry joint on there would do it. Plenty of opportunity on a main board. PCB's are flow soldered, a bit of a black art and you have to be meticulous, clean, and know what you are doing to get good results.
@roghaj
Жыл бұрын
Dry joint sounds better. I might adopt that nomenclature. I do have a microscope that I use for PCBs, but the multilayer nature of these make finding anything a real challenge.
@Roskellan
Жыл бұрын
@@roghaj Hard to see the fault (though a poorly wave soldered board can be identified), easier to reproduce it through distorting the board, if that is indeed the problem. Small connectors too can be a problem. Intermittent, oxidized, dirty, indifferent quality (they are not likely to be gold plated which would be a norm in professional equipment). The springyness in the contacts of small connectors can work harden with age as well. Can be the devil in equipment of a certain age.
@kjm-ch7jc
Жыл бұрын
If the machine caused injury then it should be returned to the manufacture for examination before DIY disassembly.
@roghaj
Жыл бұрын
I disagree. The manufactures have been known to cover up issues that would hurt their reputation. I have no skin in the game. Just wanted to answer the question.
@Blox117
Жыл бұрын
you sound like someone who has no clue what they are doing
@roghaj
Жыл бұрын
Be nice
@FUNKBOOGIE1
Жыл бұрын
Roger EUC ? some E-Wheel riders use a app with their unicycle. usually in that app there's DATA that keeps track of the unicycles operation. look over the DATA first.
@roghaj
Жыл бұрын
No logging was active at the time.
@electriceheads369
Жыл бұрын
I had same cutout happen to me overpower but no beeps and threw me to the ground braking my sholder all I can say is take it easy at 50% or lower as you can’t ride it that hard gotta be gentle with it on the mten4 hope you figure it out I believe overpower maybe 🤔
@Born2Ride108
Жыл бұрын
Did you freespin it? What speed does it cutout?
@roghaj
Жыл бұрын
31mph
@Born2Ride108
Жыл бұрын
@@roghaj Probably not likely Marty cutout at that speed.
@mdk42o74
Жыл бұрын
I build drones I don't know if this could be the problem but the tec in a euc is a lot like my drones that's why I got into euc riding. Iv had two flight controllers that had bad gyros in them they would fly perfect but on landing and or supper fast moves they would cut power and fall out of the sky. The problem turn out to be from vibration to the flight controllers gyro.
@roghaj
Жыл бұрын
I’m a drone builder too. Did bump testing to check the Gyro. No problem there.
@OnAirPromo
Жыл бұрын
Nice job!
@sonyxperiaz3687
Жыл бұрын
How about insufficiently clean signals from hall effect sensors momentarily?
@roghaj
Жыл бұрын
Wouldn't have made the machine turn off.
@masterblasterofdisaster
Жыл бұрын
evil ghost in the machine
@Hunter_Heart
Жыл бұрын
Whats the battery percentage when A2 cutout? You need to examine all the components on the PCB with magnifying glass. Once in the full moon, the computer misaligned mounting components on the PCB. Check all solder points.
@ElectricUnicycles
Жыл бұрын
Keep in mind that it did not cut out but it shut off, going ~12mph 🙂. There’s a big difference. The battery was pretty close to full
@Hunter_Heart
Жыл бұрын
@@ElectricUnicycles Never quit EUC, Marty. God speed on your recover!
@caninphx
Жыл бұрын
@@ElectricUnicycles is there video on this? Could be helpful on determining the cause. Also good luck with the recovery!!
@ElectricUnicycles
Жыл бұрын
@@Hunter_Heart thanks
@scottsum1319
Жыл бұрын
Personally my theory is that this particular A2 happens to be racist. Its one of those thats only for Chinese peeps only so tell Marty to send it to me. I'm of Chinese ancestry so this A2 will do fine by me. Hope Marty gets a smile from reading this. Tell him to heal up soonest as we want his impressions on the Extreme 😅
@stealtherider3008
Жыл бұрын
It's probably not the A2s fault! Maybe it was Marty's! Maybe Marty had a muscle tension or collapse or nerve/brain failure due to his age! Lol! That shirt is nice though.
@roghaj
Жыл бұрын
My usual stance is, don’t blame the wheel. However, in this case, I am making a hard exception.
@arevee9429
Жыл бұрын
Was Roger a EE or technician in a prior life - or just a clever autodidact? Thank you for this detailed troubleshooting session. Send it back to Begode for failure analysis? Maybe they'd be amenable since it did injure a high-profile EUC celebrity.
@roghaj
Жыл бұрын
You’re too nice. I think I’m going to drop my lucky metal shavings in there and close it up to give back to Marty for good luck.
@arevee9429
Жыл бұрын
@@roghaj Give the wheel to Super Lady (Dawn). She can fix it 🙂!
@supakat1835
Жыл бұрын
Faulty capacitor?
@roghaj
Жыл бұрын
I didn’t go so far as to test their capacitance, but they passed visual inspection. I don’t plan on testing every component on the main board one piece at a time. The only parts that would cause the machine to shut off while moving would be a full power disconnect. Almost every other air would result in the machine still being on after the failure.
@scottsum1319
Жыл бұрын
How can it be faulty when Roger is riding it. Either the cap is blown or its not 😉
@supakat1835
Жыл бұрын
Just trying to understand what could possibly go wrong, but that makes sense, my assumption was a voltage drop, caused by a capacitor not holding charge or depleted by some other part of the circuit, but it makes sense that probably isn't the case if it can balance, & Roger was riding it that it was likely an glitch or rare set of conditions met. It's not like anyone has access to a dyno or parallel bars, & a treadmill to fully test it.
@ullle66
Жыл бұрын
@@roghajTotally correct, actually if a wheel is still powered on or if its powered off, is a good indicator for a hardware fault totally cutting power off (machine off), or if its a software fault or slight hardware fault that has nothing todo with power delivery (machine still on)! Capcitor fault would just give you a “weak pedal”, but no catastrophic failure (at least not directly). So thats all pretty curious and in my view you have checked exactly the right components. Unfortunately this feally makes a “zombie” wheel out of it…..
@MVFIT
Жыл бұрын
Four Loko😈💜
@roghaj
Жыл бұрын
I think I might stick to hard liquor.
@DonovanWert
Жыл бұрын
Awesome 😎
@roghaj
Жыл бұрын
Thank you! Cheers!
@VictorBreazzeal
Жыл бұрын
yea everything seemed like typical begode tech it sucks that it dropped marty tho that is super sketchy
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