Z-Rabbit Posted June 2 Share Posted June 2 Maybe somebody has already asked this question, but I can't seem to find it. What is the maximum amperage/wattage the BMS will allow before it cuts out? Quote Link to comment Share on other sites More sharing options...
Rawnei Posted June 2 Share Posted June 2 7 hours ago, Z-Rabbit said: Maybe somebody has already asked this question, but I can't seem to find it. What is the maximum amperage/wattage the BMS will allow before it cuts out? Your question is not very specific, you mean when charging? According to the spec sheet the max charge rate is 15A. 1 Quote Link to comment Share on other sites More sharing options...
Z-Rabbit Posted June 3 Share Posted June 3 On 6/2/2024 at 2:15 AM, Rawnei said: Your question is not very specific, you mean when charging? According to the spec sheet the max charge rate is 15A. I'm embarrassed to admit it never occurred to me to check the owner's manual. But thank you for the info. Oh! While I'm here, I want to again thank you for your various STL files, I'm currently rocking your footlock replacement and I LOVE them. Completely changed my ride, to the point I'm now comfortable rolling down steps and sometimes hitting a few (small) jumps from time to time. I even just did a 100 mile ride last week with them! Thanks so much! Spoiler 2 Quote Link to comment Share on other sites More sharing options...
M Squared Posted June 4 Share Posted June 4 Anyone know what the proper PSI is for the new tubeless tire? The tire itself states 33psi Max but the last email from Jason/Ewheels says it should be 35psi at a minimum. I weigh 140 with no gear so only need a little past the bare minimum. Quote Link to comment Share on other sites More sharing options...
o u euc 2 Posted June 5 Share Posted June 5 (edited) On 6/1/2024 at 5:48 PM, Rawnei said: Well I'm doubtful it will be a problem either way. More important to me and a lot of riders is avoiding the kickstand hitting something when dropping of obstacles since it's way too long, if that happens it could potentially be the cause of a crash or a fall, that is why people remove it and why I designed the shorter one. I hear ya. You do good work too. You’re probably right about the kickstand. It still blows my mind that 75 lbs of batteries and computer are just riding on 2 pogo sticks held onto the axle by 4 bolts each. So the only thing really holding this machine together is the shock caps, and the 4 bolts on the axle. How does this not rip the axle bolts out. Seems like a tremendous load on the axle bolts, but I suppose this is true of non suspension wheels too, only non suspension will be more compact, and not as much leverage on the axle bolts as longer bars like shocks. Amazes me is all. On 6/1/2024 at 5:48 PM, Rawnei said: Edited June 5 by o u euc 2 1 Quote Link to comment Share on other sites More sharing options...
Rawnei Posted June 5 Share Posted June 5 33 minutes ago, o u euc 2 said: I hear ya. You do good work too. You’re probably right about the kickstand. It still blows my mind that 75 lbs of batteries and computer are just riding on 2 pogo sticks held onto the axle by 4 bolts each. So the only thing really holding this machine together is the shock caps, and the 4 bolts on the axle. How does this not rip the axle bolts out. Seems like a tremendous load on the axle bolts, but I suppose this is true of non suspension wheels too, only non suspension will be more compact, and not as much leverage on the axle bolts as longer bars like shocks. Amazes me is all. I recon most of the stress is in the downwards direction, the bracket have a lip on it plus a socketed shape so the shock rests ontop of the bracket and that stress is transferred onto the bracket which is secured to the motor with the M6 bolts, as you surmised the bracket and no less the motor bolts are critical parts in this design but the shocks do help a lot by dampening that stress and it seems to work fine mostly except some cases where the bolts came loose for various reasons or in the case of Shibbys Lynx which is an extreme case and an outlier. Considering what Shibby is doing with his wheel I'm guessing what happened is a combination of the material not being strong enough for his usecase possibly in combination with the bolts not being properly torqued which added even more stress on the parts involved, but of course this is just speculation based on logical thinking, I'm certainly no expert. I'm also guessing that most of the wheels on the market today would have already broken sooner rather than later from the same usecase, there's already cases of the Extreme having multiple critical faults from less extreme riding (pun not intended). It's tricky, they could take this into consideration in their next iteration of design and try to make the parts or material choices even stronger but how will they solve motor bolts coming lose or riders not torquing them properly after maintenance? This seems like a common occurrence on a lot of different wheels. Lots of riders who do maintenance don't even torque the bolts properly with proper tools, some just use a small hex key from Ikea and torque important bolts by hand and call it a day, there was a Sherman S that fell apart during a ride after the rider performed a tire change most likely because the bolts weren't torqued and possibly even loctite missing. Yet many riders who do take care of their wheels properly have no such problems at all. Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted June 5 Author Share Posted June 5 1 hour ago, o u euc 2 said: the only thing really holding this machine together is the shock caps, and the 4 bolts on the axle. How does this not rip the axle bolts out. The only thing holding the 50lb wheel assemblies onto the cars driving past you at 60mph are: four bolts between the wheel and hub, and one strut housing. This type of bolted joint is simple, robust, and prolific. Maintained properly, it's great. 1 1 Quote Link to comment Share on other sites More sharing options...
The Brahan Seer Posted June 5 Share Posted June 5 24 minutes ago, RagingGrandpa said: The only thing holding the 50lb wheel assemblies onto the cars driving past you at 60mph are: four bolts between the wheel and hub, and one strut housing. This type of bolted joint is simple, robust, and prolific. Maintained properly, it's great. But do EUC's use spigots to keep the wheel onto the hub assembly like cars do? I guess the answer is some do (Extreme Bull Commander mini??) or not really. These guys say in cars its not the nuts that take the force of the rotation... https://forums.whirlpool.net.au/archive/1456753 Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted June 5 Author Share Posted June 5 15 minutes ago, The Brahan Seer said: do EUC's use spigots to keep the wheel onto the hub assembly like cars do? Yes. Quote Link to comment Share on other sites More sharing options...
Popular Post fl105kg Posted June 8 Popular Post Share Posted June 8  Lynx user manual in case anyone wants to see it digital 👍 Lynx Manual.pdf 5 2 Quote Link to comment Share on other sites More sharing options...
Mcfoster Posted June 19 Share Posted June 19 On 6/2/2024 at 3:30 AM, Z-Rabbit said: Maybe somebody has already asked this question, but I can't seem to find it. What is the maximum amperage/wattage the BMS will allow before it cuts out? I've maxed out the houning charger at 17A without issues, but according to spec sheet it's 15A max. I've read someone trying 18-19A but the BMS turned of charging at that level. The 50s cells are rated for 24A and the ports 20A together. Quote Link to comment Share on other sites More sharing options...
peytole Posted June 20 Share Posted June 20 At high speeds, I sometimes have woobles on the Lynx. On the Master at 85kmh, no woobles. I like offroad, so the 30mm lowering kit seems too extreme to me. Is there a 15mm kit? Quote Link to comment Share on other sites More sharing options...
Popular Post Mcfoster Posted June 22 Popular Post Share Posted June 22 (edited) New firmware out! Allows to set maximum charge level anywhere between 147-151.6v through the app and ability to change all the setting in app like low battery/high speed mode. Edited June 22 by Mcfoster 5 1 Quote Link to comment Share on other sites More sharing options...
oaschi Posted June 25 Share Posted June 25 On 6/22/2024 at 11:46 PM, Mcfoster said: New firmware out! Allows to set maximum charge level anywhere between 147-151.6v through the app and ability to change all the setting in app like low battery/high speed mode. Which version is this? I have 5.0.08 and the app wants me to "upgrade" to 5.0.07?? Quote Link to comment Share on other sites More sharing options...
Q-Back Posted June 25 Share Posted June 25 4 hours ago, oaschi said: Which version is this? I have 5.0.08 and the app wants me to "upgrade" to 5.0.07?? and 5.0.9 introducing extra configuration options 1 Quote Link to comment Share on other sites More sharing options...
RagingGrandpa Posted June 25 Author Share Posted June 25 On 6/22/2024 at 5:46 PM, Mcfoster said: New firmware Allows to set maximum charge level anywhere between 147-151.6v That's "partial charging" - it will defeat cell balancing if the charger voltage is set higher than the EUC firmware. Better to set your charger to the same voltage that the EUC firmware is configured to, to ensure the CV transition takes place. And it makes me wonder: if you do a 90% charge correctly by setting both the EUC and the charger to 147V, will the BMS engage top-balancing at 147V? (It could, but it would be the first EUC to work this way...) 1 1 Quote Link to comment Share on other sites More sharing options...
InfiniteWheelie Posted June 25 Share Posted June 25 (edited) What I don’t understand is why balancing needs to be done at the maximum voltage, or a particular voltage in general. Why can’t a BMS be designed that balances the cells regardless of overall voltage, whenever the wheel is turned off? For example you return from a ride and your battery is at 50%. You turn the wheel off at which point it checks for imbalance. It notices an imbalance and begins to balance the cells passively while turned off. If you turn it back on before it’s finished, it checks again next time it’s turned off and continues the process. Maximum charging voltage would be controlled by the BMS/app, and would end charging when a single cell reaches the maximum voltage setting (per cell). This would prevent any cell from being overcharged, and allow setting the max voltage wherever you like. Edited June 26 by InfiniteWheelie Quote Link to comment Share on other sites More sharing options...
t0me Posted June 26 Share Posted June 26 I never noticed on the previous firmware the ability to download the logs. They still don't mean anything to me, it just sends what I see on the screen in the app to a text file. Has anyone come up with an explanation as to what the app's logs mean? Also, I don't see it mentioned here but at least one guy has been having a tilt issue since the latest firmware update. https://www.facebook.com/reel/771726825113223 Quote Link to comment Share on other sites More sharing options...
onkeldanuel Posted June 26 Share Posted June 26 4 hours ago, InfiniteWheelie said: What I don’t understand is why balancing needs to be done at the maximum voltage, or a particular voltage in general. Why can’t a BMS be designed that balances the cells regardless of overall voltage, whenever the wheel is turned off? For example you return from a ride and your battery is at 50%. You turn the wheel off at which point it checks for imbalance. It notices an imbalance and begins to balance the cells passively while turned off. If you turn it back on before it’s finished, it checks again next time it’s turned off and continues the process. Maximum charging voltage would be controlled by the BMS/app, and would end charging when a single cell reaches the maximum voltage setting (per cell). This would prevent any cell from being overcharged, and allow setting the max voltage wherever you like. It can , but the bms needs to be an better and pricier one then i guess Quote Link to comment Share on other sites More sharing options...
InfiniteWheelie Posted June 26 Share Posted June 26 (edited) @onkeldanuel What, an extra $50 in parts on a $5000 product? So a 1% increase in price, meanwhile the've been jacking up the prices by thousands of dollars in recent years. The problem is the lack of will to do it, and maybe the expertise, not the cost. Edited June 26 by InfiniteWheelie Quote Link to comment Share on other sites More sharing options...
Rawnei Posted June 26 Share Posted June 26 7 hours ago, RagingGrandpa said: That's "partial charging" - it will defeat cell balancing if the charger voltage is set higher than the EUC firmware. Better to set your charger to the same voltage that the EUC firmware is configured to, to ensure the CV transition takes place. And it makes me wonder: if you do a 90% charge correctly by setting both the EUC and the charger to 147V, will the BMS engage top-balancing at 147V? (It could, but it would be the first EUC to work this way...) I've seen it circulating that it will balance regardless about 80% SoC but nothing that I verified. 3 hours ago, t0me said: I never noticed on the previous firmware the ability to download the logs. They still don't mean anything to me, it just sends what I see on the screen in the app to a text file. Has anyone come up with an explanation as to what the app's logs mean? 1 Quote Link to comment Share on other sites More sharing options...
onkeldanuel Posted June 26 Share Posted June 26 (edited) 48 minutes ago, InfiniteWheelie said: @onkeldanuel What, an extra $50 in parts on a $5000 product? So a 1% increase in price, meanwhile the've been jacking up the prices by thousands of dollars in recent years. The problem is the lack of will to do it, and maybe the expertise, not the cost. Sure, i dont know, to me it seems they tend to use the cheapest available parts that just work out barely....LK is better then the others for sure in this regard.... But if you think about the battery cells (first the LG ones till the fires), then the mosfets on for example the S22 Board or or or , they only change to better components if the demand forces them to do so....or the problems get huge enough, (and in case of the bms: they were even non existent till maybe 2 years ago, so most are happy now with this kind of "smart bms" and they dont feel the need to cut their margin with pricier parts they have to source from a supplier) Edited June 26 by onkeldanuel Quote Link to comment Share on other sites More sharing options...
t0me Posted June 26 Share Posted June 26 Thankyou @Rawnei! What am I doing wrong (please)? When I paste the contents of the text file it all goes into the A column. Do I need to change the format of the text file to csv or something to get it to go into A-D columns? Quote Link to comment Share on other sites More sharing options...
Q-Back Posted June 26 Share Posted June 26 (edited) 21 hours ago, Q-Back said: and 5.0.9 introducing extra configuration options My previous post was somewhat strange formatted (and I wasn't able to edit it). I've just claimed my Lynx today and I can confirm that 5.0.8 version allows you to set max charging voltage in the wheel settings (no option in the app). It's in normal wheel settings, not in advanced. It's last position. AFAIK 5.0.9 is just adding option to set things up using the app on your phone. Edited June 26 by Q-Back Quote Link to comment Share on other sites More sharing options...
joyrider Posted June 26 Share Posted June 26 Beware of latest update apparently causing dip/shutters. Some of us rolling back with EUC world. Quote Link to comment Share on other sites More sharing options...
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