Dzlchef Posted June 20, 2019 Share Posted June 20, 2019 2 hours ago, Lucas Alexander Oliver said: Considering the sheer number of nikolas out there and the fact that so far yours are the only MOSFETS that have blown and they blew only with some manufacturing errors and under extreme conditions .. I like to think that the nikola is pretty damn tough. And that the blown ones were kinda a fluke. Maybe the bigger MOSFETS would be better but the hundreds or thousand out there seem to be doing fine so far. So all in all I think it’s safe to say the nikola is pretty damn bad ass. I love it. And may buy the plus version when Jason gets them in so my wife will ride the 84 v and I’ll ride the 100v. They are great wheels. All around. Great design great power. Wonderful comfortable feel. And as long as you buy them from @Jason McNeil and ewheels you can be confident that you’ll be taken care of no matter what happens . I can’t stress enough how important that customer service is when dealing with this tech. Don’t find out the hard way. buy from a reputable dealer who will stand by their sale. Jason at Ewheels.com !! Just my two cents for the day! Couldn’t agree more! Marty has a bum board on the Nikola and it becomes a second rate wheel?!? Not sure why you wouldn’t love this wheel, except maybe for looks. It’s been absolutely amazing at everything I’ve thrown at it and it rides like a dream. Every day I love the wheel more! 2 Quote Link to comment Share on other sites More sharing options...
Popular Post MaxLinux Posted June 20, 2019 Popular Post Share Posted June 20, 2019 4 hours ago, Marty Backe said: all wheels from the last two years made it up this hill. So actually I do expect modern performance wheels to survive this ride. And if they do I can have confidence that I can ride them anywhere. I know that I will rarely, perhaps never, ride my wheel in such stressful conditions. But as a customer, if Wheel A made it up the hill but Wheel B did not, I want Wheel A! The first generation of EUCs could only dream of climbing this hill. The fact that all wheels from the last two years made it up the hill demonstrates the rapid progress of EUC design. 4 1 Quote Link to comment Share on other sites More sharing options...
IRK Posted June 20, 2019 Share Posted June 20, 2019 24 minutes ago, Dzlchef said: Couldn’t agree more! Marty has a bum board on the Nikola and it becomes a second rate wheel?!? Not sure why you wouldn’t love this wheel, except maybe for looks. It’s been absolutely amazing at everything I’ve thrown at it and it rides like a dream. Every day I love the wheel more! I like the sound of that. Planning on ordering one! 1 1 Quote Link to comment Share on other sites More sharing options...
Lucas Alexander Oliver Posted June 20, 2019 Share Posted June 20, 2019 (edited) 31 minutes ago, IRK said: I like the sound of that. Planning on ordering one! Right on @IRK you won’t be sorry. It is a fabulous extremely capable wheel that is well balanced ,comfortable and glides smooth as a baby’s butt. I’d still recommend it to anyone. . Edited June 20, 2019 by Lucas Alexander Oliver 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Chriull Posted June 20, 2019 Popular Post Share Posted June 20, 2019 8 hours ago, Marty Backe said: Unfortunately this is an impossibility. Only a destructive inspection is possible based on the control boars assembly and how the MOSFETs are secured to the heatsink. Therefore I will not be inspecting my replacement control board. You are really sure about the impossibility? I am with you that one cannot make a 100% non destructive visual inspection, but as the fotos looked like, one can check one mosfet row quite thouroughly, and the second row "hidden" inside between pcb and heatsink maybe just a little bit by peeking inside? Ps.: It's really astonishing how long and strong believes abnd convictions can survive "against" facts... A plastic foil between the mosfet and a heatsink is a death sentence.(1) Period. Thanks @Michael Tucker for pronouncing the difference of the two problems! As #2 (smaller mosfets, possible the temperature sensor perfectly cooled, high currents _reported_) is only an assumption till now - there is enough reasoning behind to discuss it and stay prepared, but no real world proove till now. (1) ... Of course only if the heatsink is not only for "optical" reasons and the mosfet handles the burden without, too. But for power electronics, operating under borderline conditions like in EUCs it just leads to an imminent 100% failure rate... 4 1 Quote Link to comment Share on other sites More sharing options...
Dzlchef Posted June 20, 2019 Share Posted June 20, 2019 7 hours ago, IRK said: I like the sound of that. Planning on ordering one! Too bad you’re not able to make Sunday’s ride. I’d let you take the Nikola for a spin. It’s one of those wheels that I had mixed feelings regarding the looks and general girth but that all that fades to memory when you experience the ride. It doesn’t make sense that it should be so agile and graceful. 3 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted June 20, 2019 Author Share Posted June 20, 2019 1 hour ago, Dzlchef said: Too bad you’re not able to make Sunday’s ride. I’d let you take the Nikola for a spin. It’s one of those wheels that I had mixed feelings regarding the looks and general girth but that all that fades to memory when you experience the ride. It doesn’t make sense that it should be so agile and graceful. It really does appear that my perceived Nikola hyperbole is not perceived as such with you Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted June 20, 2019 Author Share Posted June 20, 2019 5 hours ago, Chriull said: You are really sure about the impossibility? I am with you that one cannot make a 100% non destructive visual inspection, but as the fotos looked like, one can check one mosfet row quite thouroughly, and the second row "hidden" inside between pcb and heatsink maybe just a little bit by peeking inside? Ps.: It's really astonishing how long and strong believes abnd convictions can survive "against" facts... A plastic foil between the mosfet and a heatsink is a death sentence.(1) Period. Thanks @Michael Tucker for pronouncing the difference of the two problems! As #2 (smaller mosfets, possible the temperature sensor perfectly cooled, high currents _reported_) is only an assumption till now - there is enough reasoning behind to discuss it and stay prepared, but no real world proove till now. (1) ... Of course only if the heatsink is not only for "optical" reasons and the mosfet handles the burden without, too. But for power electronics, operating under borderline conditions like in EUCs it just leads to an imminent 100% failure rate... The thing is, this plastic is very thin. There was still some stuck to the thermal transfer sheet and even having full access to it in my hands, it's difficult to see. You're correct that there may be a possibility of detecting something on the outside row, but not a chance on the inside row. And in my case, it was the inside row. I just wouldn't have any confidence of a safe wheel based on a visual inspection. I'll post a follow-up when I do get the new board. 1 Quote Link to comment Share on other sites More sharing options...
Harold Farrenkopf Posted June 20, 2019 Share Posted June 20, 2019 I have a endoscope that I use for my ear examination that costs around $20 on eBay. It has a focal distance of 10 mm. It is 5 mm in diameter and could go in there it examine the surface of the pads. 3 Quote Link to comment Share on other sites More sharing options...
Chriull Posted June 20, 2019 Share Posted June 20, 2019 (edited) 6 hours ago, Marty Backe said: The thing is, this plastic is very thin My assumption is, that the heat transfer pad - some ?silicone? Is more or less " amorph, the plastic foil reflective. So with some flashlight differences should be seen. But just a theory.... Ps.: And the plastic foil could be forgotten between the pcb and the thermal pad..:( Edited June 20, 2019 by Chriull 1 Quote Link to comment Share on other sites More sharing options...
IRK Posted June 20, 2019 Share Posted June 20, 2019 8 hours ago, Dzlchef said: Too bad you’re not able to make Sunday’s ride. I’d let you take the Nikola for a spin. It’s one of those wheels that I had mixed feelings regarding the looks and general girth but that all that fades to memory when you experience the ride. It doesn’t make sense that it should be so agile and graceful. Yep bummer. Would love to try it. Quote Link to comment Share on other sites More sharing options...
Popular Post Marty Backe Posted June 20, 2019 Author Popular Post Share Posted June 20, 2019 (edited) 28 minutes ago, Chriull said: My assumption is, that the heat transfer pad - some ?silicone? Is more or less " amorph, the plastic foil reflective. So with some flashlight differences should be seen. But just a theory.... Ps.: And the plastic foil could be forgotten between the pcb and the thermal pad..:( There are new findings (I can't say more at this moment) that indicate the substance on my burnt MOSFETs was glue (hot?), not the plastic film from the thermal transfer sheet. You may be able to guess why this assembler would use glue here And yes, every single Nikola may be affected. Edited June 20, 2019 by Marty Backe 4 9 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted June 20, 2019 Share Posted June 20, 2019 WTF? 1 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted June 20, 2019 Author Share Posted June 20, 2019 2 minutes ago, meepmeepmayer said: WTF? This is deja vu all over again (me and the MSuper V3s+ firmware bug). 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Kens Posted June 20, 2019 Popular Post Share Posted June 20, 2019 4 2 Quote Link to comment Share on other sites More sharing options...
Unventor Posted June 20, 2019 Share Posted June 20, 2019 4 minutes ago, Marty Backe said: This is deja vu all over again (me and the MSuper V3s+ firmware bug). So long story short, is it fixable? And how does this affect the trust in the wheel? Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted June 20, 2019 Share Posted June 20, 2019 1 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted June 20, 2019 Share Posted June 20, 2019 I'll wait til you can say more, Marty Hopefully, even if this is glue, this was just a singular accident and not some moronic assembly guy using glue for the mosfets. (Trying to stay sane by assuming the best) 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Dzlchef Posted June 20, 2019 Popular Post Share Posted June 20, 2019 Uh...??? Bring your kid to work day at the assembly line??? 6 2 Quote Link to comment Share on other sites More sharing options...
Lukas83 Posted June 20, 2019 Share Posted June 20, 2019 question for the electronic gurus here : in theory: if you can get the to247 mosfets and get rid of all that hot glue residue, do you guys think it's possible to change the mosfets myself to the 247 ones?? I know a guy who is an expert in soldering, would not be a problem for him to change the mosfets... but I'm not sure if everything will work if you only change them? of course I will go for a lot better heatsink as well... what do you guys think about? Quote Link to comment Share on other sites More sharing options...
Adel Posted June 20, 2019 Share Posted June 20, 2019 (edited) 1 hour ago, Marty Backe said: And yes, every single Nikola may be affected. Edited June 20, 2019 by Adel Quote Link to comment Share on other sites More sharing options...
Harold Farrenkopf Posted June 20, 2019 Share Posted June 20, 2019 (edited) What? It’s not the film? Guess we should have had more pictures up closer and different angles. Why the fu€# did they put hot glue under the mosfets? Surely you jest! Edited June 21, 2019 by Harold Farrenkopf 1 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Sketch Posted June 21, 2019 Popular Post Share Posted June 21, 2019 I thought we were getting past this kind of blatant QC issues from EUC companies. Apparently not. They all seem to be offenders of this (Gotway, Kingsong, INMOTION) and put out devices not tested and checked before they are put into customers hands. I created my avatar 2 years ago as a funny response to feeling like a test dummy each time a new wheel comes out. The first adopters are in fact the test dummies. That being said, I’ve owned some very good reliable wheels over the last few years from many manufacturers. On a side note, I’m considering getting a 100v Nikola on the next batch. Might be a good time to buy since hopefully Gotway will be paying close attention to detail after a situation like this. I hope all the current Nikola owners get this issue settled quickly. I know this kind of thing can drive us crazy worrying about these issues. This is one reason I buy from a reputable seller like Jason at ewheels. I have full confidence he will make things right. Thanks to Marty for bringing this Nikola issue to the light so quickly before someone gets seriously hurt. Hopefully it all gets straightened out quickly. 2 2 Quote Link to comment Share on other sites More sharing options...
Hunka Hunka Burning Love Posted June 21, 2019 Share Posted June 21, 2019 I was wondering whether that residue could have been the silicone waterproofing paste they tend to slather on? Quote Link to comment Share on other sites More sharing options...
Harold Farrenkopf Posted June 21, 2019 Share Posted June 21, 2019 2 hours ago, Lukas83 said: question for the electronic gurus here : in theory: if you can get the to247 mosfets and get rid of all that hot glue residue, do you guys think it's possible to change the mosfets myself to the 247 ones?? I know a guy who is an expert in soldering, would not be a problem for him to change the mosfets... but I'm not sure if everything will work if you only change them? of course I will go for a lot better heatsink as well... what do you guys think about? The exact mosfet device if available in that style of case with the same pin out should be swappable but physically may not be mountable on that heatsink??? But then you said you would improve that too. 1 Quote Link to comment Share on other sites More sharing options...
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