We just can't have nice things
 

So i fried my tekno/Nue 1515 2.5d this week and im kind of confiused as to why.

here is the deal, i have run it less than 30 times, it has never been over 90 degrees most of the time in my revo platinum geard for 35mph on 5cell

MMM v2 always on low timeing. after tearing it down the bearings are fine, there isn't and exposed wireing that could have ground out.

when it fried it was in my hot bodies lighting, the drivetrain spins freely so there wasnt any binding and the gear mesh was fine.

so heres what happened

i gave it alittle throtle, it kind of shuttered like it coged but then took off, it went 30 feet and made a sound like an outrunner does when breaking (some of you may know, its a very diffrent sound, almost like a arcing sound) and then quit, no smoke, very little fried motor smell, but over 300 degrees and the mmm wires were 210 degrees.

after it cooled i pulled it out and tore it down, it looks fine but the rotor isnt magnetic anymore :lol:

so this is the second motor that i have fried ever, both in this buggy both with this esc, im starting to think its the esc, what do you guys think?

anyone know what Nue will charge me to fix it?

im alittle afraid to use the esc again so i guess its going back to castle too

so guys what do you think caused the motor to fail?

I can't see how the ESC can fry a motor in and of itself. Usually, a rotor gets demagnetized easily when the motor is geared too high and "over-volted".

agreed

and it wasnt overgeared or over volted

Did the winding wires get squeezed together? I had one of the first Tekno/NEU's, before they put grommets on the wires at the can. It did pretty much the same thing.

thats what i was gonna suggest. is there any chance some of the copper wire coating could have come off and windings touched? just an idea but not even sure if that would cause the symptoms you had.

^^^ (What they said)

it has the grommets, i opened it again this morning and looked at extensively, all the windeings that are visable look fine, i removed the wire grommets to, the wires look fine under their, bearings are great, rotor has alittle magnitisim but no where near what it should ( not a suprise after seeing the temp)

i know the heat killed the motor but i dont understand why it went from fine to dead in 30 feet

oh well, its going back to neu monday morning

i will update you guys on what Neu has to say about it

You drove through a cloud of Dark Matter... That must be it! :lol:

Is it possible that something on the buggy feels fine when you roll it, but is distorting and binding under power? Like one of the diffs, do you have another car to try that esc and another motor in?

the only way i could see that happening is if the bulkheads were twisting under power or if the bearings were going bad

i will try it with my tekin system if it stops raining today

I really don't think it's a mechanical problem. Nothing like that would cause such a dramatic increase in power consumption and leave the truck operable. I think it's the controller. Probably a defect in the feedback circuitry causing the timing to be extremely high, which would make the motor draw excessive current and heat up very quickly.

Now imagine the motor drawing that excessive current for the whole time you drove it, probably a few hundred-thousand revolutions, and therefore over a million pulses of extremely high current into the motor. It's an avalanche effect, because as the rotor loses magnetic strength it will draw even more current. You said it cogged a lot when it first started up, and the wires were really hot afterwards. That seems to support my theory.

It's kinda ironic, the FETs in the MMM didn't blow under the load. Maybe you can ask them just to replace the brain board in your controller since the FET board is fine...

A faulty ESC can blow a motor if it is energizing a single phase constantly. But usually, the ESC FETs will blow way before the motor gets hot enough (from the excessive current) to demagnetize the rotor.

That's why I figure it was a timing issue. If it was a single phase short in the controller then it would have blown, I agree with that. He said the motor looked good inside, with no burned windings.

thats what makes me wonder about the esc, you should have herd the acking sound it made, one of the other guys running at the pack 50feet away heard it.

i ran the buggy in the yard with my tekin system geared for 30mph.........thats the most i could gear for (damn 1400kv setup:lol:)

ran it threw 5000mah, motor was 88degrees, buggy ran great no binding

I feel your pain Semi. It seems like everytime I run some uber expensive component fails. It's never the cheap easy fixes that happen.

I've sworn I'd quit r/c numerous times after a costly mishap, but always come back.

I read more, learn more and try again.

What track and what classes do they have? I'd love to see your rigs in person

i here you, i think i am done for alittle while, i may sell some stuff and keep one or two but today was another bad day, maybe the worst of my life

Vent man!! If it was that bad don't dwell on that crap. If you don't want to publicize it but want to vent PM me, I'm a good listener.

I hope things turn around quickly for you.

I know someone that's been looking to buy a tekno/neu:whistle:

ok

if you want the motor you can have it


i shouldnt but here goes

i cough my girl friend of 8 years cheating on me, i confronted her about it this morning when she woke up, and now its over with

she was my life,i loved her i told her every day, i showed her every day, i was going to ask her to marry me on July 4th (our anniversary)

i gave her a choice, this life or that one ( i dont even know why i offered, they trust would be gone.) and it wasn't me.

i gave up so much for her, and now what, i have almost no family,and i dont know what to do now

i haven't even told my Friends, most of them will read if here

Damn dude. I've loved one girl in my life, my first son's mother. She and my son live 300 miles away with her more financially secure husband. I think about her everyday. She left me 10 years ago.

I don't have any feel good sayings or even any good advice,as positive of a guy as I am. That just plain sucks. I can't believe she did that to you. That's the ultimate betrayal.

Why the f didn't she part ways if she wasn't in love with you, instead of living a lie.

I only know you through here but I know you deserve better, but I hear that she was what you wanted.

Seriously man, need to talk or even just bs to get your mind off things, I got nothing else to do I'm disabled. RCMbrothers are here for ya

That's a dreadful thing to happen Semi Pro. I'm sorry to hear about it. I guess the rc will take a back burner for a little while.

thanks paralyzed

i dont understand it either

everyone at her work knew, it was her boss she was f ing, no one had the ball to tell me

maybe it will be for the best, i spent the whole day doing house work after droping all of her things off at he parrents house, she still has a mustang i was restoring for her and honda cbr i need to get over to her parrents, but atleast my house is clean

i dont know, im kind of lost

You need to keep busy then. Sounds like you were busy in the house but need to spend a bit of time away or something?

there is no where to go and nothing left to do, i cant go out and spend money, im going to have a had time paying the bills next month as it is.

im in construction, its been a hard last few years as it is

Sorry to hear about that SEMI PRO sometimes things happen for a reason. Dont know you other than here but you seem like a relly good guy.dont dwell on it , i know its hard from personal experience.at the end of the day you will find that you are a much better person and dont deserve being treated that way :yes:

That sucks but better you found out now than on July 5th or later...

No question you'll be hurting for a good while but you'll come out the other side better...

And don't take her back... Trust me she'll try... F'ing the boss never lasts...

Porn, fixes everything.

I cant say I knw exactly how you're feeling, but I do know what its like to be stabbed in the back by a girl you thought was you're friend; not a pleasant feeling & Im still kinda seething ~9 months later. Keep busy though, r/c would actually be a good outlet ( think of all the extra cash you'll have too now that you dont have to spend it on her, spend it on bills instead ), try and build some bridges with old friends and family- suprising how sympathetic & understanding people can be about these things, I've seen how GFs can take over one's life to the detriment of your other friends and relatives.

You'll probably have the last laugh though, a relationship between a boss & emplyoee is never a terribly sound base really, especially if someone grassed on the boss to his boss say ( area manager/ head office etc ).... :whistle:

Take care, and remember; porn. :smile:

A character building time of your life, ha? Do you workout and do excersize? Maybe a time to start. It's going to be a hard rut to pull yourself out of. Please don't take anything we say the wrong way.

i know and i wont, i a bigger man than that, i have seen how it turns out to many times i dont want to always be worring about when it could happen again or if it is.

cough!!!! cough!!! Talk about thread jacking:lol:
hopfully that made you smile SEMI

My condolences Semi Pro...

I think that you're better off knowing the truth before going any further in the relationship. Like that Tekno/MMM combo you had, something just wasn't right and it's best to cut your losses (even if you can't exactly get a refund on love lost).

Nothing is harder to deal with than a broken heart. I think the feeling sticks around all damn day and night, and the smallest little reminder of your happy days will send you into a days worth of tailspin and staring at the wall.

My first girlfriend cheated on me. I was 18 and she was 28, so it was bound to happen. I wanted to throw a rock at every girl I saw for about a week, then got over it.

Then I turned the tables and did the opposite, habitual cheater.. not trusting anyone. But looking back, I was just as much of an a$$ for doing so.

Now I call 'em straight. RC's will be here long before and waay after any of you gals will, and NO, you can't drive any of 'em. Don't even look at 'em too hard. Just like having a lil fun every once in awhile..

Seriously tho, cheer up man. You've got more friends here than you know of. I've also got an extra medussa motor if you need it. PM me..

thankyou, thats got to be my first smile of the day.

i dont think i will have more money, she had a stabe income,it wasnt alot, i get paid when investers free up more funds of when a job gets finished.

i burnt alot of bridges for her, i lost touch with alot of people, im a diffrent person than i was back then im not really sure i want or should look for old freinds, she was always my best freind, i told her that all the time

i know my spelling sucks im not useing the spell checker today, i really dont care

come wrench on my cars? My buddy has been a framer for 13 years, he just took a landscaping job as a laborer. The trades in MN are definitely slow right now.

Get those last reminders of her outta there.

Take care of yourself, nobody is worth losing yourself over.

When you're ready it's dollar beers at the King of Diamonds 4-6 and $10 lap dances. On me. I know your not ready to hear that, but I'm long overdue for a run to KOD.

Wish I could help... only time will.

i kind of feal diffrent than you, i hate being alone, i need someone to depend on me and someone that when i need them i can deepend on them, all day i have been thinking of finding someone else to fill that gap in my life.

the title to this thread really bothers me now, its not funny any more

lol k.o.d im going to have to pass on that my freind i knew to many strippers and i dont drink, now may not be the best time to start , trust me i thought about it, there is enuff in my house to keep me wasted for a week or two

I can sympathize with the way you feel, even if we are coming at this from different angles. But any old "brand-x" person ain't going to cut it, right? Find the person you left behind 8 years ago when you took a detour with this young lady. Get your life back man. It's all about emotional balance. And as with our beloved hobby, the more balance ya got, the faster out of the corners (ie, the moments where life has you down) and the the better you fly.

I don't drink either, had to offer. I've got kids, I'm a straight shooter (well, whacked in the head, but a good person) And have plenty of r/c's that need wrenching. I'm just across the river. I've never met another RCM member in real life. It could be a dream come true:love:

Get a pet cat or dog, or something else cute that offer lots of affection ( tribble perhaps? ). I live on my own & it does get kinda lonely, but being in a 5th floor flat makes owning anything other than fish a hassle; the mouth action on gold-fish is kinda tempting though for a singleton.... http://forums.bit-tech.net/images/smilies/worried.gif

Neil, your messing things up. I'm trying to give the guy a pet Harold. Of course he'll take a cat over me. Sheesh

not while i am down like this,the way i am right now is not me, its not how i want to be known.

im normally the comedian in the room i have to make everyone laff and smile, i dont know how long it will be till i feal that way again.

it will have to happen i will get afew other local rcm members that are buddys of mine to come out or you could drop by stillwater, we have some great parks to bash at, or we could take a trip to hobby farm and go racing. its up to you, i know you were haveing some troubles too so it doesnt need to be soon.

Cool. Anybody I run with has learned from me and I picked their setups. It would be cool to run with someone "on my level".

Yeah, no hurry. I'm not going anywhere.