ahh noooooo...my oh so reliable MMM
 

after bragging all this time...well...here's the story.
race day was sick, little mud, fun.
final 20min main on a zippy flightmax 5s 20c (yes 20C is too low but i dial out the power for that setup).
well after race i put the revo in the van, in a hurry as the rain had started so i left the main pack plugged in. but MMM powered down.

after i got home i went inside, cleaned up the bench while it was free of RC's.
came back to the car 20 mins later and FARK!! major smell and an uberpuffed lipo :gasp::gasp:.
ripped the lipo out and threw away outside in the rain and took revo inside, mesured the resistance of MMM and it's a dead short across the input leads.

deans melted, little black soot around the active wire on the MMM board so it died peacefully:cry:

ok...you reckon it's my fault and should chuck $60 in with it on it's round world trip? it was working fine till i found it bout 3/4 hour after it's shutdown.

shaun

Ouch. That sucks.

I always unplug...always. Risking my $150 ESC with my $360 worth of packs is not worth it on my G2R.

Happened to a friend of mine as well. I saw how upset he was so I can imagine how pissed you were...sorry for you loss

Sorry to hear what happened,good thing the car RC and the car weren't damaged being unattended like that. Sounds like seriously weird fluke ???

BTW: An ESC will register as a dead short at first if the caps aren't charged up. A meter outputs a small voltage and if the caps are discharged, the meter charging them will look like 0 ohms. Give the meter about 10-30 seconds and you should see the resistance start to climb as the caps charge...

This is a reason I don't like switches... I don't have any on any of my escs. Too bad you lost all that stuff.. :angel:

That sucks man... I had a similar failure, but my RX wires yanked themselves off of the board. For some reason I wasn't upset... :whistle: :neutral:

i'm not really upset but i'll go try and boot it up on 6cell nimh...dont like my chances as it smells like death in there LOL

Then it's dead and there's no point in trying to revive it, sounds like.

something else too.
on the same day my mates MMM was playing up after the race.
links up fine and the brain seems to be ok (still counts lipo's etc) but it went all funny after that, glitching and no response. thought it was reciver but not the case so it got express posted to castle along with mine this morning...lets see if this express post is all it's cracked up to be!
it must have either been a fluke or they dont like wet-ish days?
casue my friend is...lets say...a sunday driver (over 50 yo), geared for 40 on 6s never uses top speed and is one of the slowest steadyest drivers at the track with a very conservative throttle curve. so it seems unlikely it was mmm fail...more likely his was less water proof? (was one of the transition V2 to V3 ESC's)
shaun

ode to MMM's last race...can you guess which ones are mambafied?
oh yeah...and that's sunday driver phil on 2 wheels at the starting grid:lol: (no CD)

My Monster went up in smoke at the RC-M bash yesterday:-( Truck was muddy after practice so I hosed it off, keeping water away from the esc, I can't say that some of the mist didn't get in but these are supposed to be ok with a little moisture. Then I used theair gun to blow all the water off the chassis, gavethe esc a blast too just to be sure. Set everything on the bench and a few minutes later went to plug in the next pack and out came the magical smoke! This esc has been solid since I got it in April and has seen moisture before and never had a problem, my v3 I sold with my revo seen plenty of snow and never had a problem. Gotta get ahold of castle today. Thankfully Mike had some extra monsters with him yesterday and I was still able to race, however some unfound electrical gremlins struck during the main, esc just kept shutting down and finally wouldn't power up at all. Afterwords I plugged it in and all was fine so. Gotta do some trouble shooting there.

I don't know what it was but I had the same with my grevo.

I powered the car to the start line and then went to start racing nothing! Just about scrapped the thing but thought I'd try again for main.

Hey presto it worked fine - nothing changed...

They must be suseptable to sun spots!

PS that compressor had a lot of water in it.... You could eaily have blown more water into your ESC...

Yeah, compressor did have a lot of water but I figured with the conformal(?) coating it's supposed to be able to tolerate some moisture. Shouldn't have been puddled up or anything like that. Guess I'll see what CC says

*puts more pieces into the jigsaw*
so....what have we learned? water/mud on both my race day and the RCM bash.
my mates didnt have as much mud but was more watery/water vapour while mine was a little muddy round the motor bullets.

but yet the day before we raced i was at the skate park and aquaplaning across small puddles, water mist must have got in then for sure..yet it only failed when i didnt un-plug it :oh:

well least i now know that i'll deffo be un-plugging after day is over from now on!
shaun

IDK, it was raining for one of the qualifiers at the Bash and my MMM was under the nitro cooling head hole in the body. Def got a bit wet but was ok.
Seems sort of dodgy when you may get a failure, like some perverse lottery.

ok.. my theory is, that, because it was such a humid morning, with lots of fog in the morning, and commencement of rain in the afternoon, each time the MMM thermally cycled from cold to hot to cold, small amounts of moisture condensed into water, which eventually found some small crack or break in the PCB protective coating and got into the electronics..:yes:

And FYI mr Shaun, I do use full throttle, and at least I'm not the slowest steerer at the track :na:

Talked to Bernie at CC yesterday and he told me it should be covered, so it's on it's way there, should be there by Friday. Maybe I'll be lucky and get it back before the end of summer

i miss my MMM...it's been at castle HQ for exactly 3 weeks now.
they seem to have lost it cause i emailed joe and and he and jenny so far haveng really given me any info on what's going on.

i'll have to be really carefull next time with it!
shaun

Sorry to hear it is taking so long. Mine took 6 1/2 weeks back in may/june. I dont think they are as busy now as back then, so hopefully they can get it back to you quicker than mine.

Bad luck with your MMM, I too honestly am on egg shells each time I use my E-Revo. I took it out today after a hiatus of about 3 months, and it worked perfectly. I did upgrade to the new firmware when it came though (1.21? don't remember, but it was like two months ago). It ran perfectly, although the 3S Zippys had heated up quite a bit, but they didn't puff beyond the usual sponginess.

ummmmmm.....you serious?

Yes, my Zippy 3S packs have been spongy for a while now, but my 4S packs are rock solid, go figure. But the sponginess hasn't hurt performance. And they're note ridiculously puffed, just a millimetre of puff at the most, they still go into the battery compartments without any difficulty.

ok...ive run puffed lipo's before..but i'd be very carefull!!
they do have their performance affected...particularly their voltage under load...and ripple current is one of the things that blows up MMM's
shaun

I hear ya. I don't much of stop and go runs, I usually run at 3/4 throttle so that the nitros can keep up *kekekeke*, and my brakes are set at 40% because i hate it when the thing somersaults. All the MMM settings are standard and punch is at max and initial power at lowest. But the thing still wheelies even with those settings.

so much to learn:yipi:
brakes with mediocre batts is just as bad!! the brakes are regenerative and hence they pump electricity back into the bats...and pretty fast too!! and if your batts cant take it...the monster trys to..and it wasn't made to do that.
you should not run 3s (unless of coarse ive miss-understood you totaly and you are running 2x 3s in series to make 6s) on a CC monster ESC in any kind of 1/8th application IMO.

am i by chance making a big silly mistake and you are actually using 2x 3s packs in series??....cause that'd make me look silly:oops::rofl:

Yes, 2x 5000mAh 3S 30C packs. I'm a n00b, but I know my shit :P And I mentioned braked because you mentioned ripple currents, I too am aware of it and thats why I try to lay off the brake pedal as often as possible. In a perfect world my E-Revo would have a nitro style transmission albeit with a tighter clutch. Then we wouldn't have this ripple current nonsense and we would have cheaper ESCs because the motor need only spin in one direction.

Edit: My signature displays the cell counts I run in my trucks.

sorry man..my bad hehe.....
i run single packs cause my revo is a convert...other people run twin packs and that's the norm to them...i forget this a lot :lol:

HELL YEAH!!!
guess what's back, back again, Mamba's back!

CC sent me a spare castle link and more 6mm motor bullets too.
thank you castle!!

yeah that comes with all repairs

ripple current:lol:

??

and no, my friends didn't come with a new CC link....cause i'm a special customer:lol: was his name on the credit card but i'm more important :rofl:

Yea Castle didn't send me nothing extra when they repaired mine.
Funny how some of their customers are very "special" to them.
Glad you got it fixed up shaunjohnson

i just laugh when i hear people refer to ripple current, i think its a complete joke

Glad your back in business S.J.
Castle kept both my Deans plugs on my last repair ? I reckon I can't complain but those dam things aint cheap either and were brand new.:cry:

i thought they kept mine too....but then i remembered where they were....both melted together sitting on the workbench:lol:
offering to the god of speed!:rofl:

they do tell you to remove every plug, motor, or whatever else you have connected to the esc, makes it easier for them and easier for you. i think thats almost a direct qoute lol

pretty much common sense isn't it:yes: