Mmm V2 Up In Smoke !!!
 

OMG !!! I thought the nightmare was over!

I got the first v2 MMM last week....ran it about 10 times on 4s and 6s configurations...not even a hiccup.

plugged the batteries in this mornng, turn on the switch...and ppffftt!

a small puff of white smoke comes out the side..and of course, it is done for

just came back from the post office.....oh, the agony:surprised:

At least i'm not the first one to kill one this time...:tongue: sorry to hear about that Larry. I was looking forward to seeing some mean speed run vids from you.

That's just cause you didn't have one yet? :lol:

Larry, was it the fan wires shorting out? Did you open it up and check what might have casued it?

I'm taking the fan out of mine. :(

and maybe working on a new custom case too

Larry you plugged in 2x 3s 5000 mah Maxamps lipos and a Neu 1.5d ? Had you run this configuration with the MMM v2 before ?

this is not the news i wanted to hear i thought the problems had been ironed out
now thats two things i heard i wonder if it was to do with the fan wires
keep us posted
has anyone else got there v2 back a tried it yet

and o yeah sorry to hear about your mmm i bet your gutted :diablo:

ive ran my v2 for just over 3 hours combined time and no issues yet. Im trying to get Larry to say he screwed up so I feel better LOL but I know thats not the case. Ugh. Think I may take mine apart this evening and mod up the case and stuff like in BrianGs post.

you no you shouldnt temp fate dont you

nope..didnt open it...

oh yes....ive run 3 differnt sets of 3s through it..ive run 3s maxamps 5000's.....3s venom 5400's and 3s maxamps 6000's.....the last 2 actually fit in the battery tray, but you cant close the door!

im telling you..the esc never got over 104 on multiple 6s speed runs....it was performing flawlessly!

the failure occurred right when i turned on :gasp:the switch

i think i was the first to get the v2....how appropriate to be the first one to have v2 puff

Sounds right, I was not the 1st to get a V1, but was the 1st to put it in a truck and do any real world testing with it, I received mine v1, 2 days after the
first one were received. have you opened the case yet?

My MM that failed on 5s was similar to yours. Power on and fried before I even got to pull trigger.

Thats fantastic, now I don't know if I should even run it for fear of frying my battery. When my V1 went up in smoke I only got lucky that the battery did not go too.

I guess I'll ebay it and stick to my nitro for another six months.

MGM here I come!

Oh man...this is turning into a total disaster. Sounds to me like some sort of internal short, or perhaps, for some reason, the TVS blew? That seriously sucks though; sorry to hear about it. Lets just hope this is an isolated case.

:gasp:Don't say that the CC lynch mob will be after you!:gasp:

I got 1 of mine back today.It is in my 8T with a Tekno Neu 1515/1.5d/f and Maxamps 4s2p 6000 I ran for about 10 minutes and no problems to report.The temps here are in the 80s and the fan only came on once.:whip::whip:I realy hope these failures are isolated incidents.Thanks Castle:party::party:Sorry guys that sucks yours failed I know you have been waiting.I think I will keep my mod MM for good luck.I hope and wish I dont need it.:rofl:

What mods has BrianG done , tried looking for his post but couldn't find it .

After reading about a couple of issues with the fan wires on the v2, i'm thinking the fan wires might of cut through and shorted out on the board ?

One of our gents had a nice how to and where to dremel fan plug fix somewhere..

http://www.rc-monster.com/forum/showthread.php?t=13512

http://www.rc-monster.com/forum/show...ght=MMM+dremel

I believe he just cut the lid off, to allow for more natural air flow. A few others have dremelled the inside of the case, so that the plug for the fan doesnt rub on the inside of it (under the pcb, bottom half of the case). A few have ran the fan wires out of the top of the case and plugged it into the Rx, using a new fan though that isnt so prone to busting.

EDIT: beat me too it...

i hope its just an isolated case...i have another one on order!

See this link...post #23

http://www.rc-monster.com/forum/show...ght=fan&page=2

Hopefully this mod won't be a moot point!

If I never read these forums I wouldnt know about any of these failures due to this fan wire issue.Iam playen stupid and trusting CC on this one:diablo::na:

I'm sorry that was a typographical error I meant to say mgm sucks castle rules...lol.

There is NO WAY the controller will "fry" your battery. Especially if you run decent LiPo cells. Unless ALL of the FETs shorted at the same time (completely impossible). Whatever shorted would not be able to handle the current and would vaporize instantly with the 150-200+ amps put through it that a decent LiPo can produce. And you know what? If the battery did puff, it probably wasn't rated correctly! :no: All of the failures I've read about thus far have been BEC/fan related which DEFINITELY would not hurt the battery AT ALL. :yes:

Thanks for the links to the MMM mod guys :wink:

However now i think about it more, what phatmonk said is very true and i am actualy getting peeeved now.
It's alright for us since we read these forums and can perform the mods .
What happens to the normal kid who buys one of these to run in his emaxx / revo and doesn't get on these forums as probably 99% of MMM customers.
How are they suppose to know how to perform these mods and that the mods are even needed .Not to mention that these mods void your warranty .

I couldn't wait to get my MMM , iv'e been waiting a couple of months now on backorder ( missed the first batch of backorders )
and have a new X2 truggy that i haven't run yet because of this delay.
It's sounding like some of you guys a crossing your fingers and hoping for the best when running the V2 .
Shouldn't you be able to use a product without the fear of it failing in the back of your mind.

I have used and still will use my MMs and i am buying a new Sidewinder for my 1/10 Pan Car , however i don't think CC should of released the MMM V2 if you still have to cut it up and mod it :bad: :no:
Every issue on the v1 should of been rectified with the v2 which looks like at the moment this is not the case ( fan wires fraying and causing shorts , 2nd case of this happening is on RCtech forums ) and the need to run a seperate fan.

Think i might cancel my backorder and get another R1 Pro for the truggy .

Its hard to comment on something you I dont have yet...I have 2 on backorder and now im thinking Luciano was right to hold off for another 6mos to make sure everything is good. I still hope this is an isolated incident and wont happen to other MMM V2.

Another one dead during calibration , was just posted .It's not looking good .

Yes it is possible to lose the battery. When my V1 went up in smoke the wires from the battery lead to the esc board came unsoldered, had they shorted out in the chassis or together then the battery would have went up. The battery better have been rated correctly for a $260.00 Polyquest.

My question is this. Is this ESC for bashing only? I mean do you just put it in your truck, truggy and run it around in the street or in the grass? If so then the speed control works awesomely, but I plan on racing with it. Airing it out over large jumps, getting tangled in traffic, etc. If this is the case, and it's not built for racing then please CC let us know.

Thanks.

imo the price is just too low... i would have preferred a $250 controller which was bullet proof not a $150 controller with issues... even still i cant wait to get mine :)

ryan

Maybe that is coming someday?

I'm still running a MMMv1 (haven't run it since may-june) and I just removed the fan and cut the top off the case. We'll see how it does once I start racing with it again.

Dude, there is no way I am keeping the MMM is modding it is required for it to operate properly. That's totally obsurd.

'm all for modding stuff to make it do stuff it wasn't intended to do, but that's a different kinda thing.

Having to hold my new ESC's hand while it crosses the street is pretty much the opposite that I am after.

I agree, it's like the Quark, or was it MGM, that needed the FETs sanded and a RCM heatsink and fans to function. It was rated for 6s but couldn't do it very well without mods or with mods for that matter. That IS absurd. The MMMv2 seems to be plug and play so far. There has only been 2 failures so far and 1 was user error.

look at the mm tho, 120 and performs flawlessly, i am sticking to those, no point in going 5-6s for racing

That wouldnt be the esc killing the batts directly though would it, that would be the ends of the wires touching and shorting, but the odds of them staying jammed together like that for more than a split-second are pretty slim.

As for the escs durabilty- just stick a zip tie around the case and that stops it from coming apart (as I found out). Mount it low as possible on the vehicle and you'll be fine.

My v2 appears to be working flawlessly. I will race it this week and see if it holds up. My 3rd v1 has done very well with no fan. I have raced the bejeezus out of it with no problems.

I do think Castle over thought this ESC. The regular MM worked flawlessly. I would have just took the regular Mamba and made it for 5s with the internal BEC and been done with it. Heck, 4s with an internal BEC would have been fine for most people. I also think most of the people buying these would have spent up to $300 for a flawless ESC. Cutting corners for a low price is nice for to attract the bashers, but I don't think that is who is really buying these right now.

Nevertheless, I love my MMM from a performance standpoint. Most of the mods I have made to mine are to improve durability so it can handle the jarring impacts from constant racing. I think the this is where they dropped the ball. It is fine for street bashing and flying across fields, but the design isn't really cut out for 1/8 scale racing.

Even with all the flaws, the customer service is next to none. I am a happy customer.

street bashing is all i do, yet both my v1 and v2 went bad on me...

I was referring more to the design... fan and case breakage.

if you secure the esc good you will not have any problems. I have flown my savage at least 12 feet high if not higher and i am still on the v1. Now the v1 im sure is just luck but the case holding up is because i secure it well. My fan is also perfectly fine.