Blue smoking MMM

I was bored, so I went out to race.
But too bad the the new MMM replacement didn't like me

After couple of runs the car was lagging and smoke came out First I thougt the motor is smoking, but after removing the body.....Waauuuwww lipo EC5 connector is loose from the wires
The high current melt the soldering hahaha

Luckely my Hyperion 45C lipo is still alive.
As you can see the MMM is dead.
Also look at the capacitors one them is leaking
Maybe this was the problem for smoking out.
The glue went from white to blue colour????

[fastbaja5b]

Another 6s Ripple Current victim? (looks like a 6s Lipo based on the balance connector?)

How old was the ESC?

Hope Castle looks after ya mate!

[suicideneil]

Looks like a V4 or V5 judging by the BEC coil thingy. Weird though, doesnt look crispy fried like burnt MMMs usually do- no obvious damage on the control board side..

[E-Revonut]

Based on the title and the first couple lines of the original post I thought this was going to be about a nitro motor! LOL

[DrKnow65]

Originally Posted by E-Revonut

Based on the title and the first couple lines of the original post I thought this was going to be about a nitro motor! LOL

Let's be cool, no need to use the "N" word here.
This is an adult friendly forum :-)

[josh9mille]

isnt that the MMM that you completely modified and soldered on? I see you soldered the switch traces closed. will CC even warranty that now?

I've only added some heatsink to stock bec wiring.
It is much better due the heatshrink, on stock bec wires I broke many times the bec wire.

It's strange because, because on V3 I had no problem at all!
V3 died only due a crash and missed some smd's components.

Possible problems:
The leaking condensator.
Heatsink, because glue is not transfering sufficient heat.

This the second time I am using the new MMM, after the rip V3 MMM.
O yeah I really don't care about the warranty.
I am honest and wanna share some problems to make the product better hahah:-)

[nuz69]

What firmware did you use with it ? New firmwares (1.25 and higher) seems to produce "blue smoke" ...

[J57ltr]

The caps failed for sure, but what caused that, I don't know.

Jeff

I can't remember, but I thought one of the latest.
I will try to connect to the PC and find out the firmware version. It's kinda strange because I had no problem at all with V3. Well I have to say the V3 had a older firmware version. Because newer versions didn't work with mine DS2X and 6S Hyperion lipo.

[BrianG]

Theory:

Poor connection on the EC5 connector which created resistance. That resistance created a voltage drop when large currents flowed which then caused lots of heat to melt the solder. That same resistance appeared to the ESC as a poor quality battery (high internal R) which increased the amount of ripple currents which stressed the caps too much and heated them up as well.

The blue stuff on the heatsink was from the explosion of an unfortunate nearby Smurf. Sad really, but they should know better.

Yeah it's possible of the problem, but...

-I am very precise when soldering, you can say control freak hahaha.

-Also why didn't it happen before with the V3 if the connection is bad.

-I didn't have any lagging power.

-Lipo was hand warm.

-And so on....hahaha

[fastbaja5b]

Originally Posted by nuz69

What firmware did you use with it ? New firmwares (1.25 and higher) seems to produce "blue smoke" ...

What colour smoke does firmware 1.24 and earlier produce? Pink? Yellow? Green?