Eagle Tree of MMMv2 death

[kulangflow]

I happened to be recording an Eagle Tree log when my MMMv2 gave up the ghost on its second day of bashing. I don't know if it will help anybody, but here it is just in case it could be of some use to someone.

E-Revo - MMMv2 - 9XL - 24/65 - 4s 8k lipo. I know my set-up is mild enough because my stock MM/CCBEC works like a champ in there, as did my MMMv1 before I sold it to a friend. The v1 is still running strong.

[TexasSP]

Nothing looks odd. Seems to average 40-50 amps. Nice to see a real record, good job on that part, but sorry for the loss.

[JerryF504]

I had an Eagle Tree on mine when it died as well but everything looked good so I never posted it.

[kulangflow]

The actual average was 5.89A. If you take out the amp values less than 5A, then the average is 22.21A. If you're really bored and do that in increments of 10, then you get this (although you're not sure if it is of any value or has any meaning):

The samples were taken 10x per second, so count indicates how many samples were in that range from which the average was taken. This shows how rare it is that the higher current was pulled. Of course, the real average shows that too, but I'm very bored.

0A+ avg = 5.89A; count = 7244
5A+ avg = 22.21A; count = 1749
10A+ avg = 28.13A; count = 1257
20A+ avg = 40.52A; count = 662
30A+ avg = 51.96A; count = 388
40A+ avg = 64.81A; count = 225
50A+ avg = 73.91A; count = 156
60A+ avg = 84.99A; count = 99
70A+ avg = 92.28A; count = 73
80A+ avg = 101.87A; count = 48
90A+ avg = 110.15A; count = 32
100A+ avg = 119.10A; count = 21
110A+ avg = 127.41A; count = 14
120A+ avg = 129.58A; count = 12
130A+ avg = 133.33A; count = 7
140A+ avg = 142.34A; count = 1

[bdebde]

Seems most are still dieing a bec death, need the eagletree servo logging to see what is going on there. Maybe the big digital servos getting in a bind is killing the bec?

[kulangflow]

It could be the twin servos in the E-Revos that are doing the damage also. The MMMv1 I had that is still running strong was always used with one "weakish" servo. The MMMv2 died with the twin E-Revo servos. Just a thought anyway.

When I get my replacement, I'm only going to use one of the servos and see how long the MMM lasts.

[JerryF504]

My 1st v2 is still running strong on an E-Maxx with 2 200oz digital servos and my 2nd v2 was running 1 very weak analog servo when it died so I doubt it's related to the load.

[mxracer]

the weak servo was probably being overloaded and pulling big current , the strong servos especially 2 of them are probably idling away nicely and not pulling too many amps

Originally Posted by JerryF504

My 1st v2 is still running strong on an E-Maxx with 2 200oz digital servos and my 2nd v2 was running 1 very weak analog servo when it died so I doubt it's related to the load.

[tc3_racer_001]

hmm, but wouldnt it have been utterly stupid of castle to to test this out? like seriously, they deal with huge planes and such, and surely they could do tests to see if the bec would fail with 2 5955tg servos at lock for 10 or so minutes and see if the BECS fail? its starting to look like v1 all over again. poor castle. and poor me whos going to have to pay like $50 just get a working one (STUPID INTERNATIONAL SHIPPING> GRR :)

[TexasSP]

Originally Posted by kulangflow

It could be the twin servos in the E-Revos that are doing the damage also.

I had problems with the twin servos in the e-maxx as well. I burnt out 4 in only about 6 runs. They seem to fight each other too much and as come out of alignment from each other. I am sure this puts quite a bit of stress on things. They should just go with one high torque metal gear servo and be done with it.

[suicideneil]

My v1 is still working fine, and I use a pair of HS645Mgs- not the strongest setup in the world, but it does for me, and the esc just ticks along merrily.

[kulangflow]

Originally Posted by suicideneil

My v1 is still working fine

I should've kept it.

Both of the v1s I sold are working perfectly and the v2 I kept died. That's just not right!

[MTBikerTim]

Originally Posted by tc3_racer_001

hmm, but wouldnt it have been utterly stupid of castle to to test this out? like seriously, they deal with huge planes and such, and surely they could do tests to see if the bec would fail with 2 5955tg servos at lock for 10 or so minutes and see if the BECS fail? its starting to look like v1 all over again. poor castle. and poor me whos going to have to pay like $50 just get a working one (STUPID INTERNATIONAL SHIPPING> GRR :)

It only cost me $16 including shipping materials to send 2 v2s back from Aus. The international shipping isn't that bad.

[Sammus]

If you want to sent it registered/insured it cost a bit more. A few months ago I returned my mamba max registered, including a $50 money order, and the cost for the currency conversion, the stupid fee for the international money order, and the registration, came to near $100. Then I went on b-p-p and bought a brand new one for a hair over $100 delivered... but still, shipping wasnt that much ($26? insured to the full au value). The international money order was annoying though, bad time for conversion, plus they charged like an 8% or 10% commision or something. iirc it was like $68 for a $50USD money order.

[suicideneil]

Originally Posted by kulangflow

I should've kept it.

Both of the v1s I sold are working perfectly and the v2 I kept died. That's just not right!

I was thinking the same thing...

Wanna buy a functioning MMM? Only $500....