Physical differences between MMM V1, V2, V3? - RC-Monster Forums

simplechamp · **Physical differences between MMM V1, V2, V3? -** 08.30.2009, 10:51 PM

I have a MMM in my E-revo and just bought another used one for my truggy. One of them has all five 6.5mm female bullets directly on the ESC board. The other one has three 6.5mm female bullets on the board for the three motor connections, but has the battery power input wires directly soldered to the board.

They are both supposedly V3, yet they have different connector setups? How can I tell what version they are for sure?

brushlessboy16 · 08.30.2009, 11:11 PM

v1 had all wires

v2 had all bullets

v3.1 had a slightly taller case and bullets

v3.2(latest) has motor bullets, tall case and power wires without bullets.

simplechamp · 08.31.2009, 12:43 AM

Thanks! I know the one in my E-revo is a V3.2 then. The one I just bought must be a V3.1

V0RT3X · 08.31.2009, 06:44 AM

Why did they dump the bullets on the batteries? I think they're cool since you can swap between parallel/series directly. :D (not so many connectors) And they feel snug too, can't imagine popping out.

Marvin · 08.31.2009, 07:35 AM

For the same reason as hard cased packs with bullets fail; the bullets (with repeated removal/replacement) get a little loose. This ramps up the resistance, causes them to get really hot, and then can desolder the connectors from the board.

I guess they only got rid of them on the power side because you'll need two sets of connectors (the 6.5mm bullets in the case, and the other connectors). You may need to change the order of the motor wires, so they kept the bullets on that side.

emaxxnitro · 08.31.2009, 12:16 PM

Quote:

Originally Posted by Marvin

For the same reason as hard cased packs with bullets fail; the bullets (with repeated removal/replacement) get a little loose. This ramps up the resistance, causes them to get really hot, and then can desolder the connectors from the board.

I guess they only got rid of them on the power side because you'll need two sets of connectors (the 6.5mm bullets in the case, and the other connectors). You may need to change the order of the motor wires, so they kept the bullets on that side.

i do miss the bullets but this is the reason for the change. if you have to have your bullets though you can still put them on the wires and have the quick disconnect....

MetalMan · 08.31.2009, 02:53 PM

Not sure if this was a real reason or not, but many have complained about shorting between battery/motor bullets and the heatsink. PdelC mentioned this was a non-issue because the resistance of the heatsink is greater than that of the switching FETs.

Personally I prefer wires for the battery leads since it is a much stronger connection, and there are fewer solder joints.

TexasSP · 08.31.2009, 03:09 PM

I never did see a confirmed incidence of that. There was a lot of speculation though.

shaunjohnson · 08.31.2009, 05:08 PM

i love the bullet idea....but i really hate bullets on the board!!
every single time i take out my main phase bullets i am petrified of having the VXL all over again LOL...bullets comming out :(
granted they are better than traxxas's futile attempt but when you are pulling on them you have to pull exactly vertical on them.

i'd rather have bullets on the wires cause then you can pull on wire vs wire rather than put any force on the main board.