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-   -   Dual MM + One Motor= ? (https://www.rc-monster.com/forum/showthread.php?t=12019)

Takedown 05.12.2008 10:16 PM

I dont know if this would work...

http://i301.photobucket.com/albums/n...U/MMdual-4.jpg

lincpimp 05.12.2008 10:18 PM

That would fry the mm fets... each esc would see 8s.

zeropointbug 05.13.2008 12:19 AM

We all do respect, but that is very stupid idea... not good. First, FET's can't be series connected like that, and second the PWM of each controller would be fighting off on another... I think this would cause all sorts of problems, like maybe smoke show?

Five-oh-joe 05.13.2008 12:34 AM

So... I don't get what you're trying to do here? It still looks like, when all is said and done/wired, both MMs will be seeing 8s, which means they're going to go poof.

lincpimp 05.13.2008 12:52 AM

For battery wiring, you could either just put one pack on each controller. Might be better to parallel the packs together and then y out 2 plugs for the escs. So basically put all of the positives together and then all of the negatives together.

Still think that one esc would be better. I am not sure how well the two escs will work together. Plus if you fry one during the run, the other will most likely let go due to he entire load being placed on it. Just sounds like a bad idea.

tom255 05.13.2008 03:46 AM

Sorry, that stupid idea will end up with fried ESC 100% and maybe motor too.

First of all it its not analog signal that goes to Motor but short impulses you cant just merge them you need somehow syncronizate them. Idealy it may work if all compnents and everything 100% indentical. Even same fets from same batch are bit different so no chance! To make 2 ESC work you need one Fet driver in other word brainboard to make work fets in sync. GriffinRu allready made it, he doubled MM powerboards and drived thems with one brainboard.

Forget it!

And if you still think that it work out dont forget to take camera and film how holy smoke escape form ESC's :diablo:

83gt 05.13.2008 08:18 AM

Yeah, if you're set on this, I'd pony up the cash and have griffinru turn your two MM esc's into a stage 2.

Takedown 05.13.2008 08:32 AM

I meant to write 6s in the battery for my last diagram so that both esc's see 6s not 8s.

BL_RV0 05.13.2008 08:50 AM

6s on a MM. Unless you have enough money for some "expensive" fireworks, I would not recommend this. Nevertheless, we need to get GriffinRU in here to give us a "How-To" on wiring, and MM over-voltage. :rules:

brushlessboy16 05.13.2008 09:10 AM

The max u can go on the MM is 5s td, im pushing it with my 5s now... Remember your fight with overvoltage protection the other day(5s)? with 6s the esc will go "EFF YOU!!!!"

BL_RV0 05.13.2008 09:47 AM

It may even make a racist joke against you. :love:

lincpimp 05.13.2008 10:05 AM

Quote:

Originally Posted by BL_RV0 (Post 172254)
It may even make a racist joke against you. :love:

So a mexican, a jew and a cracker walk into a bar...

brushlessboy16 05.13.2008 10:32 AM

Hey i resent that, im black...

lincpimp 05.13.2008 10:35 AM

Midgets
 
Quote:

Originally Posted by brushlessboy16 (Post 172279)
Hey i resent that, im black...

Sorry, so a mexican, a jew, and a cracker walk into a bar that is predoninatly black...

It is hard to make a racist joke that covers all of the races evenly. I try to be a PC as possible when coming up with a racist joke, but sometimes it is not easy.

My apologies to anyone that I have not offened properly, I will try better next time.

BrianG 05.13.2008 10:35 AM

lol, I never thought I'd hear someone being offended for NOT being included in a racial joke. :lol:

BTW: Don't do two ESCs on one motor. Just asking for trouble IMO. The only way to reliably do it is the use the brains signal from one master ESC, either via direct paralleling of the FET PCBs, or by some non-existent linking cable.


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