Darn...no over-volting the Monster - RC-Monster Forums

Dagger Thrasher · **Darn...no over-volting the Monster -** 05.01.2008, 07:49 AM

Hey people,

Just thought I should post some info from Patrick over on RCZ that I read. It looks like running over 6S LiPo on the Monster ain't gonna happen. Here's why:

[There is] a 28.0V TVS (transient voltage suppressor) on the Monster Maxx -- so you will smoke the TVS with a 7S pack, and then smoke the whole controller the first time you do any serious braking with 7S.

6S is a hard limit. Nothing higher than 26.0V.

Patrick

Link: http://forums.radiocontrolzone.com/s...d.php?t=247907

He also said over on RC Groups that the switching BEC has a constant current rating of about 4A (runs warm) and peak of 5A. Should be plenty for our servos.

It looks like he *might* be planning on an 8S version, and maybe a 12S controller down the line...but that's just purely my speculation. I just wanted people to know about the 6S limit, in case they hadn't read that and try to run their new MMM on 7 or 8S. Ain't gonna happen. :(

sleebus.jones · 05.01.2008, 08:08 AM

Very good information. Looks like 7S A123 is doable tho. However my hyperion won't balance 7S. I still don't know why they make a 12S capable charger, and then only a 6S capable balancer. </rant>

gixxer · 05.01.2008, 09:24 AM

I dont plan on going over 6s but still good information to know.

DrKnow65 · 05.01.2008, 10:25 AM

No fear boys :) I'm sure there will be tweaks and mods to get the MMM going over voltage. If it's only one component, I'm sure it will get modded properly.

I think most folks will find it sufficient on 6S (like me), but then again...

RBMike · 05.01.2008, 12:29 PM

Quote:

Originally Posted by sleebus.jones

However my hyperion won't balance 7S. I still don't know why they make a 12S capable charger, and then only a 6S capable balancer. </rant>

It will balance up to 12S. You just have to get 1 more LBA10 balancer & harness. You slave the second balancer to the first & you can balance up to 12S. The LBA10 manual has instructions showing you haw to do it.

captain harlock · 05.01.2008, 05:43 PM

Hmmm...such a disapointment. I've been waiting for this to come out and now it's extremely dangerous to run it over 6s.

suicideneil · 05.01.2008, 07:13 PM

I can under stand that, but then again- if it says 6s on the label, then 6s is all you can run; why call it 6s if its really 7~8s?... I think 6s2p of A123 will suit me just fine.

05.01.2008, 07:40 PM

Well, they call the MM 3s, and it's usually 4s-5s no problem. I say we'll see what we see. 6s is plenty for me, but I'm sure people will be finding ways to push them farther.

Topspeedtimmy · 10:19 PM

The reason why CC said the Mamba Max could only do 3s is because 4s would push even the 4600kv CM36 motor over the 65,000 rpm limit. The ESC was clearly made for up to 4s, Castle Link has a cut-off for 4s... but you're gonna need a UBEC.

Sammus · 05.02.2008, 03:03 AM

Quote:

Originally Posted by captain harlock

Hmmm...such a disapointment. I've been waiting for this to come out and now it's extremely dangerous to run it over 6s.

killing a component is not the same as extremely dangerous. I think its disrespect to castle to call it such a disappointment. I'm stoked that there is finally a 6s capable purpose designed car controller - im sick of these ludicrously overpriced boat controllers, or the esc that totes it can run at 6s but blows up when your try.

johnrobholmes · 05.02.2008, 03:22 AM

A solid 6s controller, and it is so cheap. Under $200 is unheard of for these specs yet. With any proper 6s or lower setup I really don't think I could overwork the ESC unless I got a 5B or a 25lb emaxx with super swampers.

sleebus.jones · 05.02.2008, 08:21 AM

Quote:

Originally Posted by RBMike

It will balance up to 12S. You just have to get 1 more LBA10 balancer & harness. You slave the second balancer to the first & you can balance up to 12S. The LBA10 manual has instructions showing you haw to do it.

I am aware of slaving the two LBAs, but I think you might have missed what I said. It will balance two separate 6S packs for a total of 12S. It won't balance a single 7S pack. That's what I'd want to do.

Arct1k · 05.02.2008, 08:48 AM

I don't think there is a 7s hyperion balance adapter - I think you get a 3s and 4s adapter on the pack....

You link the 2 lba10's with a link cable and it will balance it as one battery...

Sammus · 05.02.2008, 09:39 AM

You can, other brands of packs also just have two balance leads hanging out.

05.02.2008, 12:54 PM

what voltage is a 6s right off the charger? how about a 7s off the charger. maybe you could wait a while or not charge it to 100% capacity and the voltage would be low enough. Or am i just smoking crack?
personaly all i need it to do is 16nimh. then maybe some of those li-ion sony cells. in a 5-6s2p config