Argh!!!!!!
 

Not sure if I should put this thread in this forum, but since it's sorta on topic, here goes:

I think everyone knows me and my story at this point! With that in mind, I decided to do a little troubleshooting. So I hooked up my Rx and steering servo only, and plugged in a battery pack. Much to my surprise, within seconds of doing this, my $125 digital servo became RED HOT, and started melting!!! WTF! Will it ever end??? I have no idea why, but one of the little chips on the board is bad apparently, and when it sees a battery, it just starts frying itself. Of course, it's no longer under warranty. SUCKS!!

I also checked to see if my motor screws were too long (I have digital calipers), and they're not. Nope, no shorts here, they're actually the perfect length; they go about 3.04mm into the motor case. Perfect. I knew I checked this before.

So, MMMv2 #3 (that's 4 MMM's total) arrived today, and a few minutes ago, I finished hooking everything up (had an extra servo laying around for steering, but WAY underpowered for this application). Much to my surprise, IT WORKS!!!! :yipi::yipi::yipi::yipi::yipi::yipi::yipi::yipi::y ipi::yipi::yipi:

Yes, I calibrated it, and not only did I get to mount the wheels and pull the trigger for the very first time, but I drove my Muggy around the house!!! It really, truly WORKS!!! Tomorrow can't come fast enough!!!

I'll keep everyone posted in the brushless forum. Hopefully, it will be ONLY good news, and NOT another broken high dollar component. Under warranty or not!

THANK YOU PATRICK!!!!

Bad servo?

Glad to hear it works. :yes: Have fun with it!

How does it go- ...4th time's the charm??? :mdr: I really hope it works well for you. You deserve a break; I think you've had the worst luck out of everyone so far! Just don't give it to me!

yay, no more rants :lol:

Good News. Happy days.

Remind me again, was this (bad) servo connected to the Rx when you tried calibrating/ setting up all your previous MMMs?

Hmm, this very well could explain your past troubles mk351e. For a servo to get that hot it has to be drawing a ton of current from the BEC. Sounds like hooking up that battery pack just saved your 4th MMM from getting fried. I would open up your RX & make sure there is no damage there even thou it is still working, all that current went thru the power trace on the RX's board. I also would inspect the wires on the back you were using when the servo fried, they should have gotten very hot as well.

I can't remember, are you the person that Patrick said not to use the no-spark resistor?

Glad to hear you got it sorted out! Must have been getting aggravating!

What I usually do to check motor screw length is this: With the motor unmounted, manually (with my fingers), slowly, and gently turn the motor screws into the motor until I feel it touch the coils. Mark the threads. Remove the screw and measure how far it went. Then, I subtract a mm or so for a safety margin. Now you know the exact depth!

Good (for us) to know it wasn't the fault of the Monster. $125 for a servo that crap's out on you isn't cool. I would still see if they might warrenty it. It is rated for 6v right? If you have to replace it, these have always done the trick for me and priced right that you can have a spare or two on hand. If you're really strapped for cash (or for that project you don't want to sink a bunch money into right away) these will do the trick but have been known to oscilate a little when returning to nuetral.

Castle took care of you fast...you got their attention! (squeaky wheel get's the grease)...lol.

Bingo (from the other thread):

Well, thats another mystery solved. Seems like the bad servo, although it works, was pulling a ton of amps from the MMM's BEC, which caused it to pop each time. I like happy endings....

Does that mean there are only 2 MMM failures now?

iv been thinking. could this be due too the V1 MMM frying?

when it blew it took some servos with it? I know the CC BEC does that sometimes

what servo is this so i know to avoid buying it?

125 bucks, id hazzard a guess for a 5955tg or similar... i have one and couldnt be happier!

Why? Electronics go bad from time to time, it happens to all manufacturers...

How on earth are you on your fourth one and people who preordered a long time ago still have none

Squeeky wheel > oil I believe was mentioned...

As for the servo: Futaba S9351 digital steering servo

I agree with Metalman though- servos can go bad, as can any electrical item, for no apparent reason. That said, a high torque digital servo that went haywire could pull alot more amps in theory than a normal analogue item, I'd have thought?

God bless my 2 little HS645MGs :yes:

It's too bad there isn't some sort of fuse block available to prevent this sort of thing from happening.

do me a favor and go over this whole disaster.
the servo was bad from the beginning (but worked?) on the BEC it didnt glow red hot but a reciever pack gave the short enough to make it glow?

did castle say the mmmv1 may of damaged the servo?

Well, it would be impossible to prove that any of the MMM's fried my servo, so there's really no point in even thinking about it. I'm gonna suck it up as a loss, and be happy the damn thing works. And, as it turns out, it works great! BL is awesome!! The power is just INSANE!!!! I'm gonna get the servo fixed, it was too much money to dump it.

I got mine so quick because, well, I don't know. From what I understand, there was an extra 100 made for just in case, and they must have been pulling from that pile for me. They did the right thing though, I mean, I pre ordered mine in what, April? 1st broke, the v2 broke, then they sent another becasue they felt bad, and when that puffed, they did it again. I have no idea why others are still waiting, but should I have been put to the back of the list every time? Don't think so.

However, 30 seconds into the maiden run, my 2 brand new pre mounted phaltlines blew out the foams because of an improper glue job at the factory, so I have no street tires now. I will call hpi tomorrow - $50, and they lasted literally about 30 seconds. BS!

At some point I would imagine, things WILL STOP going wrong for me!

where did you order from. A lot of these people had original v1 and just got a replacement. This will yield priority over ANY pre-order. And it also depends on where your pre-order is. Certain online retailers will get a stock before others.

BTW if you seen mk351e was an original v1 repair guy so he would have priority.

just re-glue them. BL makes so much torque that premounts never hold their bead long, even a proper done personal job will lose it's bead much sooner than a nitro would. CA just can not hold the torque of BL for long. I keep a bottle of glue in my pocket every time i take the truck out :lol:

Glad to hear it is running well.

I had the same problem with the pre mounted Phaltlines (full set of 4), returned them to HPI and asked that they send me unmounted ones. They did but it took a couple months because the tires were out of stock (got the wheels in a week or so).

Maybe not a total happy ending but glad you are seeing light at the end of the tunnel.

yeah, I like happy endings, uh hu huh huhuhuhuhuhu :lol:

I'm on my way out to run now. I REALLY love BL!!! WAAAAY better than nitro! And I REALLY like the Muggy too; VERY impressive! :yes: I still don't get why it's not more popular; it's like a revo on steriods. Kinda.

I think I am on par with MK on bad luck with the MMM at the moment. I think I might be a bit worse as I still don't have a working one. Castle is getting it sorted though so I can't complain. I also know that it's not my servos killing the MMM too as they have all been in other cars in between MMM's.

my premounts didnt unglue but they are so out of balance!!!!!! i balanced them and after 5 minutes they are out again like the foams are moving inside the tire .terrible.

The foams in Phaltlines aren't exactly what I would call foams... I actually removed all of the tires from the rims, taped them with duct tape, clean up the tire and wheel beads, and reglued everything. They've held up very well since then.

so u dont have any foam in the wheels?

There is foam in there, but over time it has worn down to a consistency similar to having no foams. Fortunately these tires have very little sidewall, so this near foamless-ness isn't so bad.