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-   -   mamba maxx? (https://www.rc-monster.com/forum/showthread.php?t=4569)

BrianG 11.11.2006 01:16 AM

Quote:

Originally Posted by MetalMan
The Mamba Max is supposed to have a built-in failsafe of sorts (as do most ESCs), so that if the signal is lost the ESC will remove power from the motor.

If it was noise, then it was consistent noise. From the time when I lost control of the throttle to the time when it hit my neighbor's car, the RPM of the motor was not varying, so to me it seems like it couldn't have been glitching from noise.

Unless the "noise" was something consistent... Kinda unlikely though.

That failsafe you speak of in ESCs; is that just the arming routine? I know most ESCs look for a valid signal before initially turning on, but I've never known it to be continuous. Interesting.

Whatever the cause, I hope you get it squared away before it descides to do that at FULL throttle!

By the way, did you see what the damage was to the nieghbor's vehicle?

MetalMan 11.11.2006 01:44 AM

I've always thought that most of the ESCs we use will cut the throttle in the event that the throttle signal is lost (like a failsafe would). I am about 90% sure that an ESC like the Mamba Max would have this feature, and in some cases I have noticed that it does (from it activating the "failsafe").

My case is rather peculiar. I've been having pretty serious glitching issues for close to a year now, and it had all occurred using the same MX-3 transmitter (75mhz FM). Earlier this week I got another MX-3 transmitter (used) from Ebay, along with a new set of "genuine" Airtronics crystals. I have two receivers that I'm using right now, and both are Novak XXL receivers. The one that was in the Rustler last night isn't in the greatest condition, so it's very possible that it's not-so-good condition could be causing the glitching. But my other XXL receiver is in much better condition, although I have yet to try it with both the new transmitter and the "genuine" set of crystals.
I can't just get a new radio system, since I'm on a VERY tight budget for what I do in RC (brushless + Lipo everything).
Some time I will have to make a thread of my own for discussing this problem, since I don't want to take up this thread.

But since you asked, I looked at the neighbor's car this morning, and it appeared that there wasn't any damage. Granted, I didn't go up right next to it and look, but there was certainly no noticeable damage, so I guess I only hit the bottom of the muffler.
Funny thing, I asked my other neighbor friend if he heard a loud thud that night at about 9:00pm, and he said he did! Although I will admit it was pretty loud...

neweuser 11.11.2006 01:53 AM

Quote:

Originally Posted by MetalMan
The Mamba Max is supposed to have a built-in failsafe of sorts (as do most ESCs), so that if the signal is lost the ESC will remove power from the motor.

If it was noise, then it was consistent noise. From the time when I lost control of the throttle to the time when it hit my neighbor's car, the RPM of the motor was not varying, so to me it seems like it couldn't have been glitching from noise.

So if you lose signal, the esc is suppose to shut down power to the motor? Or the servo's too? I'm assuming just the motor.

MetalMan 11.11.2006 01:58 AM

Since the Mamba Max doesn't have any control of the servo(s), it would just be the throttle/motor.

neweuser 11.11.2006 02:00 AM

That's what I thought. Just wanted tha clarified. I lost signal once and my truck would not move, it was pretty far away, but I could see my wheels moving back and forth! LOL

BlackedOutREVO 11.11.2006 03:57 AM

well ok no exernal fail safe lol it sounds like the mm will do me good lol thats for the help guy's much appreciated

Serum 11.11.2006 05:31 AM

My schulze had a cool feature...

it hit FULL brake once the signal was lost...

Nice if your doing speedruns and your driving underneath electricity lines.....

the brake of the schulze/plettenberg is unbelievable strong..

it shredded some of my diffs..

BlackedOutREVO 11.11.2006 03:49 PM

ouch, and lets say kids around me get new rc cars, tycos i would think for the most part and a few real ones but no near me, what would happen if one of them had the same channel as me??????? would the mm stop because there is 2 of the same channels going into the same speedy???????

aqwut 11.11.2006 05:42 PM

no.. the MM won't get interference.. the kids tycos will....

BlackedOutREVO 11.11.2006 10:48 PM

there will be a few real rc's tho what about those??? same?

squeeforever 11.11.2006 11:28 PM

I wouldn't worry about it...There are 60+ channels, so it shouldn't even be a concern...

BrianG 11.11.2006 11:41 PM

Quote:

Originally Posted by E-MAXX Rock's
ouch, and lets say kids around me get new rc cars, tycos i would think for the most part and a few real ones but no near me, what would happen if one of them had the same channel as me??????? would the mm stop because there is 2 of the same channels going into the same speedy???????

AFAIK, all Tyco (and similar) "toys" use 27MHz and 49Mhz AM frequencies. That's it. They don't have multiple channels for each, just two. Even if you have an AM transmitter, you should be safe because the RF filtering is a bit better than Tycos. The only exception to this to my knowledge is the RadioShack xmods, which do use just about the same AM channels as regular R/C AM channels. As a matter of fact, I used to use xmods crystals in my Nitro Revo since I already had the expansion set.

You should be quite safe with FM and even more so with 2.4Ghz (like Spektrum, Nomadio, and the like).

BlackedOutREVO 11.12.2006 03:50 AM

i was going to buy a jr radio the nice 3 channel one thats synthesied but i didnt lol im going to buy a f-350 high lift its like 100 bucks more and alot more fun lol i was like hmmm a radio i use all the time or new un kit to build then drive and have a sick scale tow rig that i would use YEEEEEEHHHHHH lol


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