mamba maxx?

[MetalMan]

Originally Posted by MetalMan

If the pack gets low enough that the receiver no longer operates, the failsafe in the MM will kick in and stop the motor from spinning. It might take a couple of seconds for it to kick in (my RX pack got disconnected last night, and this is how long it too), but it will kick in.

Actually, I have to render this post as not 100% true. Just a few minutes ago I was driving my Rustler, and broke the antenna tube (75mhz FM receiver). I wrapped the antenna around the base of what was left of the antenna tube, giving me an effective range of about 15-20ft before it would start glitchting. So I was going along, and then all of a sudden I no longer had control. The Rustler was fortunately going only about half throttle (but still at least 25mph) when it hit my neighbor's driving, and skimmed his car. I think it only skimmed the muffler, as I saw some sparks. I'm really hoping that I didn't dent anything, but I will have to wait until the morning to check.

The damage to my Rustler is dented capacitors, which happened when the Mamba Max was ejected after hitting the driveway and the truck hit the muffler.

To summarize, the Mamba Max won't cut off in case of a bad signal. My receiver was sending it ~50% throttle signal, which the Mamba Max did not refuse.

[BrianG]

Originally Posted by MetalMan

...To summarize, the Mamba Max won't cut off in case of a bad signal. My receiver was sending it ~50% throttle signal, which the Mamba Max did not refuse.

Are you sure the signal was in fact ~50% throttle, or might it be random noise that the Mamba Max interpreted as 50% throttle? I'm just wondering if a failsafe would have helped here...

[MetalMan]

Originally Posted by BrianG

Are you sure the signal was in fact ~50% throttle, or might it be random noise that the Mamba Max interpreted as 50% throttle? I'm just wondering if a failsafe would have helped here...

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.

[BrianG]

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?

[neweuser]

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.