mamba max pro problem

[BrianG]

Originally Posted by sikeston34m

How many amps is the MM Pro BEC supposed to be good for?

I just did a quick test with various loads with the BEC set for 6v:

5.94v unloaded
5.76v @ 0.48A
5.72v @ 0.64A
5.70v @ 0.95A
5.63v @ 1.87A
4.16v @ 2.77A

Not sure exactly what point the BEC voltage hits its max, but I would say right around 2A. As you can see, the output falls dramatically somewhere around there.

[sikeston34m]

Originally Posted by BrianG

I just did a quick test with various loads with the BEC set for 6v:

5.94v unloaded
5.76v @ 0.48A
5.72v @ 0.64A
5.70v @ 0.95A
5.63v @ 1.87A
4.16v @ 2.77A

Not sure exactly what point the BEC voltage hits its max, but I would say right around 2A. As you can see, the output falls dramatically somewhere around there.

Thanks Brian,

This explains what I witnessed.

A High Torque Servo is likely to draw more amperage than this, especially when fed more than 5 volts. And especially a Pair of High Torque Servos.

Hmmm....... I thought the Internal BEC would be more beefy than this.

Is this a firmware issue? I was running version 1.2, since I read there were motor starting issues with version 1.3.

nope i dont think so i ran 1.24 and still did it , i went back to .22

[sikeston34m]

Originally Posted by BrianG

I just did a quick test with various loads with the BEC set for 6v:

5.94v unloaded
5.76v @ 0.48A
5.72v @ 0.64A
5.70v @ 0.95A
5.63v @ 1.87A
4.16v @ 2.77A

Not sure exactly what point the BEC voltage hits its max, but I would say right around 2A. As you can see, the output falls dramatically somewhere around there.

There are several other factors of actual running that will affect these results.

If your tests were quick, the ESC was not up to operating temperature. With the ESC powering a drive motor and carrying an amp load, the BEC circuit temperature will rise just from the heat being given off by the Power board.

What are the results on 6S input voltage?

After signing up to be a Beta Tester for these units, I'm sure several thousand people signed up before me.

In Actual running, it was noticeable, the glitching really didn't set in until after 10 minutes or so. This leads me to believe, temperature affects BEC output.

The "Glitch" would show itself in the form of:

If I were turning, the steering would momentarily stay in that position or the truck would not turn when going straight.

Afterwards, I disconnected the steering and checked for binding. There wasn't any binding.

[suicideneil]

Interesting...

I have seen on my many travels that for high powered servos, esc manufacturers recommend running an rx pack (of sorts) wired to the servo in series ( I think) via a y-splitter, so that the esc was only really providing the signal to operate the esc, with the rx pack providing the go-juice; rather like having a glitch-buster capacitor plugged into the rx.

Not the most compact or elegant solution, but one of three options along with the cap or running an external BEC..