mamba max pro problem

[ta_man]

Originally Posted by BrianG

I don't think it's necessary. The BEC capability is fine IMO for the types of vehicles it was designed for, and the size servo normally found in these vehicles. Making a higher current BEC would require larger components and obviously a larger PCB. If a stronger BEC is needed, it's a simple matter to disable it and run an external one.

I find this rather disappointing. For me, a major selling point of the MMPro was the switching BEC good to 6S (though I only planned to use if for 3-4S). If I have to use an external BEC anyway to run a decent power servo I might as well just just an original MM and the BEC (for 3-4S).

(Reminds me of my Havoc 3S, which, on 3S, needed an external BEC to run a good servo.)

[Happywing]

I've only run my MMP in 1/10 vehicles with servos that are suitable for said 1/10 vehicle. No problems at all. The MMP is made for 1/10. Usually, 200 oz/in servos are not necessary for 1/10. The MMP is fine in the environment that it was designed for.

the mini ste is 1/12, and the servo I use is <200oz-in.

[BrianG]

Originally Posted by ta_man

I find this rather disappointing. For me, a major selling point of the MMPro was the switching BEC good to 6S (though I only planned to use if for 3-4S). If I have to use an external BEC anyway to run a decent power servo I might as well just just an original MM and the BEC (for 3-4S).

(Reminds me of my Havoc 3S, which, on 3S, needed an external BEC to run a good servo.)

I would hate to be in Castle's shoes TBH. People want more and more powerful systems in smaller and smaller packages. It has to be a design challenge to do so!

I just think it's strange this wasn't noticed in beta testing.

edit: just read mike's post. So, I'll drop to 5.5 or even 5v bec output and it should be solved.

[BrianG]

Originally Posted by drkdgglr

I just think it's strange this wasn't noticed in beta testing.

edit: just read mike's post. So, I'll drop to 5.5 or even 5v bec output and it should be solved.

It's not really a "problem", it's the way it was designed. Dropping the voltage will help and adding a capacitor (~10,000uF @ 10V) can also help supplement the BEC under peak loads.

I'd rather limit the load on the bec, so I might just drop to 5v. The 985mg was the smallest servo I had lying around. I forgot I actually used that servo in a Muggy and it did okay. Kind of puts using this servo in the mini ste into perspective...

[Pdelcast]

/sigh

The MMPro BEC is actually just as capable than the MMM BEC, which no one has complained about.

The BEC on the MMPro wasn't designed to run multiple ultra-high-torque servos. It's a 1/10th scale and 1/8 buggy controller.

The current limit is set to about 4.5A on the MMPro BEC, but will fold back if the temps get high. Remember, this is a pretty small integrated BEC.

[sikeston34m]

After my "glitchy" run, I dissected the non-working servo and found it's control board burnt. Even though, it was the first time I ran it, I may have gotten a bad one. I replaced the bad servo, with another MG995.

After turning the BEC down to 5.0 volts, I just took another run. It did not Glitch a single time. Yes, this is running a Pair of MG995 Servos.

I would also like to add, the power delivery of this ESC is really smooth.

This is a light weight, low slung E maxx using a HC 8 Pole 1600kv Heli outrunner geared 14/52 (31 mph). Temps on everything were only slightly warm. The ESC's fan only came on one time during the 30 minute run.

A pair of 6S 26C 2600mah Kong Power Packs in parallel supplied the juice.

As for me, I believe the problems I experienced were to blame on a bad servo.

[muck]

Originally Posted by Pdelcast

/sigh

The MMPro BEC is actually just as capable than the MMM BEC, which no one has complained about.

The BEC on the MMPro wasn't designed to run multiple ultra-high-torque servos. It's a 1/10th scale and 1/8 buggy controller.

The current limit is set to about 4.5A on the MMPro BEC, but will fold back if the temps get high. Remember, this is a pretty small integrated BEC.

because i am new to the large and nice of a ESC, i can use my new MMpro in a 1/8th scale buggy application?

[jhautz]

so.... back to running external BECs. Great.

The more things change. the more they stay the same.