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#1
07-04-2012
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Mamba Max Pro Cutting Out
My son's Mamba Max Pro has started cutting out sometimes during racing another racer who uses the same system said that by fitting a stutter stopper to the receiver this would stop it cutting out phoned our local shop who seemed to know something about it but wasn't totally sure is it a simple case of soldering a capacitor to a servo lead or is there more to it?
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#2
07-04-2012
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It sound like you may have glitching.
Probably you need one to plug into your spare receiver port. You could solder one to a lead although it's probably more hassle. I bought this one on eBay recently http://www.ebay.co.uk/itm/3208596953...#ht_1819wt_871
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#3
07-04-2012
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When you say the car cuts out, do you lose power to the motor, servo or both.
The mamba max pro is prone to bec issues (power supply to receiver) As said above, you can fit a capacitor to a spare channel to buffer/smooth out the heavy voltage load, or you can fit an external bec such as the mamba bec. I fitted this to my mamba in my short course and it cured all my issues.
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#4
07-04-2012
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Quote:
Sometimes it is just the throttle and sometimes it is both. Lee
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#5
07-04-2012
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It may very well be a bec issue, as the servo draws heavy current the bec inside the esc shuts down for a second, and if combined with spectrum causes a brief moment of failsafe
One cheap way to test is by either fitting a capacitor into a spare channel, or fitting a separate rx battery into the receiver, but make sure to remove the RED wire from the esc to rx wire on the plug first. If either of those fix it, chances are its the esc's bec system. These are very common to fail and when good only provide 2.5-3.0 amps at best. I'd personally recommend replacing with the mamba external bec as its capable of handling 7amps all day which will power the thirstiest of servos.
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#7
08-04-2012
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one thing to check is the supply voltage setting on the MMP.
There's a programming setting that alters the BEC voltage, and default is 5.5v My Futaba FASST system & the MMP, only ever worked reliably if this was set to 6v. Check the recommended voltage supply setting for your receiver, but it might be as easy as this quick change to the Castle.
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#8
08-04-2012
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The problem with raising the BEC to 6V is that the amount of current available goes down, making the problem worse. I had to drop mine back to 5.5 from 6 cause the servo just drew too much.
I too am going external BEC in time but for now dropping the voltage worked for me. What servo and radio is it?
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#9
09-04-2012
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I didn't experience any cut-out when running on 6v.
5.5v wasn't enough for the Futaba R603FS or R603FF receiver. (I think they want as close to 6v as possible...) Servo was the BLS451 so not a slouch but is good for low current draw, apparently. It may have been a lucky combo for me, having those three together. One other thing I've remembered. Did get some glitching when running the Lipo Cutoff too high (3.3v and above). Always ran that at 3.0v and chose to never run the car long enough for it to reach the cutoff. Don't know if any of that will fix it for you, but it might shed some light...
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#10
09-04-2012
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Donutt I wasn't having a dig with my comment, hope you didn't take it that way
 The OP stated his problems and I was saying that I'd he raised the voltage he'll have even less current for the rx. I'm interested in what you say about your servo, I might look into those futabas. Incidentally I tried an old Kiel fet servo that ran perfectly well on a Carson esc with my MMP yesterday and it browned out straight away 
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