Re: [Paparazzi-devel] Strange Surging Behavior

[Maik Höpfel]

Hey Jeff,

three things:

- As far as I know, the cable to your speed controller shouldn't have
the 5V rail connected, because then there's issues with the two power
supplies "fighting". I don't know nothing about it, but read about
that at some point and one of the servo cables from CheBuzz came
without the 5V rail connected.
- You're right in disconnecting the throttle. Running the motor
without a prop attached can quickly make it turn too fast, damaging
the bearings.
- In my opinion you don't need a separate BEC. Using one might be
slightly more reliable, but I think that if you have a decent speed
controller, you should be just fine.

Regards,
Maik

2010/7/12  <address@hidden>:
> Thanks Felix,
>
> For testing purposes, I disconnected my throttle so that I didn't destroy my
> table / limbs if the motor started (yes, I should always just take the prop
> off). I didn't even think that I was removing a 5 volt power source that
> gets hooked up to the TWOG! So while testing, the TWOG was trying to power
> everything on its own and overloading??
>
> So am i correct to say that the 5V from the ESC (throttle input) actually
> powers the whole servo rail on the TWOG? ...When I remove my prop and
> connect the throttle input to the TWOG everything works great!
>
> Thanks,
> Jeff
>
>
>
> Quoting "Felix Ruess" <address@hidden>:
>
>> Hi Jeff,
>>
>> BEC is an abbreviation for Battery Elimination Circuit, meaning you
>> eliminate the extra battery for the servos. It is basically just a
>> voltage regulator that produces 5V from your battery. As Maik said you
>> can just use the 5V provided by the BEC of your speed controller.
>>
>> Cheers, Felix
>>
>> On Mon, Jul 12, 2010 at 9:37 PM, Maik Höpfel <address@hidden> wrote:
>>>
>>> Yes, especially digital servos can get very high peak currents. Just hook
>>> them up to the BEC from your speed controller.
>>>
>>> - Maik
>>>
>>> Am 12.07.2010 20:15 schrieb "Felix Ruess" <address@hidden>:
>>>
>>> Hi Jeff,
>>>
>>> to me that sounds like your servos are drawing too much power with the
>>> more rapid corrections of the AUTO modes. Especially since it works if
>>> you have one or two disconnected.
>>> If the servos draw too much current the voltage will break down and
>>> the twog probably resets.
>>> I would recommend to check that and maybe use an extra power source
>>> for your servos.
>>>
>>> Cheers, Felix
>>>
>>> On Mon, Jul 12, 2010 at 7:07 PM, <address@hidden> wrote:
>>>>
>>>> Hello All,
>>>>
>>>> I am experiencing ...
>>>
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