DS650 servos and Li-Fe packs

[J-S-Q]

Yeah from what I have been reading it seems I could probably get away with running everything through the Beast, especially as this is only a .50 size
heli. But they do recommend powering cyclic servos separately for high current / HV servos. I'm just running everything at 5 volts for now so I don't
need to separate the tail or throttle servo power. I have an un-used SM Services opto isolator that functions as a separate power bus so I might see
about using that for the swash servos.

If the servos are running on a higher voltage, do they actually end up drawing less amps? The mechanical forces on the servo horns are the same so they should be using about the same power so surely more volts equals less amps? Or am I missing something?

Anyway, yes I've seen the Beast X people suggesting a separate power bus setup. I'm still mulling that over but I do like the simplicity of just running it straight through the Beast X.

[trillian]

If the servos are running on a higher voltage, do they actually end up drawing less amps? The mechanical forces on the servo horns are the same so they should be using about the same power so surely more volts equals less amps? Or am I missing something?

Anyway, yes I've seen the Beast X people suggesting a separate power bus setup. I'm still mulling that over but I do like the simplicity of just running it straight through the Beast X.

Yes, if you can run at higher voltage there will be a lower amp draw. At the moment, if I continue to use the Arizona reg I can only get 6 volts max though. I like simplicity as well whenever possible.

I do have an AR7100 I could put on there and run a LiFe pack, hmmmm.

[cupracing]

What charger does one use to charge liFe packs?

[J-S-Q]

What. Badger does one use to charge liFe packs?

Don't know about Badgers! lol. But my charger is a cheapo GT Power A6 and it has an option to charge Li-Fe's. I think it's a reasonably common feature.

[cupracing]

Whoops! (As he chucks his iPhone across the room)

[sacko]

Badger, lol..

A Cellpro does the job.

[Nick B]

my hyperion badger charges life

[Rctintin]

My Cellpro 10S badger and my PL8 bager will charge LiFe

[Asid]

What about this Badger??

[Rctintin]

Asid, I do worry about you

[Nick B]

Hahahahaha....aint seen that for a while

[Asid]

Asid, I do worry about you

My work here is done

[trillian]

Back to the subject of the Beast X and how much current it can handle, I read about three pages of a thread on HF that gets to the heart of the matter
regarding the BeastX's limits.

The question then is how much current your particular servos will draw in your heli given your flying style.

This is a reply to someone on there from Stephan at BeastX about the issue of current handling in the microbeast;

Hi, you can send 60A over the interconnect then the PCB will start to burn. Typically it can handle 15 to 20 A and only getting sligtly warm. Of course this is like an electrical resistor and the voltage will drop the higher the current. At about 2-3A the voltage drop will be in the range of millivolts. The problem is not the power BUS/PCB. The problem is connecting your power source to the Microbeast unit as this is usually done with only two 0,25sqmm servo wires, AIL and ELE between Microbeast and receiver. These servo plugs only can handle a constant load of 2,5A each without nearly any resistance otherwise the voltage will drop very rapidly. So modern power servos (not especially HV servos, this also applies for example to JR8717 or ACE DS1015) take peaks of 5A what makes 15A peak for 3 swashplate servos and then additionaly you have the tail servo. If you do not supply these with a constant power supply this will lead to extreme voltage drop switching off receiver and Microbeast for a short time. So where should the servos get power from? You have 4 servos with 4 servo plugs pulling the maximum possible load so you should also feed in 4 servo plug style power lines. But there are only 3 ports left -SYS, AIL, ELE. Additionally the longer the power line is and the smaller the diameter of the power lines is the higher will be the loss of voltage from source to servo. Unless the Microbeast has no high power input (for example some DEANS connector at the side) like some receivers do, you should not connect such "extreme" servos directly to the unit. The problem especially with HV servos is that they will consum even more current as on 6V. But as said you can also get in trouble with "standard" servos. I heard that new Savox BLS HV servos will be very very power efficient (even better as Futaba BLS). Such servos can be plugged into the Microbeast directly without any problems.

[sacko]

Just sold my reg and lipo in favour of going LiFe

My only concern is that the voltage holds consistantly at 6.6v, as if the voltage fluctuates the servo speed will be inconsistant.

[jamiem]

Just sold my reg and lipo in favour of going LiFe

My only concern is that the voltage holds consistantly at 6.6v, as if the voltage fluctuates the servo speed will be inconsistant.

I very much doubt you will be able to feel it in flight