servo current draw
 

I'm looking for an overview on current that popular servos draw.

I have a few myself and I recently found that one of them is drawing a lot more then I expected. I want to know this to just do some math.

I have:

Hitec 7955TG
Savox 1258 TG
Ace DS1015


I know the Hitec:
Operating Speed (4.8V): 0.19 sec/60° at no load
Operating Speed (6.0V): 0.15 sec/60° at no load
Stall Torque (4.8V): 250oz/in. (18kg.cm)
Stall Torque (6.0V): 333oz/in. (24kg.cm)
Idle Current Drain (4.8V): 9mA at stop
Idle Current Drain (6.0V): 9mA at stop
Current Drain (4.8V): 220mA/idle and 3.4 amps at lock/stall
Current Drain (6.0V): 300mA/idle and 4.2 amps at lock/stall

and that is more my Hobbywing BEC is providing. I know it does 5A peaks and the 7955 is prbably not drawing that continuesly but still... I realised there is not much known about this. Should I consider getting a bigger BEC (the CC one) for the Hitec servos?

Now, I recently installed my Savox and it was doing even less on the MMPs internal BEC so it apears as if this one draws even more..... Installed a CC BEC in that car and it now works flawlessly.

What about the ACE? (will be installed in my Mugen with a hobbywing BEC) how powerhungry is that one?

So who has current draw numbers on the other servos?

I run an ACE DS1015 and measured 3.8 amps or so in a Slash 4x4

Was measured with an Eagletree data logger so not sure how accurate they are

Enough to require an external Bec with the MMP or Monster ESC's, tried the cap first but it didnt help

I do use Spekky recievers though which are not good at handling a voltage drop

Cheers

So that tells us that most external BECs are only just coping with the current that those servos draw. Most external BEC do 3A continious and 5A peaks.
crusey, was your measurement an average or was it a peak?

3.8 amps was a peak that I noticed when centering after turning to full lock and letting it go

Enough to drop the voltage on my Spekky reciever to under 4.5v when running either the Trackstar 150, MMP or Monster ESC's

I tried a cap but it made little difference and now run an external bec (ccbec) on all my ESC's

Cheers

Ok, so a hobbywing BEC should work just fine. They do 3A continious and 5A peak (like many external BECs)
I have a few cheap BECs (turnigy and Hobbywing) and they do the job. I was just wondering if I was missing out on performance. I also have a CC BEC in my Slash 4x4 with a Savox 1258TG, motorfan and LED lights. So I figured this setup should need a slightly better performing BEC so that's why I took the more expensive CC BEC for this setup. It performs so well I was thinking maybe the other BEC were not....

:lol::sneaky::D