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06-16-2012, 12:40 PM | #1 |
Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK
Posts: 87
| 1/4 scale servo to run straight off 2s Lipo?
OK, I'm sick of burning out servos. (Melted 1 of the 2 chips on PCB :( ) I've now got through 3. I keep robbing the good remaining chip, but I've now run out & another one has fried. I think it's to do with the voltage dropping & then the current increasing to compensate for this & things melting. Anyways...... Since I've already modded my axles to take 1/4 scale servos, is there a 1/4 scale servo that I can run straight off a 2S LiPo & throw the BEC in the bin. Incidently, I went with stupid big servos to deal with my stupid big tires. Thanks inadvance for any help. Newth |
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06-17-2012, 07:17 PM | #2 |
RCC Addict Join Date: Dec 2011 Location: Raleign
Posts: 1,439
| Re: 1/4 scale servo to run straight off 2s Lipo?
Servo City has a few nice charts showing servos and acceptable voltage. Their prices are good to. Just pick if you want Hitec or Futaba and scroll down.
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06-18-2012, 01:23 AM | #3 |
Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK
Posts: 87
| Re: 1/4 scale servo to run straight off 2s Lipo?
Thanks for the reply. That's great. I've been having read up & it sounds like its not uncommon for the hitecs to burn out. I'm a little bit confused though on the servo specs. A few are stating Lipo ready, but the voltages are charted at 7.4v. A fully charged Lipo is at a much higher voltage than that. What am I missing? |
06-18-2012, 08:28 AM | #4 |
RCC Addict Join Date: Dec 2011 Location: Raleign
Posts: 1,439
| Re: 1/4 scale servo to run straight off 2s Lipo?
You know, I ran into that issue as well and couldn't get a straight answer. I guess it's probably worth emailing customer support at the manufacturer. What I keep seeing is that all the "LiPO ready" servos that say they run off of straight LiPO also list 7.4v for the voltage. Technically a fully charged 2S is 8.4v and that's a bit higher than 7.4. I still run a BEC to my servo and let my ESC supply power to receiver. I know this isn't a good answer but I guess if the servo says it's direct 2s capable then it should run at that and if it burns out send it in for warranty. |
06-18-2012, 08:46 AM | #5 |
Rock Stacker Join Date: Nov 2004 Location: Sherwood Forest - UK
Posts: 87
| Re: 1/4 scale servo to run straight off 2s Lipo?
I spoke to one of the shops I use in the uk, they seem to think it'll be fine. I've sent an email to savox to see what they say. I'm currently looking at their 0236mg servo. It's a little bit bigger than my old hitec servo & I only just managed to get onto the clod axles! So I'm not sure it's the right one to go for yet. I just like the idea of ditching the voltage regulator which feeds my servos. Be nice to clean up my electronics & get some reliability back. Last edited by newth; 06-18-2012 at 08:48 AM. |
06-18-2012, 08:51 AM | #6 | ||
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Re: 1/4 scale servo to run straight off 2S LiPO? Quote:
If you were to run off a decent external BEC, I would set it to 7.4VDC, or close to it, since the voltage should not vary much if at all. Quote:
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