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Old 06-18-2009, 09:17 PM   #1
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Default Futaba Brushless Servos

I have been running a pair of futaba brushless servos in my 1/8 scale losi 2.0 buggy, and all has been fine (have been running them since silverstate) Normal once a week race use, and now my steering servo has the "jitters"(shakes back and forth really fast for no reason) Has anyone else had this problem, I have seen it with other cars and servos, They say its normal, but this is the first time I've ever seen this with any of my servos. I run a bls351 on steering, and a 451 on throttle.
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Old 06-18-2009, 09:21 PM   #2
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I have been running a pair of futaba brushless servos in my 1/8 scale losi 2.0 buggy, and all has been fine (have been running them since silverstate) Normal once a week race use, and now my steering servo has the "jitters"(shakes back and forth really fast for no reason) Has anyone else had this problem, I have seen it with other cars and servos, They say its normal, but this is the first time I've ever seen this with any of my servos. I run a bls351 on steering, and a 451 on throttle.
Its pretty common in futabas. The gears have developed slop and the motor is having a hard time finding center because of the slop, hence the shaking. After a few gallons my futaba steering servos would do the same thing. Just put in a new plastic gear and inspect the main gear and the shaking should go away. It did for me anyways. Great servos just have to watch the gears.
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Old 06-18-2009, 09:21 PM   #3
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most the time it means the fets or going bad but there by far the best servos out i have 12 of them and love them
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Old 06-18-2009, 09:30 PM   #4
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Just rock the servo horn. If it has quite some play, you need gears.
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Old 06-18-2009, 09:35 PM   #5
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this is kinda OT but can the futaba bls351 and 451 handle lipo 2s without a regulator?
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Old 06-18-2009, 09:40 PM   #6
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this is kinda OT but can the futaba bls351 and 451 handle lipo 2s without a regulator?
i been told yes but i yet to try it at 6volt there fast enough for me i dont think i could run them at 7.4
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Old 06-18-2009, 09:44 PM   #7
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thanks for the reply porkchop... i think 2s lipo is 8.4. im really tempted to try it without a regulator but im afraid it might burn out the servos and receiver...
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Old 06-18-2009, 09:52 PM   #8
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I don't think its a good idea. They aren't rated for it anyway. Most likely will kill them quickly IMO.
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Old 06-18-2009, 09:58 PM   #9
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i got them also and love them!
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Old 06-18-2009, 10:04 PM   #10
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this regulator will give u the most power out of your servos running lipo most 7.4V pac lipos are 8.4V a peak charge thats why its unsafe to use on your gear unregulated http://www.amainhobbies.com/product_...or-with-Switch
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Old 06-18-2009, 10:34 PM   #11
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AHH so the futaba's have the JR jitters hehehe
All my JR 9100 servos did that too. I had another racer tell me it was the JR jitters.
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Old 06-18-2009, 10:37 PM   #12
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sounds like it might be the plastic gear wearing out, that steering servo takes a beating, I'll see if I can trouble shoot it and get back with you guys, Maybe the'll cover it under warranty.
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Old 06-18-2009, 10:39 PM   #13
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Quote:
Originally Posted by beer View Post
this is kinda OT but can the futaba bls351 and 451 handle lipo 2s without a regulator?
I run mine direct with a losi lipo, and have had no problems, until now I dont think the steering servo is burning up, but I also ran airtronics servos until these ones, and never had problems with them burning up IMO. but run a reg just to be safe!
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Old 06-19-2009, 12:21 AM   #14
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If its under warranty still, I'd send it in just because it would be a free fix.

I had a 9351 on steering for 2 years and it had the problem you speak of, It ended up being a metal gear that had 2 teeth missing. It wasn't that bad driving the car to be honest. I noticed it only in the neutral position. I figured it was just 'slop' over two years worth of time. Who knows how long it would have stayed working in that 'good enough' state.

Now the BLS351 is on steering and that repaired 9351 is on throttle/brake. So far my BLS351 hasn't had any slop develop yet.
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Old 06-19-2009, 05:11 AM   #15
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My 9351 developed the shakes after a year on truggy steering. It turned out to be the main gear had worn down a couple of teeth at center. Replaced that gear and all was well.
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