Go Back  R/C Tech Forums > General Forums > Nitro Off-Road
Futaba Brushless Servos >

Futaba Brushless Servos

Futaba Brushless Servos

Old 06-18-2009, 09:17 PM
  #1  
Tech Addict
Thread Starter
iTrader: (15)
 
xxxtcr's Avatar
 
Join Date: Feb 2009
Posts: 747
Trader Rating: 15 (100%+)
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.
xxxtcr is offline  
Old 06-18-2009, 09:21 PM
  #2  
Tech Master
iTrader: (56)
 
jpz_67's Avatar
 
Join Date: Jul 2006
Location: Texas.
Posts: 1,853
Trader Rating: 56 (100%+)
Default

Originally Posted by xxxtcr View Post
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.
jpz_67 is offline  
Old 06-18-2009, 09:21 PM
  #3  
Tech Elite
 
porkchop's Avatar
 
Join Date: May 2004
Location: o-h-i-o
Posts: 2,830
Default

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
porkchop is offline  
Old 06-18-2009, 09:30 PM
  #4  
Tech Elite
iTrader: (14)
 
ezveedub's Avatar
 
Join Date: Aug 2004
Location: Fort Lauderdale, FL
Posts: 2,415
Trader Rating: 14 (100%+)
Default

Just rock the servo horn. If it has quite some play, you need gears.
ezveedub is offline  
Old 06-18-2009, 09:35 PM
  #5  
Tech Rookie
 
Join Date: Jun 2009
Posts: 15
Default

this is kinda OT but can the futaba bls351 and 451 handle lipo 2s without a regulator?
beer is offline  
Old 06-18-2009, 09:40 PM
  #6  
Tech Elite
 
porkchop's Avatar
 
Join Date: May 2004
Location: o-h-i-o
Posts: 2,830
Default

Originally Posted by beer View Post
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
porkchop is offline  
Old 06-18-2009, 09:44 PM
  #7  
Tech Rookie
 
Join Date: Jun 2009
Posts: 15
Default

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...
beer is offline  
Old 06-18-2009, 09:52 PM
  #8  
Tech Elite
iTrader: (14)
 
ezveedub's Avatar
 
Join Date: Aug 2004
Location: Fort Lauderdale, FL
Posts: 2,415
Trader Rating: 14 (100%+)
Default

I don't think its a good idea. They aren't rated for it anyway. Most likely will kill them quickly IMO.
ezveedub is offline  
Old 06-18-2009, 09:58 PM
  #9  
Tech Addict
iTrader: (32)
 
losi8ight832's Avatar
 
Join Date: Jun 2009
Location: Buckeye,AZ
Posts: 718
Trader Rating: 32 (100%+)
Default

i got them also and love them!
losi8ight832 is offline  
Old 06-18-2009, 10:04 PM
  #10  
Tech Master
iTrader: (7)
 
Nitro$junkie's Avatar
 
Join Date: Jun 2006
Location: Gold Coast, Australia
Posts: 1,420
Trader Rating: 7 (100%+)
Default

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
Nitro$junkie is offline  
Old 06-18-2009, 10:34 PM
  #11  
Tech Lord
iTrader: (148)
 
Frank L's Avatar
 
Join Date: Dec 2008
Location: NorCal
Posts: 12,522
Trader Rating: 148 (100%+)
Default

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.
Frank L is offline  
Old 06-18-2009, 10:37 PM
  #12  
Tech Addict
Thread Starter
iTrader: (15)
 
xxxtcr's Avatar
 
Join Date: Feb 2009
Posts: 747
Trader Rating: 15 (100%+)
Default

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.
xxxtcr is offline  
Old 06-18-2009, 10:39 PM
  #13  
Tech Addict
Thread Starter
iTrader: (15)
 
xxxtcr's Avatar
 
Join Date: Feb 2009
Posts: 747
Trader Rating: 15 (100%+)
Default

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!
xxxtcr is offline  
Old 06-19-2009, 12:21 AM
  #14  
Tech Adept
iTrader: (8)
 
what_stanger?'s Avatar
 
Join Date: Mar 2009
Location: Northern IL
Posts: 138
Trader Rating: 8 (100%+)
Default

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.
what_stanger? is offline  
Old 06-19-2009, 05:11 AM
  #15  
Tech Master
iTrader: (4)
 
Join Date: Feb 2002
Location: Greenwood, IN
Posts: 1,047
Trader Rating: 4 (100%+)
Default

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.
windellmc is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.