Problems with Futaba 3305 servos  
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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Problems with Futaba 3305 servos
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Problems with Futaba 3305 servos - 4/24/2007 3:02:16 AM   
flipstart


 

Posts: 654
Joined: 8/14/2003
From: Andersonville, TN, USA
Status: offline 		I have had several Futaba 3305 servos that have the same problem-after sitting for a while, like over the winter, they act "draggy", don't respond immediately. Its like a delayed reaction, but sometimes their response is normal. The first one was on a pull pull for N-28 for rudder. It started moving in slow motion, check for binding but all was fine. Replaced with 3305 and so far all is ok. Now on the dual elevator setup, one is much slower than the other. Both pushrods are as free as can be. Replace these with 3001s and all is fine.
Friend of mine has had same problem with 2-3305s, they acted basically the same way, sluggish, slow moving.
I know these servos are not reccomended for airplanes, but lots of flyers use them, and Futaba customer service on their forum, say its ok to use in airplanes. Any suggestions as to what could be causing the same type failure??

I have also tested them on the bench after removing from plane and same odd behavior is still there. What's scary is that its not consistent once it starts acting strange, you might move it 10 times, and 9 are ok.
I am thinking about switching out these 3305s, but I have about 6-8 in 1/4 scale planes, seems a shame to waste that much $$, if a solution is out there.


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RE: Problems with Futaba 3305 servos - 4/24/2007 6:31:20 AM   
mtwister


 

Posts: 697
Joined: 11/3/2005
From: Salem , OR, USA
Status: online 		sounds like the pots need cleaning. Alot of electronics if they sit will build up corrosion.

(in reply to flipstart)
       Post #: 2

RE: Problems with Futaba 3305 servos - 4/24/2007 11:12:43 AM   
flipstart


 

Posts: 654
Joined: 8/14/2003
From: Andersonville, TN, USA
Status: offline 		Good idea-I have replaced gears in servos, but have not cleaned any electronics-always avoided that circuit board in bottom. I did a search but did not come up with anything on pot cleaning. Has anyone posted a method for cleaning them??

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REAL AIRPLANES HAVE MACHINE GUNS

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RE: Problems with Futaba 3305 servos - 7/19/2008 7:36:54 PM   
Aero-Junkie



Posts: 21
Joined: 1/24/2003
From: Lower Pottsgrove, PA, USA
Status: offline 		I have this same question. Ive replace 5 of 7 futaba s3010 ht servos this year. their is a little hole on the top of this pot. if I could just find a lubricent,cleaner or something to spray into here I might be able to save some money!

< Message edited by Aero-Junkie -- 7/28/2008 7:29:56 AM >

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(in reply to flipstart)
       Post #: 4

RE: Problems with Futaba 3305 servos - 7/19/2008 7:48:47 PM   
Aero-Junkie



Posts: 21
Joined: 1/24/2003
From: Lower Pottsgrove, PA, USA
Status: offline 		Ya that didnt work!lol

< Message edited by Aero-Junkie -- 7/20/2008 6:35:09 AM >

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***** Hello (Wazzzs"sssupp) - Stuff< you Know,smoking ,drinking a brew,chilling on the simulater! Cool-Cool

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RE: Problems with Futaba 3305 servos - 7/21/2008 1:55:47 AM   
onewasp


 

Posts: 1360
Joined: 12/11/2002
From: USA, USA
Status: offline 		You appear to be holding the motor. The pot element is above your index finger.

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The ground reached up and smote my airplane

(in reply to Aero-Junkie)
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RE: Problems with Futaba 3305 servos - 7/28/2008 7:17:43 AM   
Aero-Junkie



Posts: 21
Joined: 1/24/2003
From: Lower Pottsgrove, PA, USA
Status: offline 		I know this ... The pot is held on by 3 small wires and very bendable. dont really want to be holding it. electronic cleaner from radio shack helped a little bit. I just think futaba 3305 servos are junk! (if you let them sit to long they turn to crap) On the far side of this it could just be about winter storage.this perticular plane and servos sit on the cement floor in the basement. I did notice this servo doesnt have a rubber seal for weather or dust like some servos have. maybe a higher storage my help. Ive also had carbs sieze from winter storage. Basements are usually damp and reap havoc on things.

< Message edited by Aero-Junkie -- 7/28/2008 7:58:36 AM >

_____________________________

***** Hello (Wazzzs"sssupp) - Stuff< you Know,smoking ,drinking a brew,chilling on the simulater! Cool-Cool

(in reply to onewasp)
       Post #: 7

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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Problems with Futaba 3305 servos
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