Hitec 605BB servo question  
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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Hitec/MultiPlex Radios- Ask Hitec Customer Service >> Hitec 605BB servo question
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Hitec 605BB servo question - 7/12/2008 3:31:56 PM   
Beavis



Posts: 58
Joined: 10/29/2002
From: Wellesley, MA, USA
Status: offline
Hello,

I've just finished a 60-90-size plane with the spektrum AR7000 rx on a 5-cell NiCd pack, the JR X9303 2.4GHz tx, and Hitec 605BB servos on all control surfaces. Every time I test the system on the bench, after a few seconds the rudder servo slowly moves almost all the way to the right and stays there. It still responds to tx input but will not center again. If I disconnect the rudder pushrod linkage from the servo arm and start over the test, everything is fine - the servo stays put and responds normally. However, once I connect the control linkage it will do this again. I feel no obvious tension on the linkage. The servo does not "hum" as if stressed by the linkage. I've changed to another Hitec 605BB and it does the same thing. I've "diagnosed" (cycled and centered) both servos tried with the JR Match Maker and they both pass with flying colors. Can an inappropriate pushrod-control horn-servo arm linkage cause that? If so, what should I look for on the linkage, if it does not feel tense? Any input would be greatly appreciated.

Thank you in advance,
Beavis
       Post #: 1

RE: Hitec 605BB servo question - 7/14/2008 6:13:14 PM   
MikeMayberry



Posts: 2844
Joined: 1/15/2002
From: Poway, CA, USA
Status: offline
The linkage should have no affect on the servo unless it was binding. Unfortunatley, this is an odd one and I have no idea what to suggest?!?!? At first I thought it was a bad servo but you said it did it with more than one which rules that out. You might try connecting the rudder to the elevator channel and vice versa to see if the problem follows that channel.

Sorry, I wish I had more for you.

Mike.

_____________________________

Hitec RCD Rep
http://www.hitecrcd.com

(in reply to Beavis)
       Post #: 2

RE: Hitec 605BB servo question - 7/14/2008 9:50:46 PM   
Beavis



Posts: 58
Joined: 10/29/2002
From: Wellesley, MA, USA
Status: offline
Thank you, Mike. I assume that it should not be a receiver issue either, because everything works fine when the rudder servo is not connected to the pushrod.

I'll try the swapping of channels within the receiver...

Thanks again,
Beavis

(in reply to MikeMayberry)
       Post #: 3

RE: Hitec 605BB servo question - 7/19/2008 3:02:31 PM   
Beavis



Posts: 58
Joined: 10/29/2002
From: Wellesley, MA, USA
Status: offline

For those who want to know the final diagnosis and solution to this problem, please refer to the post "2.4GHz mistery glitch", on the general radio forum.

Best,
Beavis

(in reply to Beavis)
       Post #: 4

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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Hitec/MultiPlex Radios- Ask Hitec Customer Service >> Hitec 605BB servo question
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