Tail servo jerking even in setup mode - HeliFreak
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Old 03-29-2012, 04:49 AM   #1 (permalink)
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Default Tail servo jerking even in setup mode

Hi.

My tail servo (BLS251) is jerking even when I am in the setup mode to set the max. travel. Is that common or is there a electrical problem? I can understand when this happens in the normal flight mode because of the algorithm, but in setup mode?

Cheers,
Nils
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Old 03-29-2012, 06:08 AM   #2 (permalink)
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What voltage? The BLS251 is a 4.8 –5v servo so if you are running more than 5v that would be the problem.
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Old 03-29-2012, 06:11 AM   #3 (permalink)
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At exactly 5V. The jerking is periodically round about 3-4 seconds. In flight everything is fine...
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Old 03-29-2012, 07:02 AM   #4 (permalink)
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I have a MKS BLS990 on the tail and when I'm in setup it kicks randomly every few seconds. Doesn't happen outside setup, and no problems in flight.
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Old 03-29-2012, 07:18 AM   #5 (permalink)
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I've been operating a couple BLS 251 servos for around 2 years on 6v.

I thought that Futaba had even OK'd this.

I "borrowed" a WR voltage step down from one heli to put on another. Much later I found the step down in bag I keep my tach, temp guage and other accessories in.
I realized that 2 heli's with 251's on the tail had been operating on 6v for a while.

Found out later that a lot of guys were doing the same thing so I never changed it.
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Old 03-29-2012, 09:51 AM   #6 (permalink)
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Quote:
Originally Posted by Jamesppp View Post
I've been operating a couple BLS 251 servos for around 2 years on 6v.

I thought that Futaba had even OK'd this.


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Old 03-29-2012, 02:39 PM   #7 (permalink)
 
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=] Futaba have rated the BLS251 @ 6v, mine is into its 3rd season at this voltage, works fine.

it does tick away to itself in setup mode, this is normal.
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Old 03-29-2012, 02:42 PM   #8 (permalink)
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Running my BLS-251 at 6V too.
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