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HiTec servo problem

Old 09-13-2006, 08:59 PM
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dutchalltheway
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Default HiTec servo problem

Ok guys, I have a problem with a brand new servo... []

Today I installed a brand new HiTec servo with karbonite gears in my Funtana, on the rudder.

This is what got my attention:
The servo is working, BUT...if you move the rudder to the right and let go of the stick, it moves back PAST neutral, a little to the left and then finally to the neutral position!!
If I move then rudder to the left and let go of the stick, it will return immediately to neutral!!

So...one side responds fine..the other one passes neutral, travels slightly to the left and then to neutral!!

Any of you guys have an idea what is going on with this servo??[]

Your help is well appreciated!!
Old 09-14-2006, 03:50 AM
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bob_nj
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Default RE: HiTec servo problem

Is there an extension on this servo?
If so, and just for the sake of argument, either try a different extension, or just try the servo without
an extension and see what happens.

What you are describing has happened to me beofre when the extension wasn't
good quality, or the contacts on the pins was dirty.

Let me know, and good luck_bob
Old 09-14-2006, 04:42 PM
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Planeclothes
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Default RE: HiTec servo problem

This has happened to me with either Futaba or Hitec servos, and it's always due to a faulty servo extension. As bob_nj stated it happens when contacts are dirty or simply the extension is not good quality. I remember once I almost sent a Futaba 3305 for repairs after it became erratic and lost torque and then I found out all I needed was a good quality servo extension.
Old 09-14-2006, 05:33 PM
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mglavin
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Default RE: HiTec servo problem

Gentlemen,

Thanks for the help, BUT please remember this is the Hitec Factory Support Forum. RCU members use the Factory Support forums to garner information from factory authorized Representatives. Accordingly members are discouraged from answering questions in these forums unlike the open discussion forums.
Old 09-14-2006, 05:35 PM
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dutchalltheway
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Default RE: HiTec servo problem

Cool guys, let me try that this evening right away.
I so hope that this is the case. I hate to spend $9 in postage to get the darn thing insured-send out kinda deal.

Thanks for the info..I'll let you guys now what happened...
Old 09-14-2006, 05:37 PM
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mglavin
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Default RE: HiTec servo problem


ORIGINAL: dutchalltheway

Ok guys, I have a problem with a brand new servo... []

Today I installed a brand new HiTec servo with karbonite gears in my Funtana, on the rudder.

This is what got my attention:
The servo is working, BUT...if you move the rudder to the right and let go of the stick, it moves back PAST neutral, a little to the left and then finally to the neutral position!!
If I move then rudder to the left and let go of the stick, it will return immediately to neutral!!

So...one side responds fine..the other one passes neutral, travels slightly to the left and then to neutral!!

Any of you guys have an idea what is going on with this servo??[]

Your help is well appreciated!!
As others accurately alluded to the problem may simply be an extension. That said in some cases this problem is function of the TX or more specifically the rudder stick gimbal/potentiometer assembly. Have you tried another servo to duplicate your findings? Also try the servo on another channel to compare results as well.

Which specific Karbonite geared servo model are you using?
Old 09-14-2006, 06:37 PM
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bob_nj
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Default RE: HiTec servo problem

Sorry Mike

Won't happen again...


Old 09-14-2006, 08:04 PM
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Planeclothes
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Default RE: HiTec servo problem

Oops, sorry. I was doing a search about Hitec servos and somehow got this link. I wasn't aware this was an exclusive forum.
Old 09-14-2006, 08:23 PM
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dutchalltheway
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Default RE: HiTec servo problem

Hello Michael,

I use a HS-635HB servo..in fact..I use those on 2 of my planes.
I disconnected the extension I used and attached the servo straight to the RX....It still "bounced" before returning to neutral. I connected another brand new HS-635HB servo to the RX...this one did not show this "boucing" behavior. I then attached the servo extension to this servo, and it continued to respond normal. I'm afraid this behavior is servo-related[]
What do you suggest???
Old 09-16-2006, 09:56 PM
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mglavin
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Default RE: HiTec servo problem

Yep, sounds like you got a bum servo....

Can you return the servo to the place of purchase for an exchange? Hitec allows over the counter exchange on NEW problematic product.

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