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Old Jan 10, 2013, 12:15 PM
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Canada, ON, Ottawa
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4 hs-65MG brand new and Jiddery and doesnt center?

Hi,

Its the first time i buy expensive servos.
I got 4 x HS-65MG NIB from a member here on RCGroups.

Ive plugged an 50A esc to a receiver (FASST receiver, HobbyKing receiver) and a battery to the ESC. no motor connected to the esc, since i only wanted to test the servos. Plugged the servos one by one.
Each servos were making lots of noise, Jidder like crazy, and didnt even come close to center. Each one!! all 4 of them!
There must be something wrong with the setup that ive done?
i flew this receiver a lot in a Peak, and no issue on jiddering or centering...

Any informations or recommendation would be very appreciated.

Thank you,

Max
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Old Jan 10, 2013, 05:29 PM
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was your radio on and bound to the receiver?
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Old Jan 10, 2013, 07:46 PM
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I agree with aurorae. Sounds like your Rx was not providing a signal to the servos. It is unlikely that all four would go bad. If you have one, you should try the setup using a regular 4.8V receiver pack instead of the ESC.
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Old Jan 10, 2013, 08:17 PM
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Joined Sep 2000
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I use metal gear in my Sbach and they do make a lot of noise but if I tap the aileron, elevator or rudder what ever one is buzzing will stop. My first plane with MG servos and I can't believe how fast those little suckers are. No matter how fast I move the stick they are right with it. No more sloppy controls.
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Old Jan 10, 2013, 09:43 PM
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Search "fake Hitec servos"
http://www.helifreak.com/blog.php?b=1336
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Old Jan 11, 2013, 12:47 AM
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As the others have said... Are you sure the Rx was bound to the Tx?.. Were you getting any response at all from the servos? Did you try a 'known good' servo to rule out any issue with the Rx or other components?

Fakes is a possibility but I'd not jump to that conclusion until you have done more testing.
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Old Jan 11, 2013, 07:57 AM
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Canada, ON, Ottawa
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All right,
Thanks all for the replys.

My radio was on and it was bound to the receiver.
Its a Futaba 7c, with a hk orange receiver.

Maybe i need to plug a motor to the ESC???

Ill try with my FS617 or something... its a genuine FASST receiver... maybe its the issue...

Ill try with a HS-45HB and a couple of HXT servos, to make sure the receiver/transmitter isnt faulty.

I agree a 100% with FlyingW : It is unlikely that all four would go bad.
I cant beleive that all 4 servos are bad... and they seems to be real ones as well...
They came in the cardboard packing instead of the nice platic ones... like my hs-45s...

starcad : If you Tap the ailerons? what does that mean?
And, even if they make a lot of noise.... do they center perfect?

I will loook if there is a date sticker on them...

Thank you all !

If you think of something i should try, please let me know.

Max
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Old Jan 11, 2013, 10:38 AM
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You don't need to attach a motor to the ESC, the receiver should power up ok.
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Old Jan 11, 2013, 11:49 AM
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OK,.my first guess was wrong. How about:

Are you sure all the connections are the correct way?
What channels are you plugging the servos in to?
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Old Jan 11, 2013, 11:59 AM
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Tucson, AZ, USA
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Quote:
Originally Posted by XstarWake View Post
All right,
Thanks all for the replys.

My radio was on and it was bound to the receiver.
Its a Futaba 7c, with a hk orange receiver.

Maybe i need to plug a motor to the ESC???

Ill try with my FS617 or something... its a genuine FASST receiver... maybe its the issue...

Ill try with a HS-45HB and a couple of HXT servos, to make sure the receiver/transmitter isnt faulty.

I agree a 100% with FlyingW : It is unlikely that all four would go bad.
I cant beleive that all 4 servos are bad... and they seems to be real ones as well...
They came in the cardboard packing instead of the nice platic ones... like my hs-45s...

starcad : If you Tap the ailerons? what does that mean?
And, even if they make a lot of noise.... do they center perfect?

I will loook if there is a date sticker on them...

Thank you all !

If you think of something i should try, please let me know.

Max
Yeah, they center it's like they are searching. I use the same radio as you and fly several other planes with it. Only the MG's buzz and if you tap the control surface of the offending servo the the buzz stops. No binding or anything just he servo seems to be hunting.
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Old Jan 11, 2013, 12:06 PM
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Quote:
Originally Posted by starcad View Post
Yeah, they center it's like they are searching. I use the same radio as you and fly several other planes with it. Only the MG's buzz and if you tap the control surface of the offending servo the the buzz stops. No binding or anything just he servo seems to be hunting.

You sure they are not digitals?.. It's usually digitalis that buzz around centre
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Old Jan 11, 2013, 01:32 PM
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Canada, ON, Ottawa
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OK, again, Thanks for all those replys.

aurorae :
Connection on the receiver was done properly. If ive connected them the wrong way, they would just not operate
Ive plugged all 4 servos on chanel 1 2 and 4 to test.
Chanel 3 was for my ESC.
All 3 channels and all 4 servos were not good.

there is a good 3 to 5 mm on the ARM that is not centered... i compare them to HXT900 and the 65MG and a peice of shizel? that cant be true...

Starcad : Ive tapped the controle, and it does stop from making a lot of noises. But, i needed to "Tap" about 5 to 10 times before the buzz stopped. Is that normal? And even if it did stop buzzing, they are sooooo not centered.... scary

From the seller of the servos : Max those are digital servos. They make a lot of noise and jump a little. It's just the nature of them.

To be honest, i dont really care about the jiddering... but not to center even close to a neutral point... that scares me a lot.
Im building a 3DHS and i dont wanna put peice of shizel servos.
I got all the good parts for it (omega motor, Hacker 40A esc... all good stuff...)

I paid the same price for the airframe and the servos...

Im kinda dissapointed...
Ill try to make a video and show you guys.

Ive plugged the servos and there were loose on my wooden table, and they were going from right to left jiddering like crazy...

Peace and thanks for everything guys!
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Old Jan 11, 2013, 02:12 PM
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When you say that they aren't centred, could that not simply be that the arms need turning a few teeth on the splines? providing they constantly return to the same position then that's probably all that needs to be done.

The seller is right, digitals do tend to buzz and jitter slightly around centre, if it's just a slight 'tremble' it's nothing to worry about. .
If they are digitals then they are HS-5065MG, not HS-65MG

Steve
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Old Jan 11, 2013, 02:18 PM
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Ok, lets say i plug the servo in the aileron, move aileron to full right position. Then return to center. I see that the arm is not centered (about 2 tp 3 mm off the right). I go full left, then move back to center on my Tx. Now the servos is not centered (about 2 to 3 mm off the left).

I dont know if im clear enough...
Lets say, i remove the arm, center the servo. Put back the arm centered.
Then do my test? ill see a big NON-Centering issue....

Ill really try to make a quick video.
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Old Jan 11, 2013, 02:24 PM
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Quote:
Originally Posted by XstarWake View Post
Ok, lets say i plug the servo in the aileron, move aileron to full right position. Then return to center. I see that the arm is not centered (about 2 tp 3 mm off the right). I go full left, then move back to center on my Tx. Now the servos is not centered (about 2 to 3 mm off the left).

ok.. assuming that it's not due to sticky/binding surfaces and/or sloppy linkages then there is something wrong there. Digital normally have very precise centring.
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