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HelicopterRadio - Servo - Gyro - Gov - Batt › Logictech 6100T Servo Buzz
01-27-2007 08:55 PM  10 years agoPost 1
capman231

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Leicester, NC - USA

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Just finished installing my 6100T and matching servo on my Hawk and this is my settings:

Servo Direction: Normal
Center Trim: 74
Limit Set: 110 / 110
Normal Mode Gain: 45
Head Lock Mode Gain: 45
Flight Mode: F3C
Performance: High
Smooth: 7%
Receiver Type: JR

Radio Is A Spectrum DX7 with AR7000 receiver...

My question pertains to the servo buzzing...With the Heli setting on the bench the servo buzz's in pulses (Not A Steady Buzz) like the servo is trying to find exact center, but the servo arm isn't moving
at all, just vibrating...

I have checked it and it does the same thing with or without the linkage connected, so it's not in a bind...

Also have tried it in different positions by moving the stick and holding it off of center...Any time you stop moving the servo with the transmitter it starts buzzing the second it stops...If you move the servo to it's set limit and hold the stick it doesn't buzz as long as you hold the stick past the set limits in the servo...

If I set the performance to Standard the buzzing quits...

Anyone seen this problem???

Howard

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01-28-2007 02:30 AM  10 years agoPost 2
capman231

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Leicester, NC - USA

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When I asked Logictech this question, here is the answer that I got from them...

Hello

The buzzing is not a abnormally sound.

In flying, it would not give you any problems.

And if you have not a special reasons, do not use as HIGH or HIGHEST on the "Performance". ( STANDARD is a best choice )

Have a good holidays

Logictech

Anyone using any other settings besides "Standard" for their "Performance" settings and if so do you have the buzzing???
Howard

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01-28-2007 11:48 AM  10 years agoPost 3
Tday

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Needham, MA

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I use high. I don't think so---I've not noticed it anyway, but I'll check later today when I'm at the field and get back to you.

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01-28-2007 12:19 PM  10 years agoPost 4
capman231

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Leicester, NC - USA

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Hi Tday,

Thanks for the reply, I was beginning to wonder if anybody actually had one of these Gyro Servo Combos...I have not attempted to fly this setup and I don't think I will...I have been playing with the gyro setup and the servo buzzes and chatters constantly, just worse in some modes...If I set it like you see it in the original post, it buzzes and chatters so much you can feel it when you touch the tail boom...This is not a linkage issue because there is nothing on the servo but an arm and if you just lightly touch the arm it really chatters...In my experience with digital servos over the years this kind of behavior is usually because the servo can't find it's center...There must be little or no dead band in this servo because even though it buzzes and chatters constantly, there is no detectable movement of the servo arm, except for the vibration...

Please let me know what you see at the field today and what your setup is...

Howard

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01-28-2007 12:38 PM  10 years agoPost 5
Tday

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Needham, MA

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I'm definitely not seeing anything like that. I have it on a Lepton and I'd feel that for sure. I'll check it though. I have it set to high, smoothness at 4%, gain at 35%, limits 110 (A) and 120 (B), atv's are 140 with DR so that "volume" indicator is 85 (piro rate), and I run from a 6v bec so the v maybe 5.8.

It does sound like the servo is not right---but I'll get back to you later.

Tom

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01-28-2007 12:41 PM  10 years agoPost 6
capman231

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Leicester, NC - USA

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Thanks Tom,

I running mine from a Duralite Regulator at 5.3V...Let me know what you see today...

Howard

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01-28-2007 01:55 PM  10 years agoPost 7
darksidedave

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niles,MI

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Howard,
try setting the performance to Standard..the higher setting may usefull if the tail blows out in fast backwards flight...
establish a baseline standard first though

also 74 is alot of center trim.....
you should try for a mechanicaly neutral setup
trim to zero and try the arm in all 4 posistions till you find which way gives you 90deg on the linkage

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01-28-2007 02:05 PM  10 years agoPost 8
capman231

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Leicester, NC - USA

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Hi darksidedave,

I have tried it with the performance set to standard and no sub trim at all...The only difference is the buzzing and chattering does seem to be less but it's still enough to feel it when you touch the boom...Because of the high resolution of the servo steps 74 on sub trim is only a slight movement of the arm...but sub trim has no effect on the problem...I have even ran the gain from 0 to 90 and no change...No change with smoothness or mode changes either...

Howard

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01-28-2007 02:31 PM  10 years agoPost 9
Peter Wales

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Orlando Fl

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I had the same problem, until I moved the Tx away from the model. It seems it picks up Rf if you get too close and that upsets it.

Peter Wales
http://scalehelicopters.org

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01-28-2007 02:38 PM  10 years agoPost 10
darksidedave

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niles,MI

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I guess the 6100G servo is just "high-strung"
I have the 6100 combo on a Avant EFX with the DX7 and Arizona regulator so it isnt a DSS compatability issue..
I agree that the Logictech servo is louder than normal..mine is too
I have the Ace 1015 servos on the swash and they are REALLY loud and nervous
It may be the "nature of the beast"?

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01-28-2007 05:17 PM  10 years agoPost 11
capman231

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Leicester, NC - USA

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Hi darksidedave,

If this is normal for this servo it will give new meaning to "High Strung"...This servo actually vibrates enough to feel it when you lay your hand on the tail boom and when you put your finger on the servo arm screw the vibration makes it feel like the whole servo is jumping up and down even though the arm isn't actually moving in the normal way...If you move the servo to the end of it's travel it will be completely quiet and no vibration what so ever as long as you hold the stick full over...The second you start slowly returning the stick to center, the vibration starts even before the servo reaches center...Most digital servos that I have dealt with over the years usually quieten down when you move them off of center, but not this servo...It's like no matter where you have the stick the servo can't quite decide exactly where it's supposed to be...

I bought the gyro/servo combination from HeliProz and they have the servos by themselves so I will get them to send me just a servo for testing and see what that tells us...

Glad to see you are using the DX7, I had wondered about compatibility...

What setup are you using in the Gyro and do you use a performance setting other than standard???

Howard

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01-28-2007 05:27 PM  10 years agoPost 12
capman231

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Leicester, NC - USA

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Hi Peter,

Thanks for the reply, but in this case it's not an RF issue...I have turned the transmitter off and the buzzing and vibration doesn't change...

Howard

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01-28-2007 05:56 PM  10 years agoPost 13
darksidedave

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niles,MI

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servo direction - normal
center trim - 5
limit set - A 140% B 145%
flight mode - F3C
performance - standard
smooth control - 7%
receiver select - JR
gain - 65

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01-28-2007 06:29 PM  10 years agoPost 14
capman231

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Leicester, NC - USA

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Hi darksidedave,

Just for fun, I programmed your setup into my gyro and it didn't make any difference...While I was playing with it, I took the servo out of the mount and laid it down on the table top...When I turned it on the only thing that kept it from "Walking" off of the table was the servo lead, the vibration is bad...

Howard

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01-28-2007 09:27 PM  10 years agoPost 15
Tday

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Needham, MA

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Hey Howard,

Checked things with mine and nothing like that at all. I'm not sure how you work your things, but I'd get another servo and then send that one in for warranty. I tend to keep one on hand anyway for just that reason---but if that's not what you do, it sounds like it should go in regardless. That's not a buzzing sound---that's a problem.

I was going to ask if you'd pulled it from the ship and all that---sounds like you've done all the normal things one can do.

Tom

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01-28-2007 10:12 PM  10 years agoPost 16
capman231

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Leicester, NC - USA

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Thanks Tday,

I normally keep spare servos, but when I ordered the combo from HeliProz they were out of the loose servos...I checked their page
awhile ago and they show them in stock now...I will give them a call tomorrow and order one and see what they want me to do with this one...This servo hasn't even been in the air and I am not going to fly it...The way it is buzzing and vibrating something has to be wrong inside with the electronics or motor...Do you think there is any way this problem could be in the gyro???

Howard

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01-28-2007 10:22 PM  10 years agoPost 17
Tday

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Needham, MA

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Sure doesn't seem like it. I don't think the gyro issues commands to the servo that quickly---maybe one of the more technically saavy rr guys will see this and respond. Why don't you ask heliproz what they want you to do with it. Seems like an unflown product deserves better service than warranty service.

Tom

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01-28-2007 11:11 PM  10 years agoPost 18
capman231

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Leicester, NC - USA

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Hi Tday,

I will let you know what HeliProz says...I don't have to be in a hurry if they want the whole combo back that's all right...The Heli I bought this setup for is still in the box to be built...I was just going to try the gyro and servo on my old heli for the heck of it...
I am glad I did now, because I would be upset if this was keeping me from trying a new heli out...The gyro and servo are only about three weeks old and have never been in the air so I think HeliProz will take care of it for me...

Howard

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01-28-2007 11:35 PM  10 years agoPost 19
Tday

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Needham, MA

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Yeah---too bad it seems like you got a dud. This gyro is really great!!! I just ordered my second today for a new ship I'm building.

Tom

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01-29-2007 02:42 AM  10 years agoPost 20
capman231

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Leicester, NC - USA

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Hi Tday,

I was talking to a friend of a friend this afternoon and come to find out he had just gotten a Logictech 6100 gyro and servo that he hadn't even taken out of the box yet...He came over after supper and brought it to test...We put the servo on my gyro and guess what, not the first buzz or vibration not even with the performance set to "Highest"...Guess that pretty well tells me what the problem is...

One thing I hadn't paid any attention to was servo speed until he mentioned that it looked like his servo was a lot faster than mine...
We watched his through a few cycles then mine, and the difference in speed was very noticeable...My servo must have had more problems than I thought...

Got to talk to HeliProz tomorrow...

Howard

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HelicopterRadio - Servo - Gyro - Gov - Batt › Logictech 6100T Servo Buzz
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