Nervous Tail

[GimpyGolden]

I am having a bit of a time nailing down the tail on my A5.5.
Running Demon 3X on Ver 201, a BLS251 @17mm and KBDD 96mm's at ~2600 on the head.

The tail seems to hold well in fast backwards but sounds very nervous like to high gain or a Goblin tail.
I am not able to get it to hold solid so far on punch outs or even quick collective jabs.
Everything seems nice and free. My next course of action will be to use a 'Revo Mix' in Demon software.
Any other suggestions before I go there? Maybe try some 105's even at this head speed?

[Bubba Gump]

Take those kbdds off had this same problem with thosetail blades before. Try dropping p gain on the demon I don't think you can change I gain on the demon

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[GimpyGolden]

Thanks Forrest, I'll give it a go tomorrow.

[Bubba Gump]

What's you tail gain at in the diagnose tab?

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[livedemon]

gimpy i am running the demon too set ur p gain to 17 ,roughly 50 on main gain at 2700 rpm and yes u have to use revo mix i used 2 points tail is rock solid ...without the mix u will have a little blowout ...but the revo mix sorts that out

[GimpyGolden]

Originally Posted by Bubba Gump

What's you tail gain at in the diagnose tab?

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Main Gain has been as high as 80 lowering P gain to 13 to compensate.
Had to do Revo at 3 or 4 to get a decent hold but I'm still not happy with it as it is.

Originally Posted by livedemon

gimpy i am running the demon too set ur p gain to 17 ,roughly 50 on main gain at 2700 rpm and yes u have to use revo mix i used 2 points tail is rock solid ...without the mix u will have a little blowout ...but the revo mix sorts that out

I will give your settings a try.
If I PM you my email would you mind sending me you full setup file to have a boo at?

[livedemon]

yup no problem give me ur id,the demon is a awesome gyro even at low head speeds i doubt my gain is above 60 in the gyro with 17p gain and 2 on revo its rock solid ...running i think 50-60 on the head gain idk haven't connected to pc for a long time since it was already set up well

[GimpyGolden]

Got the file, thanks. Are you also running FW 201?
Looking at your servo endpoints I see they are 75 and 81 versus my 120 and 110.
What distance are you out on servo horn?
I am right at 17mm using Mikado carbon arm. I may try stepping out to 20mm hole if I don't see any progress with tuning.

Rigid tab we are both the same using Popo's recommended settings for 550/600.
My Head gain is 63 if I remember.

[livedemon]

Yes I think they are 20mm on the cyclic ....63 + gave me lot of head wobble

[GimpyGolden]

I am at 20mm on the head but 17mm on the tail.
Where are you running your tail ball at?

[livedemon]

17mm on the tail anything close or far causes some really unrealistic settings in the demon :p

[livedemon]

Wait a min does the manual say 19 or 18mm am running whatever the manual says and its good for the demon

[Bubba Gump]

The Manuel says 17 I believe for the tail and 20 for the head.

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[GimpyGolden]

Originally Posted by Bubba Gump

The Manuel says 17 I believe for the tail and 20 for the head.

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Yup!

[GimpyGolden]

Originally Posted by livedemon

17mm on the tail anything close or far causes some really unrealistic settings in the demon :p

Weird then we have such different endpoints. Are you using full slider travel?
I'll double check mine to be sure.

[simonvaamonde]

I'm using the ebar and I have a solid tail on 2300,2500 and 2600 rpm but with stock KDS carbon fiber 95, arm on 17, stock servo.

Since Livedemon has your same controller will be a good idea to find out what servo is he running and what tail blades to try to be fair to the fbl controller.

Thanks!

[livedemon]

am using 3x with stock blades 17mm ball dist and yes there is a slight offset in the mechanical setup of slider ...i hink 2-4 degrees it gives me equal stop on both sides and a firm tail with just 2 revo mix and am using rjx HV servos stock arm last hole has 17mm distance ...cyclic metal stock servo arm second last hole having 20mm ... and my travel is setup just before the tail starts to bind near the tail case

[GimpyGolden]

Weird we have same horn length but such different end points.
Guess the servo makes up the difference.

[livedemon]

yup it has got to be the servo ...whats the speed on your tail servo cause i guess .01 sec difference will cause different values to show up in the settings

[GimpyGolden]

http://www.servodatabase.com/servo/futaba/bls251

Can't see how speed would effect endpoints. Resolution would. If mine had finer res, more steps it could be the cause.

I will try your gain settings with my servo setup and see where it gets me.
Was hoping to get out today but it is friggin snowing (again) up here and is just depressing. Monday was 23* Celsius and today flurries, Blast this never ending winter.