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Logo 500 › Problems with Logo 500 3D
06-02-2012 02:30 PM  6 years agoPost 1
crunch

rrApprentice

Peterborough, England

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Hi Guy's

Im about had enough of my 500 now can any one help.

The Problem started about a year ago and is as follows:
when flying the heli,it will for no reason after a minute or so it just starts doing a slow ish piro to the right,some times half a piro and some times more than one.it can kick in at any time no matter which way up the heli is.

first i changed Vbar for a new blueline,It did exactly the same.
i earthed out all the tail back to neg wire on speed controller.
still did the same.
then i used graphite on every thing,belt gears etc. still does it.
then i change tail servo from one of my other models.

yes it worked, for about 10 flights. its now doing it again the same.
surly not 2 faulty servos?

then i changed all bearing in model, and in motor.
Please any one with any advice before i thrash it with a hammer.
This is my set up:
Logo 500 3D
full Vbar blueline
2 Satalite receivers
cyclic servos futaba 9252
tail futaba 9256
jazz kontronik 80 with heat sink
seperate BEC
thunder tiger obl 43/11 motor

many thanks Paul

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06-02-2012 04:20 PM  6 years agoPost 2
Raydee

rrKey Veteran

Western New York

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Paul have you went over the tail and made sure everything is smooth and that the bearings are good? It almost sounds like the tail grips are locking up intermittently in flight. My buddy was having some tail issues that we could not figure out. I ended up putting my tail on his heli and it was smooth again. We are going to replace the bearings and the grips on his to see if that was the problem.

The Future of Nitro is ELECTRIC

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06-02-2012 04:25 PM  6 years agoPost 3
dahld

rrKey Veteran

Bakersfield, CA, USA

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Just a shot here...do yo have the correct servo selected in the V-Bar's set-up menu for the servo you are using?

I've seen some weird servo behavior from this being set wrong.

???(-: Dave

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06-02-2012 04:28 PM  6 years agoPost 4
crunch

rrApprentice

Peterborough, England

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hi yes i replaced tail grip bearings and it does run smooth, i know when the load is on them things are different.

but like i said 10 flights were good after changing servo.
then it was the same.

thanks for your thoughts

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06-02-2012 04:39 PM  6 years agoPost 5
crunch

rrApprentice

Peterborough, England

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hi dave

yes have it set on correct servo,

do you think that the motor or esc could give off any interference
that could cause this to happen

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06-02-2012 05:20 PM  6 years agoPost 6
dahld

rrKey Veteran

Bakersfield, CA, USA

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Probably not...at least I've never seen or heard of it.

Another thought. What does your event log and vibration look like. Drift is often the result of vibration getting to the sensor...meaning there is a vibration issue somewhere on the heli effecting the sensor.

(-: Dave

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06-02-2012 05:33 PM  6 years agoPost 7
crunch

rrApprentice

Peterborough, England

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dave

just checked log and all good health,

2 or 3 antena switch overs

1 raised vibration

so nothing there, any more ideas

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06-02-2012 06:58 PM  6 years agoPost 8
crdhelipad

rrApprentice

Rio Rancho,New Mexico,USA

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radio
what radio transmitter are you using ?

I've seen bad gimble pots giving a slight input to the receiver

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06-02-2012 07:56 PM  6 years agoPost 9
crunch

rrApprentice

Peterborough, England

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hi

i am running dx7, but i have 3 other models 2 with vbar's
one without.
they are all fine,so dont think its that.
but thanks for input

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06-02-2012 09:18 PM  6 years agoPost 10
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

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you say you grounded, but did not help. but, spraying with graphite did. this tells me it could be static.

did you take a meter to the heli and make sure it was grounded properly? sorry i don't know the 500 intimately. but, the 600 has an idler bearing that runs on the to of the tail belt at the rear housing. if this is the case on the 500, check continuity from the point on the bearing to belt contact race to the motor mount (presuming you've grounded to the motor mount), and to the negative of your ESC. aside from poor connections, i've also found depending on that rear bearing some are more conductive than others.

if it ain't broke, break it.

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06-02-2012 10:25 PM  6 years agoPost 11
Josh Kussman

rrApprentice

Superior, NE

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if you have another servo around i would try that again, just a thought that your servos are getting weak after heating up.
i replaced a jr8900 tail servo once because it was giving be problems with a new one and it was bad right out of the package, so it can happen.

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06-03-2012 09:43 AM  6 years agoPost 12
crunch

rrApprentice

Peterborough, England

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Hi using graphite didn't make any difference
And yes I have put meter from bearing to neg wire
And connection is good.
But thanks for input.

I think I'm going to go with Josh and try another tail servo
See how that goes.
I will report back with my findings as it might help
Some one else.

Thanks for all input
Paul

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06-03-2012 06:00 PM  6 years agoPost 13
Josh Kussman

rrApprentice

Superior, NE

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On your vbar tail settings in expert are your rcdeadbands set the same as your _other helis vbars ? Because if they are higher or lower it will read your transmitters inputs different. U can set it to ignore small inputs from pots.

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06-16-2012 11:04 AM  6 years agoPost 14
p4ddy

rrApprentice

southampton uk

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Any luck yet?? My tail issue (piro & go left & right without input at random) was a bad 8900G It worked perfect on the bench & in flight but every so often it would just go nuts. Since then i removed my anti static mod & never put Graphit33 on the belt either & i've never had any issues since using a BLS254. Send the servo off for testing as at least it will eliminate the servo

Almost a 3D champ

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06-16-2012 07:17 PM  6 years agoPost 15
crunch

rrApprentice

Peterborough, England

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hi

ive now put a new futaba bls254 servo in logo, just waiting for weather to break so i can try it.

i will let you know when i have flown ,

thanks paul

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06-17-2012 12:18 AM  6 years agoPost 16
Doc_K

rrNovice

England

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Sorry, was going to suggest trying another Tx but I just noticed you have answered my question with flying other models.

It may still be worth increasing the rc deadband in the tail group by two points for a test flight.

Post your complete tail settings.....somebody may spot something. Have you got your mechanical set-up as close as possible to 100 / 100 on the throw?

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06-17-2012 05:59 PM  6 years agoPost 17
crunch

rrApprentice

Peterborough, England

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hi guys

just tried logo 500 with brand new futaba bls 254 and 30 seconds in to flight just started to piro to the right on its own. one thing i did notice is that while it was piro on its own the rudder stick did not work
then after 180 degrees i had control again.

then with in a couple of second in started again.

HELP HELP HELP HELP

the only things i haven't changed is bec, motor and esc.

is it possible esc or motor could be interferring with vbar.

nothing is coming up on the vbar log, all good health and 1 antena switch over. no vibration or any other faults.

thanks paul

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06-18-2012 04:57 AM  6 years agoPost 18
crdhelipad

rrApprentice

Rio Rancho,New Mexico,USA

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power to v-bar
you said you are running a bec and did you remove the red power wire from the jazz to v-bar ? because your not suppose to use power from bec and power from esc. well that's what manual say's for jives, not sure for jazz or if even has a built in bec

I read somewhere that will cause some trouble

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06-18-2012 01:20 PM  6 years agoPost 19
crdhelipad

rrApprentice

Rio Rancho,New Mexico,USA

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jazz ?
exactly what speed control are you using ?

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06-18-2012 04:47 PM  6 years agoPost 20
crunch

rrApprentice

Peterborough, England

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Hi
Yes removed wire from Esc and only using power from bec

The esc is the jazz 80 with heat sink on it.

This was one of my friends models which flew
Fine for a year. Then it wasn't used for a year
Then I got it and it was good for a month or so
Then the problems started.
And won't go away.

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