Align 3G flybar less swash problem

[stunks]

Helllo i have just fitted an align 3g flybar less system to my T-rex 700 nitro.I have done the set properly with help so mechanicaly it was set up perfect so we went out today flying to test the heli and as soon as we start up and was about to lift off the heli acted funny and tip over and we didnt know y so we change the blades because they got damage every thing else was ok so we tried it again and it was about to tip over again but we saved it. So what we have done is we took the blades off and tried the heli and up to half stick the heli is fine but as soon as i go one mark above half the hover point the swash starts going mad all on its own with out us touching the stick so we back off and tried it again and the same problem up to hapl its ok hover point one mark above half the swash was going allover the place and we have no idea whats cousing it so if any one out there has had this problem or know of this problem and knows how to solve it ur addives would be great> I hopw i have explained my self so that u could understand what am trying to say


thank u

[asomaro]

I had a similar problem the other day.

It turned out to be a servo cable that had worn on the frame.

It only caused a problem when reaching hover speed, pre checks were fine and then just at the point of take off it tipped over, the faulty cable was on the elevator servo - fixed it an all now ok. I'd check all leads mate!

cheers,

[stunks]

thank u i will check all the leeds just to make sure.

[stunks]

Any one with any more addvise please i need ur help

[stunks]

Help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!

[tourerjim]

Did you do a TX reset before setting up 3G also have you got the latest 3g update!

[machasm]

I think Simon (asomara) is probably on the right lines here. If you have a problem with the electrics that then causes a high current drain (either through a short or other) then this could cause the system to reset or just go plain crazy.
Is it a spektrum rx? If so is it flashing indicating a brown-out or other power issue?
Ade.

[stunks]

I have connected the 3g system to my brand new dx8 and i have got the latest update for the 3g system

[ChrisB]

This could also be a vibration issue or the plugs on either end of the lead from the unit to the sensor either not being plugged in fully or the pins can push the leads out a bit making a bad connection,vibration could also worsen this.

When you check all the cables check the sensor cable as well and see if by wiggling it around you can recreate the fault.

How is the sensor mounted? What pad did you use and is it strapped down this can sometimes work and other times really cause problems?

From problems i have seen before a wild guess would be vibrations causing electrical probems.

Look at this thread from post 16,does your swash behave anything like the one does here although this is just idling?

http://www.rcheliaddict.co.uk/engine...problem-2.html

[stunks]

This could also be a vibration issue or the plugs on either end of the lead from the unit to the sensor either not being plugged in fully or the pins can push the leads out a bit making a bad connection,vibration could also worsen this.

When you check all the cables check the sensor cable as well and see if by wiggling it around you can recreate the fault.

How is the sensor mounted? What pad did you use and is it strapped down this can sometimes work and other times really cause problems?

From problems i have seen before a wild guess would be vibrations causing electrical probems.

when i got home today i change the pad and put it this was one pad then a metal plate and then another pad and then i have strap the sensor down i havent tried it as yet but i will tomorrow and the pins are all ok and connected all the way in.

also just a question u know in the set up manual they say to make sure that ur mid stick at all time lets just say that u were not mis stick by one point can that have an effect

[stunks]

Did you do a TX reset before setting up 3G also have you got the latest 3g update!

i have the latest update and am using a brand new dx8

[ChrisB]

when i got home today i change the pad and put it this was one pad then a metal plate and then another pad and then i have strap the sensor down i havent tried it as yet but i will tomorrow and the pins are all ok and connected all the way in.

also just a question u know in the set up manual they say to make sure that ur mid stick at all time lets just say that u were not mis stick by one point can that have an effect

If i was you i would check it without the blades on again first to be safe,try it strapped and not strapped and see if there is a difference.

Being slightly out from centre stick wont make a lot of difference as long as it is only slightly and either way it would not cause the issue you are experiencing.

Just a long shot here but is the Rx itself Ok or is that new also and unproven its not impossible to suspect that could be the source of the problem too,its unlikely but maybe bear this in mind as opposed to purely suspecting the 3g sysem itself.

[Geek]

i have the latest update and am using a brand new Dx8

There has been 3 updates on the tranny since they have been out.
not that it's that

My flybarless was a bit drunk today.
felt like the vibes from a rich engine causing trouble.
didn't get to the bottom of mine either

[Geek]

Also did you do the 3g setup as Bert said in this video?
push the stick forward and right.
The swash is trying to level when you lean the model?
ie lean to the right the swash goes up on the right?

[coolice]

Hey.

The first thing that comes to mind is the obvious reversed gyro directions, but I am sure you've checked this.
It is of paramount importance to follow the 3G manual accurately, training the 3G unit it's limits on cyclic travel and in which direction it needs to correct for a given fuselage movement.

Second idea, there was a few badly inserted connection pins within the lead going from main unit to gyro sensors, I know as I had one myself :-(
This could explain why all seems fine until lift off at which point vibration levels are higher and if there is a bad connection it's loosing contact and resetting the system. It's easy to check, remove the lead from the 3G units and gently roll back the outer rubber plug covers. On mine I noticed the negative black wires crimped pin was looking different to the other 3, so I removed it as you would a normal servo connector and found it to be bent. It looked like it had been done on insertion but easily missed during inspection.

Power supply to the radio gear is also a point worth mentioning, as like has been mentioned with the increased amp draw on any regulator already fitted a Spektrum setup could suffer brownouts if it that's severe that the voltage drops too low.

Sensor mounting is also important, more so on the IC machines where high frequency vibration is apparent. When my 3G was mounted to my 700N I ran a Spartan mounting setup, foam pad ~ metal plate ~ thin foam pad, then an Align Velcro strap lightly looped over the sensor to stop it wobbling in aggressive manoeuvres but not so tight as to compress the foam pad.

No sub trims or travel limits have been altered out of DIR mode on the 3G?
What firmware are you running?
Where are your gain pots set to at present?
.