Modifying 3G for better performance

[dale-pabajo]

Originally Posted by rafaelc9436

Thanks JONDABEAR and LEON LUKE for the video and explenation and photos guys, i am really happy with the results more stability,no bubbling, and its basically terned a good flying machine into a greater flying machine , heres a short vid of me flying wright now near my hose in a little spot, sorry for the spanish i basically said its a different machine,feels better, i recommend it to anybody that has 3g, and thanks to my freind SANA for telling me where to buy the silicon.

http://www.youtube.com/watch?v=RjFF4P5kgcA

now that's just graet flying Ralph9436,but admit it you had some help from you'r Dad it flew just graet I will try on my two 3G unit's.
let see if Align tries this on there next units?

[rafaelc9436]

hey Chino estas en todas jijiji your wright buddy if it wasn't for dad i wouldn't have done it, trex 700e 3g coming soon

[npomeroy]

Originally Posted by Corrari

Your making me jelous....I just need to know if it has to be a specific type of silicon.
As i have said, i have roof and gutter silicon galore.

Hi Corrari/Darren Have you modified yours yet? I used Sellys neutral cure roof and gutter silicone, but avoided getting it on the circuit board - just between the three sensors and enough so it stuck to the plastic case. I am leaving the case partly open for a day or 2 to disperse the fumes while it cures.

NelsonP

[Corrari]

Yes, I have, with sellys bathroom silicon. I have infact just come in from a maiden flight with the mod. I have to admit though that I was never a 3d flyer and never had any complaints with the unit anyway. So my first impressions so far are that it is a little 'less twitchy'. I had a wee accident between my trex 250 and my scale hughes which ment the scale body is no longer in use at the mo and my trex 600 back to origional align shell. I have changed all my settings to Leon Lukes from the first post and am going to give it a good run this arvo. But as I was running a 'quieter' set up it will all be new to me. But I am still glad I did the mod as I believe it will allow me to get even more from it than I was expecting.

[Corrari]

Ok, so I have just again been and flown the rex600 and actually gave it some stick (best of my abillity) and yes it has made a difference. I now understand what head bobble is (it is gone) as I have noticed how 'locked in' it feels and super stable. It is such a predictable feel now. I even lowered my expo on the tx 15% and it is so crisp. I have still left my total rudder gain at 40% in the software and 75% on my gear travel.
I am now getting ready to go and fly with a friend at the local park.

When will this thread be a sticky? Its a must!!

[jeffreydc]

I just took my 3G apart and honestly cant understand why this procedure is even necessary. The daughter boards on mine are rock solid and the solder job is very sturdy. They barely budge at all. I did it anyhow just to see if there is a difference. Am I missing something here?

[npomeroy]

Originally Posted by jeffreydc

I just took my 3G apart and honestly cant understand why this procedure is even necessary. The daughter boards on mine are rock solid and the solder job is very sturdy. They barely budge at all. I did it anyhow just to see if there is a difference. Am I missing something here?

Hey Jeffrey - there's a saying in engineering "everything bends" yes: concrete, glass, roads. (I get one of my science classes to measure the bending of the reinforced concrete second floor of our high school and with a suitably levered laser pointer you can show that the floor goes down a micron or two when 20 teenagers stand upstairs!). Even though there is no detectable wobble in the daughter boards, I can quite believe that under certain vibration frequencies they could oscillate a bit. And especially if one sensor moves with respect to another (e.g. like prongs of a tuning fork) who knows what signal may be interpreted by the processor.
NelsonP

[jeffreydc]

Ahhhhh yes....the tuning fork analogy....completely forgot about reading that! That explains it clearly now. Well Im glad I did it and hopefully it will cure the little "quirks" I have had with the 3g. Thanks for explaining that

[Mystic3D]

Originally Posted by jeffreydc

I just took my 3G apart and honestly cant understand why this procedure is even necessary. The daughter boards on mine are rock solid and the solder job is very sturdy. They barely budge at all. I did it anyhow just to see if there is a difference. Am I missing something here?

Fly it.

[jeffreydc]

Gonna try it tomorrow Hopefully its all that and a bag of chips like it's claimed to be. It has been great when its not acting up so if this cures it I will be VERY happy!

[Mystic3D]

I would not categorize it as a "Cure All" but for a vibration free, good flying heli with a few bad habits, it does wonders....

Sensor pad configuration still matters

[Bob O]

Stuck!!!

[malc1]

1st test flight for my modded 700E later on this afternoon.

The heli has had the stop gain reduced down to 55 to get it any where near being OK - been put back up to default 70.

Sensor set up is Align pad/Spartan plate/Spartan thin pad - and has been left as is.

We`ll see what happens.

[mikejr718]

You will like it.

[Leon Luke]

malc1

Try increasing gain and decreasing the stop gain substantially.

[malc1]

Leon

I`ve increased aileron and elevator gain from 70 to 80.

Should I return the stop gain back to 55 then?

Test flight in the morning now - the weathers hopeless here!!

[Leon Luke]

Thats what I would try.

[HiroboFreak]

Originally Posted by malc1

Leon

I`ve increased aileron and elevator gain from 70 to 80.

Should I return the stop gain back to 55 then?

Test flight in the morning now - the weathers hopeless here!!

Why would you have the stop gain that high to begin with?
The default for all stop gains is 0.

[dieter]

Originally Posted by In_to_the_Mystic_2003

I would not categorize it as a "Cure All" but for a vibration free, good flying heli with a few bad habits, it does wonders....

Sensor pad configuration still matters

Sensor pad matters indeed, on my 700E it did, anyway.
Used align tape>quark plate>4010>sensor
Changed tail lock gain to 60 and made a few other small changes in the software according to Leon Lukes settings.

It's absolutely rock solid now.
Tail gain is at 84%, no wagging, holding like a spartan

I couldn't be happier.

(Thanks for the help Mystic..!)

[malc1]

Originally Posted by HiroboFreak

Why would you have the stop gain that high to begin with?
The default for all stop gains is 0.

Sorry got confused I think.


Roll Stop gains on aileron and elevator and on rudder are still as you say default 0.

Rudder lock gain was what had been reduced down to 55 to get the heli to fly OK - this is back to 70 for the test this morning.

Its just the aileron and elevator `Total Gain Compensate` tab that I have increased from 70 to 80.