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HelicopterFlybarless Rotor Head SystemsAlign 3G › align 3gx not holding on aileron
12-03-2011 04:45 PM  5 years agoPost 21
coolingfan

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Grand Junction,​Colorado

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update: Did test flight. Problem remains. Loss of stability on aileron at higher head speeds. Anyone flying trex 500 with 3gx? What gains are you using on aileron and elevator. I am at 40%. Anything higher and it won't hold at all. Does anyone know what the warranty period is for the Align 3GX? Well guess I will try the servo I order. It will be here Tuesday. Well I really thought it was going to work this time.

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12-04-2011 02:30 AM  5 years agoPost 22
coolingfan

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Grand Junction,​Colorado

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Well I have finally come to the conclusion that there is definitely a problem with the 3GX controller. Everything is good and locked in as long has head speed does not exceed 2400. I tried using some gyro tape for a futaba 401 and I couldn't even get off the ground. so I put the stock tape back on. Guess I will just have to settle for 2400 for now.

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12-04-2011 03:33 PM  5 years agoPost 23
coolingfan

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Grand Junction,​Colorado

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Well we finally have joy. I finally have it figure out. I went into the software and max out the aileron gain and then max the aileron pot on the 3GX and then did a test flite. It is holding now. Full power climb outs,perfectly level. I believe what I might do now is move the ball on the servo horn one hole out. At full gain I should get oscillation. I don't thinks I have enough resolution and that is why I have to max the gain to get it to hold. Finally. It strange how only a week ago it was holing at about 80% gain. The air temp really must be a factor. That is the only thing that has changed.

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12-04-2011 04:24 PM  5 years agoPost 24
ncarbon

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Kalispell Montana

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Glad

Glad you figured things out. I have also struggled a little with the gain, what people reported, what Leon luke recommended and what works for me, I an at E55 and A59 and I really enjoy how the 3GX flies.

Ned

It is............what it isn't!

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12-05-2011 05:33 AM  5 years agoPost 25
Stephen Born

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USA

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Good thing you found a defective DS510 before it just stopped working altogether while inverted. Could have been worse.

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12-05-2011 02:07 PM  5 years agoPost 26
coolingfan

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Grand Junction,​Colorado

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Well I thought I figured it out, just yesterday it started rolling right again as soon as I increase power to blades. What gyro tape is everyone using. I have the stock align tape that comes with gyro. Also If I max the gain in the software and pots I cannot get the heli to oscillate at all. According to the instruction it says to turn up the gain until it oscillate and then back it off until it stops. I can't get oscillate no matter how hi I go on the gain. My servo balls are at 13mm. This is according to the trex 500 manual. This thing is so unpredictable one time it will hold and then the vary next flite with out changing anything it will not hold. I don't know what to think anymore. I have just about had it. I wish I had another one I could try to see if there is something wrong with it. Like I said just a week or more now it was flying perfect and the gains were between 70 and 80% and everything was good. I just want to fly. But I am afraid to start wringing it out and have it roll right during some maneuver. If you know what I mean.

Brad

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12-05-2011 02:14 PM  5 years agoPost 27
Stephen Born

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USA

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With the FBL systems, there is so much working to keep it stable. Every input during the set-up process has to be on the dot.

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12-10-2011 11:43 PM  5 years agoPost 28
coolingfan

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Grand Junction,​Colorado

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Well I went to fly today. Just when I was about to lift off the rotor disk start to move uncontrollably, so I drop collective immediately. I ended up touch the tail blades on the ground. This caused damaged to my 2 front torque tube gears. When I approached the heli to inspect damage I could hear something running. At first I thought it was the main motor spooling down. Then I realize it was coming from the 3GX. So I took it inside and sure enough the 3gx is making a noise. It sounds like a scracthy spiinning sound. Like something is loose inside the unit. I am glad I had not got airborn before this thing decided to fail all the way. Now if I can just get align to stand behind it. I have only had it for about 3 months. Shouldn't they last longer then that? If not I won't be buying another one. That's alot of money to spend. May I should take a look at the beastx. I have heard good things about it.

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12-10-2011 11:54 PM  5 years agoPost 29
Stephen Born

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USA

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You were very fortunate that it did not leave the ground. In a situation like that, the last thing I would have worried about was the heli. Dangerous situation.

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02-19-2012 08:03 PM  5 years agoPost 30
jasonrusso

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Haverhill,​Massachusetts

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Did you ever figure this out? I bought a used unit on here a couple months ago and I can't get it fly well. I have another Trex 600n with the EXACT same setup, and it flies great. Same servos, receiver, battery, regulator, blades, etc. The only thing different is the engine. I even copied over the settings from the working unit.

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02-20-2012 01:48 PM  5 years agoPost 31
coolingfan

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Grand Junction,​Colorado

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I ending up sending it in to AssurranceRC. They are one of the warranty contacts for Align. They put it in a trex 500 and said that they couldn't find anything wrong with it. But they went ahead a replace the pcb in it just to be safe.

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02-25-2012 02:48 PM  5 years agoPost 32
Zaneman007

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Texas - USA

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Dude, the oscillation is probably due to a bad unit. I had it oscillating on all three axis. And it was like you said turn up the head speed and wham.

They said that they replaced the main board in mine, but we will see. Due to the weather, I have not had a chance to fly it.

If you haven't already, I'd call assurance RC.

Old Guys Rule!

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12-29-2013 05:17 AM  3 years agoPost 33
ppmd

rrNovice

GILBERT

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Same problem as you in Trex 450 Pro DFC

I have the exact same problem as you, Coolingfan. I know this is an old thread, but on idle up 1 I will experience a strong LEFT pull. I am running 3GX v3.1, and have perfect mechanical setup. It hovers rock solid and I can make very precise turns and moves in normal mode. As soon as I hit idle up 1 (throttle at 85% flat), the heli becomes scary. It pulls to the left in a very erratic fashion. Like you, I have tried adjusting aileron gains, reflashed the firmware, re-setup the 3GX with my DX8 multiple times, checked my servos, and made sure my trim settings are OFF in my DX8 radio in all flight modes. Like you, my problem was irratic. One flight it would be fine, but the next would be scary.

I think you have narrowed it down to your 3GX. I think it's time to change out mine. I assembled this 450 Pro DFC kit in April 2013. In 8 months it seems to have failed. Very disappointing.

My other 3 GXs on the 700E FBL, 500 Pro DFC, 450 Pro, and 450L Dominator work flawlessly.

I enjoyed reading your posts. Just wanted you to know you affirmed that I was not crazy.

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01-04-2014 10:28 PM  3 years agoPost 34
ppmd

rrNovice

GILBERT

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Fixed the problem - it was the 3GX

I was able to borrow a 3GX from the local hobby shop and install it in my 450 Pro DFC. Ran the same settings on idle up 1 and 2 in my DX8 transmitter. Problem solved! Heli now rock steady (almost like a 500). I can now fly with confidence at higher head speed.

I was able to get an RMA from AssuranceRC (the U.S. Align distributor) for my defective 3GX, so hopefully the new/replacement 3GX will work perfectly.

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01-06-2014 04:21 AM  3 years agoPost 35
coolingfan

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Grand Junction,​Colorado

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I am glad I could help. Just a little update on that. I did however send it in for warranty repair. They installed it on a Trex 500 and could not duplicate the problem. But went a head and replaced the board in it anyway. After I got it back from them. I turn around and sold it to a fellow modeler. And far as I know it work fine for him. I been thinking about getting another one to try on my Raptor 50 that I converted from a flybar to flybarless, I am currently flying it with the futaba CGY 750 which is working fine. I am sure they have improved the 3gx by now.

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01-13-2014 05:53 AM  3 years agoPost 36
ppmd

rrNovice

GILBERT

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Latest update:

Installed the 3GX that had its PCB (Printed Circuit Board, or the electronics inside the small 3GX box) replaced under warranty by AssuranceRC. I put the 3GX back on the same heli that had the problem. Bound it. Re-did the setup routine (DIR mode, rudder, throttle, etc.). Problem solved. Super stable on idle 1 (85% flat throttle) and idle 2 (100% flat throttle). Confidence restored.

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