Hmm ok so you have had 2 units give the same error. May i ask what helicopter are the units on? Did the two error throwing gyros come off the same helicopter? And what is the frequency of the 10 - 20% vibration error - high frequency?

The only reason i ask is that some times gyro vibration errors can be accumulative - ie you can have a slight high frequency vibe on a tail - the unit will still function but the tail will slowly turn one direction. The cyclic will still work as well but it will feel spongy - not sharp and hard.

I think its accurate when i say that vibrations have driven every single heli pilot crazy on more than one occasion. But its the number one cause of gyro issues. Depending on the response of the monitoring software high frequency vibrations don't always display their true value accurately. I know you have discounted this but it sounds very vibration-ish

Now the other thing that comes to mind is a short to the frame somewhere possibly affecting the quality of the supply to the gyro - excessive electrical noise on the supply lines. This can also affect gyros adversely.

What sort of helicopter and what size is it? Are you using descent gyro tape? A process of elimination might be whats required

 

Hi, all the vibes were below 5000rpm. So in the head area. Admittantly I don't balance blades on my small helis as they normally get used as a mobile sim. I might start though. I'm pretty particular with blade tracking though and set up. I chucked in a new feathering spindle just in case.

The Heli is a new Trex 470LM. Only a dozen flights 90% of them tuning the ikon, no crashes yet on this heli. While I was waiting on the replacement for the first unit I put on another new Ikon2 HD version I had waiting to put on my Goblin 630, once I'm sure ikon2 rescue is good. With the HD version the heli had absolutrly no issues with the rescue, I would have done at least 20, all flawless. I'm just using the supplied gyro tape from Ikon.

Once the new unit arrived I put it on the 470 in place of the HD version. First 2 flights good then the error appeared and continued to log even without spooling up it will log more and more sensor errors and give the 12 swash pumps. Thats why I'm kind of blaming a bad production run. I have another ikon2 on a goblin 380, again new built with low flights <8, but no issues yet.

So I'm kind of guessing the HD version working on the same heli between the 2 non HD is the control, I've read a few different views on mounting tape but I've left it up to ikon2 to supply adequate tape. I'm willing to try another if needed. One gyro had grey tape the second one looked clear and was stickier. Not sure if Ikon have changed tapes.

I would describe the cyclic action as sharp and the tail locked in. I would say this Ikon flies as good as my demon 3sx and is easier to tune. I'm sitting the gyro on the small Align carbon gyro plate that wedges in the frame above the tailbox. I have thought about rem,oving this plate and putting it straight on the plastic tail box. Not sure if this is a bad idea on a belt drive heli.

So I guess while I haven't covered every base, I think I've done enough where a unit without a fault will function well. I'm pretty sure the Demon would rescue on this heli. I have heard some other reports (lets call them rumours because I don't want to reveil the source) about a few recent units being sent back also. I was advised on hfreak to tap the case with a screw driver to jolt the sensor back into range.

Obviously I'm open to doing a bit more fault finding but I don't want to spend hours If the issue is not at my end. I'm going to be time poor for a while for some silly reason after at least 5 years flying I'm going to change from flying mode 1 to mode 2. Heli won't be uncrashed for much longer I dare say. Lucky I have AccuRc2, coffee and beer.

I really hoping a unit from a different batch solves the issue as I want to roll out more Ikon's due to features, software and flight characteristic being awesome.