FBL Gyro 3GX and burnt servos

[Clifford Poddar]

I wanted to ask anyone if this was a common occurrence, or point me to a possible reason why I burnt out 2 of my servos while setting up the 3gx on my Trex 450. I haven't played with any of my helicopters in some time, and decided to set one up again to fly. I have Hitec HS-5065MG for the ccpm. My 3gx was on version 2, and I updated it to v5. All the servos were working great for the past few days while working on the helicopter. But when I decided to setup the 3GX two of them burnt out. I was in the dir menu when it happened.
I should mention that I've had these servos for some time and they've been working great even before I went flybarless about 1-2 years ago, so i know they were working great. They were also working great for the past few days before I upgraded to v5, when I took the helicopter out to see if it was still calibrate correctly. I only hovered the heli.

I did plug in the 3gx to my computer to ensure it the settings were on digital and 1520, and it was fine.

Any ideas? Thanks for your time and help!

 

[holtneil]

Hi mate were the servos buzzing before they burnt out it sound like they were over driving in the DIR mode , it is possible that the servo travel was to high when you went to re-set up , if I ever go to do this I reset transmitter setting for the heli before I start on the Gyro

 

[Clifford Poddar]

I completely reset my tx before doing this because I ended creating a new preset for the heli.. All travel distances are at 100% (and not 125%).. Unless you set the travel distances in the 3gx for cyclic servos as well as the tail (I blew two cyclic ones). Or unless I have to tune down the travel distances below 100% with the 3gx.

Btw, is it possible to use a 720 pules tail servo with 1520 cyclic servos?

Thanks again

 

[Tony]

Yup, you can. Just set the tail to 720 in the rudder setup menu.

And I would leave all travels at 100%. Reduce the throw in the swash mix menu on your Tx.