AutoQuad Forum

Wow, just made some test today, the bad behavior has been agravated a bit, the quad is accelerating by itselft in manual mode, sometimes with yaw movement, scary. I tried to change PID params, but nothing seems to affect...

¿What this can be? It's the first time I've seen anything like this.

Crap, my fault!
Yep they are soft, maybe ACC_Z isn't happy?

Hi aBug,
sorry for the late response, after a lot of testing I could mitigate the vibrations effects lowering I and D values, but the effect was definitively there, with more weight it was more noticeable and slight changes of CoG also affects the issue. I'm giving up with this frame/FC combination, it's not worth it the soft orange bobbins are a problem for Autoquad. This was my first build when I started FPVing, it was collecting dust... I tried to recycle it, but it seems like a bad combo. With other FCs the frame works very well, I wonder what is the difference here.

This is the GNSS antenna I'm using http://www.tallysman.com/wp-content/upl ... _Rev21.pdf
I had two from another project hanging around, it should be better to use a GLONASS compatible one with wider bw +1600Mhz. Since I'm not receiving any other signals than GLONASS ( the lower bands ) and GPS. I'm using a 100mm diameter round pcb as a ground plane, cutted with scissors. I removed the magnet and soldered the can shielding of the antenna to the PCB ground plane.
I just followed the minimum required ground plane size for not detune antenna too much, the manufacturer of this antenna recommends 1/2 wavelenght.
I never tested MAXTENA helical GPS/GLONASS antennas, but they don't require ground plane like patch antennas, it's interesting area to dig about.