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First brushless built motors problem
#16
Ah yh - i thought it could be due to post-2015 regulations that your tx can only do 22ms (!) ...

That's why i for sure will never upgrade firmware on mine... what's annoying me more about spektrum, is them buying raceflight which has big side effects to the open source community, meaning other developers are already holding back their ideas and progress, in fear that others might steal - many of those even looking into other licensing methods than GPL now to protect their code and stuff. Sad Even betaflight's release plans have been scheduled far into the future...

Anyway, hope correct smoothing helps your quad. If that doesn't cure the rough motor sounds, you might still have to optimize soft-mounting. Good luck Smile
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#17
PS: to enable full smoothing on _all_ channels you still have to go into CLI. As i wrote before, "set rc_interp_ch=rpyt", otherwise yaw could still be rough. Probably less noticeable on throttle though.
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#18
Hello, Some updates: 
Changed Orings under fc for smaller and softer ones(silicon)
Lowered Gyro 4khz/pid 4khz(was 8/4)
set rc interplation to manual 22,set rc_interp_ch = RPYT
Lowered motor_pwm_rate to 16000,
set gyro_lowpass = 80 instead 90.
dterm lowpass 90 instead of100.
Rebinded ( SPEK2048 22ms??)Spektrum Sat in cli and noticed that Confusedet spektrum_sat_bind_autorst = 1 (maybe because it is the autobinding Sat from Spektrum??), set to 0 now

Also found a cold solder on motor 3.
Motor 4 was noisier than the others, Racerstars rf2205 motors don't have a u-clip to fix the rotor on stator but a M2 screw with a black alloy washer.They forgot tho put threadlock on 2 of 4 motors  Angry   It is very important to not apply too much torque on these tiny screws because bearings will not spin freely. Poop  

It seems better now but it is still noisy on motors(maybe the stiff Gemfan 5040 props..),tomorrow if not raining i'll try to fly it.
new Blackbox log:
https://www.dropbox.com/s/0s86nawvi6pkuj...3.BFL?dl=0

Thx
[-] The following 1 user Likes lorentz's post:
  • fftunes
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#19
Don't worry, the spektrum_sat_bind_autorst means "auto reset" after binding, so it does not keep to try binding every time you power up. 1 is normal, you don't need to change that. If you set that to 0, it won't automatically get out of bind mode next time you activate it.

And glad to hear it's getting better.

Another thing you could try to make it smoother, is to reduce dterm setpoint weight slider (below the PID table) a bit. Default of 1.9 is very high and can lead to dterm noise (you said it got a bit better when you reduced D, so that also points a bit in that direction).

Will have a look at the log later.
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