Got something really strange with 1 of the 4 plush 10A esc.
I reflashed all 4 with latest firmware. Calibrated all 4 at the same time. Only 1 does not "store" the value..., after a repower, it lost the calibration.
I tried to calibrate it separately, it does the calibration well, all ok, but after a repower, it loses it.
Solution, i had to trim down the throttle by a few trims
1)Full throttle -> 2)lower it -> 3)i get the calibration beeps "ok" -> 4)start the motor and see the effect of the calibration. 5)power off / on and lose the calibration
Now, when i do 1), 2), 3), 3bis) 5 trims lower, ....
It keeps calibration.
I should be on the edge of something...
For the info: the startup without calibration does follow this order! So, calibration with esc without ext osc, is a must! And it works great! Thanks Siimon. And now the programming without reflash...
Try to lower the P factor and see how it behaves.
In hovering its a nice "sound", when you move the copter, you hear clearly the "chirping low tone, grrrr, grrrr", which is NOT good! It should always be a sweet "phwee, pfweee" sound.
I am experiencing same kind of behavior on one of my kk-copter with lot of vibration due to not well balanced props and these motors (1200kv i think).
I set P as high as possible, in hover it looks rock stable, then, when start flying, i get constant "chirping low tone" like motors can't follow and lose sync for a short moment.
The esc takes all the unfiltered pwm commands.
So i should first get rid of the vibration, and see if i gets better.
Second, use a better "vibration tolerant" firmware..., or the esc firmware can do a part of the job...
Last edited by alll; Jan 19, 2012 at 09:38 AM.
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