Hey guys, 

I´m working on a f450 build, and there is a problem I can figure out the cause.

- When I arm the motors and give throttle (any throttle, can be 5%, 30% or 100%) motors will spin always at full throttle, not respecting the % of the actual throttle given.



Steps taken:
- Radio calibration done, I can see throttle working just fine.
- ESC Calibration done also, in fact it´s weird because when I finish the calibration reducing the throttle to ZERO, then the motors work as expected, but if I unplug the battery and plug it back, then the same weird behavior is seen.

Here is a video:


Any idea ?

Thanks

I'm not sure if you have a problem or not - it's often not useful to arm a quad and apply throttle without there being propellers fitted.

What I will say is: put some insulation on those bullet connectors before you short circuit your ESCs!!!

(28-May-2017, 06:24 PM)unseen Wrote: I'm not sure if you have a problem or not - it's often not useful to arm a quad and apply throttle without there being propellers fitted.

What I will say is: put some insulation on those bullet connectors before you short circuit your ESCs!!!

Hi Unseen, 

Well, I think there is a problem, because like I said, after finishing the ESC calibration they work as expected, but if I remove battery and plug it back, then I see this behavior, something is not right.

Regarding the ESC connectors, I know is a risk, I´m taking care to ensure they don´t touch each other to burn the set. Before covering it I want to make sure it´s working and they are spinning on the right direction.

Thanks

Additional information from the flightlog to demonstrate what is happening.

RCIN CH3 -> My throttle coming from the TX (PINK)
RCOU 1, 2, 3, 4 -> ESCs (BLUE, GREEN, RED, ORANGE)

On this log I gave throttle 5 times, the first 4, were really low %, like 5%, (1100 on the graph).
But motors are STILL going a t about 50%, not linearly is something like (ON/OFF) not proportional.
At the end I give full throttle, and again, motors spin at about 50%, not respecting the command again.
So regardless how much throttle I give, it will do the same.

This APM board is driving me mad 

It almost looks as if you have the ESCs in 3D mode.

Hi Unseen, yes, it almost look like 3D ESC setting, but is not the case (unfortunatelly), motors are not reverting the spin direction when you go beyond half throttle, in fact is just ignoring.

What is happening is something like if I was using a SWITCH (ON/OFF) to control the motors, it's very weird, flashed firmware probably 50K times, it's unclear if this is a SW or HW failure.

Very strange ..

If you could upload the log, we can check how you have things set up...

What's the value of the parameter RC3_Trim?

Hi Unseen,

Here is the flight log:
https://www.dropbox.com/s/povjo0j7m7au45...g.bin?dl=0

I don't have Mission Planner on this computer, I can check this parameter when I get back home in few hours, but I checked an older log I have in TXT format and the value is:
PARM, RC3_TRIM, 1090

Thanks

(02-Jun-2017, 05:41 PM)flabombarda Wrote: Hi Unseen,

Here is the flight log:
https://www.dropbox.com/s/povjo0j7m7au45...g.bin?dl=0

I don't have Mission Planner on this computer, I can check this parameter when I get back home in few hours, but I checked an older log I have in TXT format and the value is:
PARM, RC3_TRIM, 1090

Thanks

For your throttle, I'm pretty sure that parameter needs to be set to 1500...