Planning first quad build [must get right the first time]

It's going to serve as my flight controller. Anyway, it's been months of ordering and research. I've hit a new problem, how do I "equalize" the strength of the motors? I'm using Afro ESC 30A btw on I2C set at 0x25, 0x29, 0x2a, 0x2b. I tried pulsing the motors, it comes up with some props spinning longer than others. Why does that happen? I send the same speed to all motors. I've been reading about ESC calibration, but it seems like it's only for setting the max and min of PWM. I don't think this is what I need.
 
TheSentinel said:
It's going to serve as my flight controller. Anyway, it's been months of ordering and research. I've hit a new problem, how do I "equalize" the strength of the motors? I'm using Afro ESC 30A btw on I2C set at 0x25, 0x29, 0x2a, 0x2b. I tried pulsing the motors, it comes up with some props spinning longer than others. Why does that happen? I send the same speed to all motors. I've been reading about ESC calibration, but it seems like it's only for setting the max and min of PWM. I don't think this is what I need.
Click to expand...
Well, you are going to need something to interface between the Pi (Micro-processor, not micro-controller, it is just a SBC) and the ESCs. Your stabilizer needs to be really low level as it makes corrections so often that any latency will make it wobble.
 
TheSentinel said:
It's going to serve as my flight controller. Anyway, it's been months of ordering and research. I've hit a new problem, how do I "equalize" the strength of the motors? I'm using Afro ESC 30A btw on I2C set at 0x25, 0x29, 0x2a, 0x2b. I tried pulsing the motors, it comes up with some props spinning longer than others. Why does that happen? I send the same speed to all motors. I've been reading about ESC calibration, but it seems like it's only for setting the max and min of PWM. I don't think this is what I need.
Click to expand...

In a perfect world with simple physics this would work, but it is REALLY complex, a flight controller makes hundreds of changes a second using PIDs (sometimes without the derivative). So you will need dedicated stabilization, I suggest you get a simple flight controller to interface with, but it is possible to do it without, though I have seen many people give up after months of work because they can't find an algorithm to work or get an algorithm to work.

You really need a cheap flight controller just to test your hardware before you start trying to work the software around it.
 
Back
Top