My roommate and I decided 2 years ago that it would be a fun challenge to learn about and build a quadcopter from scratch. We even planned on making our frame from scratch with 3D printed parts, but eventually settled on a premade one.
This is the parts list we drew up
Turnigy 850kv brushless moters
Cc3d flight controller
20c 6s 5000MaH Lipo
A small ni-cad battery to power Flight Controller
30A ESC x 4
11in props (don't remember pitch)
Simple wire splicing in place of a store bought power distribution board
A fairly cheap reciever/transmitter
(Sorry I don't have brands or exact figures, if these can help with the debug process I'll get back with them when I get home)
We wanted to sort of go big or go home with this build. The end weight would be somewhere in the ballpark of 3.5lbs or so, but the lift generated by each motor/prop combo was calculated to be around 2lbs each, so the lift should be more than enough to maneuver and to maybe lift a moderate payload.
From the get-go we had some problems, our flight controller had a defect on it somewhere where we powered it up and it began to get really hot and eventually shorted out. We replaced the board and the new one we got worked just fine (so we knew we werent overloading it with too high of a voltage or anything).
So we finally get it all assembled, and now comes the calibration side of things. Libre pilot seemed like the best choice since it was the software recommended with the Cc3d board. But after calibration, we had a problem where when the throttle was activated, the motors would spool up to max speed over the course of a few seconds.
We thought we had solved this with a recalibration, but then, after attaching the props, we found that the minimum rpm I could get the motors at was enough to rapidly lift it off of the ground. (Esentially, the lowest possible motor voltage I could get was too high to be an idle speed).
Now we think we're having a problem with (what we think) is a burned out esc, and the idle speed still seems to high when we attach props to the quad.
I guess I was just posting hoping that there was some problem with our combination of parts that was the cause of all of these problems. At its best, it seemed that if we just attached more inefficient props to it, it would idle and attach low enough thrust to not take off. But in its current state, we have 1 broken esc and a number of problems with just trying to get it too respond to controller input.
This is the parts list we drew up
Turnigy 850kv brushless moters
Cc3d flight controller
20c 6s 5000MaH Lipo
A small ni-cad battery to power Flight Controller
30A ESC x 4
11in props (don't remember pitch)
Simple wire splicing in place of a store bought power distribution board
A fairly cheap reciever/transmitter
(Sorry I don't have brands or exact figures, if these can help with the debug process I'll get back with them when I get home)
We wanted to sort of go big or go home with this build. The end weight would be somewhere in the ballpark of 3.5lbs or so, but the lift generated by each motor/prop combo was calculated to be around 2lbs each, so the lift should be more than enough to maneuver and to maybe lift a moderate payload.
From the get-go we had some problems, our flight controller had a defect on it somewhere where we powered it up and it began to get really hot and eventually shorted out. We replaced the board and the new one we got worked just fine (so we knew we werent overloading it with too high of a voltage or anything).
So we finally get it all assembled, and now comes the calibration side of things. Libre pilot seemed like the best choice since it was the software recommended with the Cc3d board. But after calibration, we had a problem where when the throttle was activated, the motors would spool up to max speed over the course of a few seconds.
We thought we had solved this with a recalibration, but then, after attaching the props, we found that the minimum rpm I could get the motors at was enough to rapidly lift it off of the ground. (Esentially, the lowest possible motor voltage I could get was too high to be an idle speed).
Now we think we're having a problem with (what we think) is a burned out esc, and the idle speed still seems to high when we attach props to the quad.
I guess I was just posting hoping that there was some problem with our combination of parts that was the cause of all of these problems. At its best, it seemed that if we just attached more inefficient props to it, it would idle and attach low enough thrust to not take off. But in its current state, we have 1 broken esc and a number of problems with just trying to get it too respond to controller input.
