I got a stable flight out of my quadcopter at last.
I played it safe, and took it to the parents’ house seeing as they have a larger garden than I do, and made a few test flights. Only a low level hover, but it was controlled, albeit very roughly. Just goes to show how much practice it is going to take before I can start flying it properly. It wasn’t the most stable of flights I must say, I think amongst other things the propellers and motors all need balancing. It all was going fairly well until I got a bit to cocky and lost control. Only broke a propeller, so not too bad. Since then I’ve also secured the flight controller (an OpenPilot Copter Control) a bit better, which will hopefully keep it level and prevent any major drift and I’m going to make sure the motors are balanced. One recent purchase was a pan/tilt platform so I can put a cheap cam on the front to get a birdseye view of the flight. I’m very tempted to get a full FPV rig too, but I think it’ll be better to walk before I run.
Initial flights were in a + orientation, with one rotor being at the front. I’ve since changed that to an X orientation which means that there are two rotors at the front and the forward direction is in the middle of these. This makes attaching a camera a lot easier, and is the prefered orientation for FPV flying, so might as well get used to it from the start. I could do with some coloured propeller blades so that I can see which way is forward from a distance. Either that, or I may attach some LED strips to the two front arms.
In other news, I’m just building a new hotend for my printer. After the last .5mm one backed up, I tried the .25mm nozzle I got but I think that was a bit too ambitious. After a few hours of tweaking settings, I still couldn’t get a decent reliable print out of it. I’m just waiting for the fire cement to set properly on the new one, and then I just have to solder the wires onto it and mount it. One thing that is being a pain is the thermistor legs are very thin and fragile. I’ve already broken two and they aren’t the cheapest of components. They definitely need to be handled with care and strengthened up.
I also nearly melted another MOSFET buy hooking up the heated bed. Checking afterwards, the bed has a very low resistance (approx 1.5 ohm) which means the MOSFET gets very hot rather quickly. After a bit of digging in the forums, it was suggested that I put a heatsink on it. Nice idea, and easy solution, except the Sanguinololu board that I’m using has very little room to attach one. I’ve got a few different ones to try, and hopefully I can get one fastened on.
So, if the hotend is set by this evening, I may get chance to hook it up and give it a test! I may actually finish this project at some point!