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3d - Printworx

Printing 3d Forum

22mm PVC pipe quad

Started by teslahed, Sunday,June 24, 2012, 19:42:51

Previous topic - Next topic

teslahed

I've got my FPV gear set up and working for it's first quick test flight;





I've got the screen positioned so that i can fly either using the FPV equipment or by line or sight as normal until I'm used to it. It's probably best like this with the short range radio gear I've got at the moment anyway.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

That looks good cant wait for the test flight / video  ~~

teslahed

The first test flight was a little disappointing - mostly i think because i still haven't got the autolevel mode working very convincingly on my multiwii flashed free flight board. Ideally i want a quadcopter that sits perfectly still and level until given a prod by the controls - it's quite hard trying to stop an unstabalised quadcopter from moving off to one side on a tiny screen, much easier when controlling by line of sight. I guess there is a reason you don't see people like warthox flying with FPV gear. 

Still, it worked and all i broke was a prop and a cable tie.

In the long run i think i will use multiwii for stunt flying and stick a different flight controller in my fpv quadcopter.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

I think for people that fly line of site and have done for some time Fpv is going to be a whole new learning curve and not very easy, some of the people that start with Fpv are probably finding it easy as they dont have the habits we have  ;)

teslahed

Monday,July 23, 2012, 19:01:00 #34 Last Edit: Monday,July 23, 2012, 19:26:37 by teslahed
Well I've made myself a new 22mm PVC pipe quadcopter. I've made this one the same size as my flyduino aluminium frame in terms of motor seperation so it should be interesting to see how differently the two end up performing once I've got the new one properly tuned. The PVC quadcopter seems to be about 150 grams heavier than the aluminium one (604 grams without a battery at the moment) but should withstand the odd crash better without the arms bending.

It's got RCtimer A2208-17 1100KV Outrunner Brushless Motors and 20amp speed controllers and 8 inch props.

I'm using a Kcopter flight controller with an MPU-6050 sensor board i bought a while back but haven't had the chance to test yet. It seems to fly well enough but i haven't tuned it yet. In theory the Kcopter flight controller should perform quite well - it's a 32 bit MultiWii based board with no build in sensors so you can choose your own - but they drilled the mounting holes slightly squiffy in the corners so i can't recommend it.



One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

Looks good I was wondering when you would get around to using the 32 bit board  ~~
can you tell a difference between the normal 8 bit and the 32 bit running the same firmware ?
I read comments on another forum that he thought it was all bull and that the 32 bit wouldn't be any better. I think there should be a difference but have never tested it, I have read comments from people who say flashed esc's dont feel any better but in this case I know that they do, or they do for me and a lot of others that have tried it  ~~

teslahed

Until i get the board tuned i won't really be able to compare it with the 8 bit MultiWii boards i've flown and even when it is tuned it will be difficult to get a direct comparison as i have different boards and sensors combinations in different quadcopters.

The best test would be to buy the 8 bit Kcopter board and compare that with the 32 bit version with the same sensor board in each.

Having said that i very much doubt i will notice any difference between the two.

I think the main advantage of 32 bit at the moment is in terms of the amount of memory available for the programmers to use. You'll know if you've tried activating too much stuff in 8 bit MultiWii you run out of memory on the arduino - this wont happen on the 32 bit boards.

I've heard it said that the extra processing power wont result in better performance now as there are latencies associated with the motors and propellers themselves which are the limiting factor - it just means that the boards wont slow down too much in the future as more features are added.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

I thought the 8 bit kcopter board had the atmega328 chip the same as the pro mini fitted to the paris v3, so the paris v3 fitted with a mpu6050 should be the same as the kcopter fitted with the same, I thought you had a mpu6050 fitted to your paris  ;)

teslahed

Tuesday,July 24, 2012, 11:25:01 #38 Last Edit: Tuesday,July 24, 2012, 11:52:45 by teslahed
QuoteI thought the 8 bit kcopter board had the atmega328 chip the same as the pro mini fitted to the paris v3, so the paris v3 fitted with a mpu6050 should be the same as the kcopter fitted with the same, I thought you had a mpu6050 fitted to your paris


That is true actually. The only reasons i think I'd need one of the Kcopter 8 bit boards for a direct comparison is that i suspect the PARIS flight controllers are manufactured to a higher quality judging by the look of them. Also my PARIS board has the magnetometer and barometer as well as the gyros and accelerometers in it. When i switched out the plain acc/gyro version of the MPU-6050 for the '10 degree of freedom' version i noticed the cycle time go up a bit on the PARIS but I'm not sure how much difference that makes. I do only have one '10 degree of freedom' sensor as they cost quite a bit more which is a shame so i can't compare directly at the moment.

If / when i finally get GPS off the ground with MultiWii i may have to pinch the '10 degree of freedom' model from my PARIS board and stick it in whatever i use GPS with. It seems like a good way of getting a compass and barometer in a small space along with everything else. In my current stunt quadcopter it's a bit wasted as the compass does no good at  all and all i use the barometer for is when i want to take my hands of the controller for a minute or two to scratch an itch or something. 
One circlip short of a quadcopter.
 1 lobe short of an antenna.

teslahed

Well my Kcopter flight controller decided to stop responding to my USB serial adapter. It still works in the quadcopter as it should but i can't get it to respond to the PC software to change PID settings or flash the firmware. I've bunged the PARIS board in my new quadcopter for the time being until i get the Kcopter sorted (assuming it's fixable).
One circlip short of a quadcopter.
 1 lobe short of an antenna.

MadMax

oh sorry to hear your having problems is it the same as the ftdi used for multi wii ?

teslahed

Yeah it uses the same serial RX/TX Gnd/Volts serial connections as an arduino uses. I've checked my FTDI with my arduino and that definitely still works so it's just the Kcopter board that decided to stop responding for some reason...
One circlip short of a quadcopter.
 1 lobe short of an antenna.

teslahed

Just a quick video of me practicing flipping at low altitude with my pvc quadcopter;



I was able to borrow a friends digital video camera to get the video in full HD at quite a nice quality.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

Your getting very good at that and nice and low too, It will deff be in a field when I have another go because as you said I don't think I would have dumb thumbed it had I had more room  :bravo:

teslahed

There's one flip where i over-correct a couple of times coming out of it and mutter something under my breath if you watch closely.

One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

Was it something like ooops almost did a gaza  :rofl:

MadMax

Very funny  :rofl: I will be thinking that now every time I plant one  :rolleyes:

Quote from: Gaza07 on Tuesday,August 14, 2012, 17:13:28
Was it something like ooops almost did a gaza  :rofl:

Gaza07


MadMax


Gaza07

[attachimg=1]

teslahed



Another video taken from the pvc quadcopter.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

Very nice flight Chris the wedding flight  :bravo:

teslahed

Quote from: Gaza07 on Monday,August 20, 2012, 14:24:28 Very nice flight Chris the wedding flight  :bravo:


Thanks - yeah the original plan was for me to try and get some aerial shots of the outside bit of the wedding itself, but it was really windy and there wasn't all that much space so i decided to play it safe.

I didn't want to go down in history as the first person to take out a crowd of people with a quadcopter - would have made the papers though :evil

I got it up for a quick blast later in the day - there was a big field next to the hotel which is what i used. The field was perfectly setup for quads too, though in this case it was quadbikes as they had a bike course laid out.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

I wondered what all the bright coloured objects were for  ;)

MadMax

Nice video every one looks dressed up except you  :confused: they all looked suitably impressed, I bet the video didnt come out to well on the guys phone, I bet he couldnt keep up  ::)  ~~

johnrs

where did you get your FPV kit from ?
New to Quads but loving it

My YouTube Channel

Techie-Review

teslahed

I didn't - it's all line of sight flying with a mini-spycam i got from ebay (model 808 #16) taking the video.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

teslahed

Tuesday,September 25, 2012, 00:36:26 #57 Last Edit: Tuesday,September 25, 2012, 00:44:08 by teslahed


I decided to glue motor mounts on the end of my old PVC quadcopter to extend the arms for added stability and rebuild it with some spare ESCs and motors.

I'll test fly it tomorrow when the epoxy is set.

It should be fairly stable - it's got the Paris flight controller and an MPU6050 in it for now.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

teslahed

Tuesday,September 25, 2012, 14:14:47 #58 Last Edit: Tuesday,September 25, 2012, 21:03:05 by teslahed
It flies;





If it stops raining i may even get to test it outside later.
One circlip short of a quadcopter.
 1 lobe short of an antenna.