quadcopter build, first attempt fail

N

nechaus

100 kW
Joined
Oct 11, 2011
Messages
1,876
Location
Brisbane > AUSTRALIA
Specs
Tiny 1600kv motors + 12 amp esc that came with the x230 Kit from hk
Multiwii 328p...
1300mah battery for testing

First attempt - total crap
https://www.youtube.com/watch?v=H_epjO_QWCQ



Second Attempt.. lowered P in the PID settings for pitch and roll- Turned on LPF in arduino multiwii code
https://www.youtube.com/watch?v=eIX9Y-2x7Hc


Still crap..

3rd flight was outside....
Blew a esc upon landing sideways and did not disarm fast enough, blades still spinning... the quad so blew an esc..

Checked all motors... seems like x2 out of the 4 motors sounded like something was grinding...

if your looking for a super cheap quad... dont buy the x230 from hk
...

Now ordered x4 1450kv motors... bigger motors bigger props..
also ordered x4 1600kv motors.

Have built a $2 quadcopter frame out of MDF About twice the size of the ones in the video... Weighs very similar. +/- 200 grams or so
Will post more videos in the next few days once i receive the new motors..
Found that enabling the LPF filers in the code helped greatly with stability comparing first video and second video...

Goal is to build a super cheap super simple floating FPV platform for making videos
Took vidoes of crap motors.. sent it to hk, they gave me a full refund.. seemed like some phases were sorting out... by wiggling the phases and noticing its behaviour change drastically...



You guys should post some pics of your diy setups
 
I noticed when i flew it outside, instead of hovering like a foot off the ground.. going up to a meter or so high, motors were spinning faster and seemed like it was more stable again before i crashed.. maybe the wind reflection from the ground was also having an effect.
 
This is the new stuff im waiting on to test again


x4 1600kv brushless motors http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=23769 $8.73 each
x4 1450kv brushless motors http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=36563 $8.65 each
x4 20 amp esc's http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=25046
props http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=30660
http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=30657

this one will be a bit of a thrash and bash unit.. Once i have built this.. I will build something bigger..
50 amp escs bigger motors... 1meter wing span...
long range transmitter low frequency
hi gain antennas
gps return to home as fail safe...
ect
 
this is the frame i built.. some of your might laugh :lol:

I squared it out.. cut it with a wood saw.. painted it.. No sanding required... took maybe 10 minutes :lol:

Ill see if she holds up or even works
... i will be buying a new frame soon.. needed something now that's bigger than that x230 frame... ...
 

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I have a 900mhz 200mw fpv setup.. camera, tx and rx...
once i can attain a stable flight ill be attaching it on right away and using my tv to give it a crack
I made a long 15 meter AV cable to go out side up to the fpv rx...


once its all done, I should be able to sit in my lounge room, get comfortable on the couch, fly fpv on my 55inch tv

with the stock transmitter i should be able to at least fly around my property...
video should be good for 500-1000meters with the 200 mw and omni directional antennas
Tested and was able to walk to the end of the second street at ground level so that was close to 300-400 meters so i would hope that i get 500 meters range in the air for now..

I have the RX setup about 4 meters hi
 
snapped the frame yesterday at the park... Used paddle pop sticks with CA ... she is as good as new :lol:

I was pretty happy with my self, Saw some guy at the park as well flying his quadcopter.. he paid $700 and mine was keeping up with his.. mine only cost $140 .. and had a longer hover time.. his weighs 1.5kg and mines 899 grams... his battery was 2.8ah mine was 2.2
booyaaa

thats as it is now in those videos... I have ordered a full Nylon frame.. 450mm size.. http://hobbyking.com/hobbyking/store/__55840__Q450_V3_Glass_Fiber_Quadcopter_Frame_450mm_Integrated_PCB_Version_AU_Warehouse_.html

I wanted to know how hard it would be to add in induction charger to the base of my new frame..
I would like to sit inside fly my quad fpv and land to charge....
was thinking it will most likely be slow charging as i dont want to be that much copper

iv been using the ecalc.ch alot to try and improve things..
 
it's been flying quite well for what it is so far.. taken it upto maybe 200 meters and did not need to do that muck correction to keep it in one spot
have 3 of the same props and one different one.. still surprisingly stable and works..

Overall i am happy with these multiwii boards...
I get a real frame tomorrow and new props

here are some videos of it running so far

[youtube]lqkLE56nZYw[/youtube]

[youtube]e2zzVa0ohaw[/youtube]

still needs alot of work to take any kind of decent aerial videos
 
Cool project.

How much did that catfood weigh by the way?
 
So... I have been playing with my new toy quite a bit...

I was pretty happy so far.. Can easily hover in one spot...
Can do verticals quite quickly ect.. I like it.. i like the power it has... I feel i could use more tho..
However the motors run very warm.. one is very hot...
The one that is hot will surely start burning the windings.. I can see the motors windings might be getting a bit darker.. you wouldn't be able to keep your finger on it..

Now I feel I have to replace the motor and get bigger motors..I hate the idea of this thing dropping out of the sky..


Went ahead and ordered x4 motors that are about double the weight to use on this frame..
1100kv.. did some calculations and went with the 10 inch props vs the current 8 inch.


At the end of all this.. I want a spot on reliable quadcopter that will carry the APM board and do gps mission... lift a couple of kg
Also plenty of strength in the frame to do acro flight..

Think I will do a hexa or octo for the better flight controller... been really happy with this multiwii board so far tho..



Yesterday i was climbing the quad to about 100-150 meters could just see it... Cutting the throttle and letting it free fall.. @ about 15 meters id smash the throttle and it would just make it.. really thrashing this thing :lol:
 
just been doing some more backyard flights..


I can definitely notice the bad motors coils getting darker.. she is flying so well still... but can tell it would be wasting power..
I just did a 2 minute wot bash around.. and 3 motors were just luke-warm if that... the other one was crazy hot.. I think its just a matter of minutes before it fails..
Wish i purchased 5 of these motors so i had a backup....
But think ill keep the 3 good motors and buy another 3 more of the same kind to chuck on a hexa frame..

I do have another 4 motors sitting there.. they are the same physcial size.. just extra 150kv.. So think ill swap em and see how it runs...
Id rather have all 4 motors running at the same temp ..

Keen as pie to try the ones i just ordered.. the 1100 kv and double the size..
 
i just gotta ask. how do you guys get to keep the electric water heater outside? does everybody do it there? and you guys get to have 240V wiring for light circuits in the house too?
 
Respect! Could you fly it into that cell phone tower for us? I just want to see what happens... :lol:
 
Well I just soldered like 12 bullet connectors on 1600kv motors..
seem to be a bit more zippy than the 1450kv motors.. but hardly noticeable...
the 1450 kv motor are turnigy's... brass/yellow/gold colour.. 28xx series
the 1600kv motors are the blue ones from hk. 27xx.... home brand from hk
both had the 8''-45 props..

All the motors are warming up now.. However.. I still have that motor in the same position that's heating up considerably more
So im guessing it wasnt even that motor that's dodgy.. the frame must be slightly off causing that motor to work harder to stabilize it.
...


Something hk did was send me x4 motors... one seems to be slightly taller than the rest.. not sure if its the same motor or what.. still very stable and less heat from that one sooo.. perhaps i should swap that bigger one to the side that heats up the most...


if you guys are going to build one.. id recommend using slightly larger motors on that frame... 1400kv on 8 inch props.. 1100kv with 10 inch props.. even 1000kv with 10 inch props would probably be better..
i reckon motors rated for about 300-450 watts and using 3s seems like it would be a good combination..

I have been looking for a good combination of fast speeds-stable-efficient-good payload capacity-20-30 min flight time.
 
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