AnakA System

[anaka]

Hi multiurotor people, I'm developing my personal solution for aerial vedo shooting, I'm working on it by 3 years and now I can consider the results good enough so I want to share with you my job.

I'm going to post some pictures of the latest build and hope that it will be interesting and inspiring for you all, in these days I'm completing the main structure of the frame so expect updates soon.

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yes I know, it looks similar to other systems but there are not so much alternatives, my goal is to obtain the lightest and stronges tructure possible, I made my central frame versatile, it can work with different size of arms for motors, so in case of heavy or light lift I can change components in a short time, it is also fast to unmount and pack in a standar bag for transport

during the CNC work I lost the stability of the CF plate and one central frame was a bit damaged but nothing drastic..it can fly anyway :black_eyed:

for the vibration absorption I made a custom setup based on silicon cubes, I also made my own cubes, they are very light

 

[ovdt]

Looks good. When working with long aluminium arms I realized that they are very easy to vibrate and flex. In my setups, I couldn't able to use longer then 35cms. Then I reverted back to 16mm round alu arms which was very stiff with 40cm lenght.

What's the lenght of your arms?

 

[anaka]

Hi ovdt
my arms at the moment are 50cm but i made a system that let's motors be positioned at the desired lenght
this way i can change propellers lenght without to make new holes, like in a cinestar or Droidworx setup
i know that squared arms transmit more vibs but with a good absorption system they disappear, this way the research is less expensive and I feel more confortable becouse I avoid to spend time to perfectly orient each motor when i go to shift them

 

[anaka]

today I assembled the new camera plate, this is my custom version of AV130, here you can see how I changed drasctically the original setup into a direct drive way, I made my custom camera mount plate, made it more customizable, I got inspiration from cinestar gimbal, now I can center and balance my GH2 much better than before

i made a landing gear setup, one more time cinestar inspired me, I think this is the lightest way possible

you can also notice motor mounts that comes from the FlexaCopter guys, after to buy them I developed my personal solution to make them work on a square tube and behave as clamps

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some issues:

as you can see the servos can give a bad impression, I locked them with PVC lock-stripes, I can garant to you all that they are like that by more than one year and never failed, i made this to revert all back to original setup whenever I want

the quality of CNC drilling was not so high so I had to manually clean some parts with dremel and lost the tipical cleanness of CNC, nothing drastic, just could be better looking, in a near future will work to make all a bit more neat

 

[anaka]

some steps forward, i made 3 different sets of dampers to understand wich one is the best

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at the moment the system is ready and fully operational
the total weight with a 6000 mAh lipo and GH2 with 14-42 optic is 4.30 Kg
the flight time, with 8 mph wind average, is 8 minutes

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[anaka]

more steps forward..

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as you can see I changed the dampers, now I made a different system that reduces the distance of the gimbal from FC of 3 cm and absorbs more vibrations than before

I moved the lipo behind the gimbal going to have perfect balanced weights

now I lock the gimbal to the multirotor frame with velcro straps, as you can see I'm implementing velcro widely, this way I reduce weight compared to screws and, in the parts where I'm using them, they give the same locking strength

one more interesting feature of velcro straps is that you can quickly correct how tight they are, so in case of some vibrations still pass through the dampers you can go to relax a bit them

 

[DucktileMedia]

Dude, that took 3 years to make that? Have you been locked in a cave away from the internet? I was expecting to see some sort of new folding arms or damper idea. What's wrong with the stock av130 tray?

Where can I get those zip ties from?

 

[anaka]

Hi Iris, obviously in 3 years I built different frames and gimbals, I also experimented a lot of harware before to reach this state and i found this forum some moths ago only

I suppose you mean the velcro straps for zip ties, if yes they are from RS electronics, you can order from there

abouth the AV130 tray, if you have it you can see that you can't operate fine adjustments on the camera position, so your weights will never be perfectly balanced, in the way I changed I can tune both the lateral and depth position of the camera going to reach perfect balance

one more reason for this change is that now I use very fast direct drive servos in the place of the stock ones, they are the ones from big helicopters tail rotor, when they are not powered they move much more free than the common servos so give me enough feedback to find the baricentric point

basicly is very close to what DJI and photohigher are goin to introduce on the market now, with new heavy direct drive motors, I did it more than one year ago with much less weight, less voltage, less cost

 

[skivvie]

basicly is very close to what DJI and photohigher are goin to introduce on the market now, with new heavy direct drive motors, I did it more than one year ago with much less weight, less voltage, less cost

Do you have video to prove that statement? If you can come close to direct drive motors with that setup I'd love to see it.

 

[anaka]

it's on the way, have to tune up a couple of things more on MKTools

 

[jrlederer]

Just a word of advice: based on the 'revolutionary' designs posted above, I would speak cautiously when challenging such lminaries in the field as Kimberly. I know, I know...mind my own business. I just don't want to see this turn into a laughing matter, that's all. I would repeat the words of the wise man whose post is a few before mine who said, "show us proof of this mount coming even close in performance to any of PH's products!!".

Sorry if my advice is not wanted, just couldn't resist temptation here...that's a bold statement!!
--jonathan

 

[anaka]

hi jonathan, just to be clear, is not my intention to start a polemic

if eveyone reads well my words I wrote that "basicly is very close" that means that is not exactly the same

and I dont challenge anyone, I made no personal names, just company names and I'm not a company, I don't sell anything, I buy and improve

 

[jrlederer]

No offense taken, I was just saying...

 

[anaka]

no problem Jonathan, just give me the time to show my stuf and then everyone is free to judge

 

[anaka]

Do you have video to prove that statement? If you can come close to direct drive motors with that setup I'd love to see it.

i'm not going close to direct drive motors, I really changed the mechanics of AV130 into a direct drive

 

[anaka]

now you can see my direct drive system, the results are pretty stable

 

[anaka]

some 3D views

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this is the actual configuration, after to design each element I assembled them in a procedural way so is very easy to try different leghts, positions of components or holes for screws and so on with just some clicks...going to optimize as much as possible materials and weights

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this was the previos configuration, with carbon fiber tubes and clamps, heavier than the actual, I reduced the weights of 600g recovering more than 1 minute of flight time

probably my next frame will be again a carbon fiber tubes approach

 

[jes1111]

Hi Augusto,

Which Hitec servos are you using?

Jeremy

 

[anaka]

Hi Jeremy

the servo model is the HS-7985MG, is not the fastest produced by Hitech but does it's job very well

 

[anaka]

latest shooting in Hyde Park

I think I need new motors, the ones I have start to emit bad rumors (and bad vibs), maybee the ballbearings are going to expire

is there anybody that knows if the replacement ones for MK3638 can fit also the MK3538?!?
it's very bad to trow away motors that still are good except for the ballbearings