Author Topic: Mavic build with DJI parts  (Read 865 times)

Offline cady

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Mavic build with DJI parts
« on: December 17, 2018, 10:08:07 AM »
Just started my build but went a different way and have to modify the parts.

I started to print in PLA to test the parts and check what i need to modify. For the first prototype should be fine

In the end i think i will print in PETG or carbon fiber PETG.

So i found on aliexpress the arm with motor, I might buy 4 and give it a spit
( https://www.aliexpress.com/item/Not-Brand-New-DJI-mavic-pro-arm-Front-Left-Front-Right-Back-Left-Back-Right-arm/32845097417.html?spm=2114.search0604.3.124.328e74773bRYZ0&af=d99%253A&aff_platform=aaf&cpt=1545038722264&sk=bpx0eTsc&aff_trace_key=750e1f9ef8d1424d9b99d40f3337cdab-1545038722264-06408-bpx0eTsc&cn=32845097417&dp=5.12.207.54-fcoKnr0mLrQ&terminal_id=e0cbb847f50e41e69f77e53ec83d949f )

I also want to use the Mavic ghimbal it seems is around 100$ with their controller.
https://www.aliexpress.com/item/Original-Replacement-Repair-Parts-DJI-Mavic-Pro-Gimbal-Camera-Lens-FPV-HD-4K-for-DJI-Mavic/32923130640.html?spm=2114.search0604.3.19.1f3938529C65Dc&af=d99%253A&aff_platform=aaf&cpt=1545039411899&sk=b8ScDOje&aff_trace_key=61abeacb7a25420aa519ec9b98b8b7d5-1545039411899-05610-b8ScDOje&cn=32923130640&dp=5.12.207.54-fcoKnr0mLrQ&terminal_id=e0cbb847f50e41e69f77e53ec83d949f

Does anyone used them?

I might have to change the mavic brushless controller with a storm 32

Does anyone know if their controller works without their boards?


I'm not sure about FC now, fell free to make suggestions.

Offline Kananga

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Re: Mavic build with DJI parts
« Reply #1 on: December 17, 2018, 01:07:18 PM »
You're in for a rough ride I'm afraid.
You should be able to interface to the dji motors in theory but ive yet to see someone do a write up on it but the arms won't fit the clone, in theory you should be able to interface to the gimbal but I've been trying to get one recently with little success with seller responce. You will not interface to the dji board very easily if at all.
You can actually buy a mavic in parts quite cheaply if you intend to use your own electronics but due to the (lack of) stuff you can fit into the original shell your mavic will never be as good as the original, this clone bridges that gap but don't expect dji performance. Using dji bits might make it look slightly more dji like but don't fool yourself into thinking your going to have dji performance by using their bits.

I'm afraid to say you buy a mavic and use dji parts or you build this clone and use the intended printed and off the shelf parts, the 2 don't mix well together but I'm happy to be prooved wrong and look forward to reading your journey especially with the gimbal.
Unfortunately I've messaged around 6 sellers now claiming to sell the gimbals but non have replied if they include the motors so I've not tried that route yet.

Offline cady

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Re: Mavic build with DJI parts
« Reply #2 on: December 17, 2018, 02:37:32 PM »
Well I always like a good challenge.

The motors should be fine they have 3 wires, any esc should be able to control them easily.
The arms can be fit on the clone with a little Fusion (or any cad program on the body)

The gimbal have the motors if you look on all the pictures you can see the connector and the motor axle.
Gimbals axis are attached by motor axles, so they are there.
So the motors are there, so i'm pretty sure I can use any brushless gimbal controller to move them.

On aliexpress it seems to be multiple options.
One is only the gimbal (aluminium pars with motors) (you will need ribbon cable, camera cable, camera and some plastic covers)
Second is the gimbal with camera, wires and covers
Third is the gimbal with camera, wires, some kind of controller and cover.

I don't want to make a clone with dji parts to have the same performance.

Instead I want to have some fun. And use some good and easy to fit pars.
I really like how small the gimbal and camera are.

Offline Kananga

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Re: Mavic build with DJI parts
« Reply #3 on: December 17, 2018, 03:46:26 PM »
Well you seem well prepared, I look forward to your progress.

I've seen a few different gimbal combos as you say but I'm just after the gimbal with motors for a runcam split. I like to double check with these Chinese sellers exactally what's included but non have replied.

I'm fully with you on the wiring up thing except the dji gimbal I believe also has sensor wires but i assumed just leaving them off would work.
I'm wondering what the kv of the gimbal motors are but I've not as yet found any specs.

Offline Kananga

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Re: Mavic build with DJI parts
« Reply #4 on: December 29, 2018, 02:56:18 PM »
Did you get the arms and gimbal yet?

Offline Tushar Bali

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Re: Mavic build with DJI parts
« Reply #5 on: January 16, 2019, 06:13:37 AM »
i am on the same rough ride as u mate.

Offline Kananga

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Re: Mavic build with DJI parts
« Reply #6 on: January 16, 2019, 06:50:08 AM »
i am on the same rough ride as u mate.

How's yours coming on, I seem to remember you had your electronics on the way then you were pid tuning I think so I guess you're flying? did you get the gimbal and have you interfaced to it ok?

Offline Tushar Bali

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Re: Mavic build with DJI parts
« Reply #7 on: January 16, 2019, 09:03:44 AM »
Since we are using mavic legs we have to redesign the frame to accomadate them.(also u have to buy a separate part for folding-unfolding front legs,the back legs comes with that part built in.)

I am not pro with fusion,but still trying to learn it as much as possible.
For testing purpose i originally used hot glue and cutted the structure according to need,but that just added unnecessary wate to the back,which resulted in aggresive response to forward motion(idk why but evertime i tried to fly it,it just wanted to go forward instead of upward),i tried it to tune it with PIDS but still not satisfied.

The conclusion i got is that we need to redesign the frame. :'(
Plus if you place gps and vtx togther they wont work,there will be interference.Thus gps must be placed on upper front and vtx on the lower back of mavic(below mavic) :-\
For now i am learning fusion to redesign the frame,but the damn exams keep delaying the process.
Whats your status mate?

Offline Kananga

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Re: Mavic build with DJI parts
« Reply #8 on: January 16, 2019, 11:19:17 AM »
I've changed the base for my needs but need to print a 3rd and hopefully the last version of it before I can start soldering.
I'm pretty much on the home stretch now, I more or less know what I'm doing I just need to find time to do it.

I'm undecided on whether to try and play with a original gimbal or make my own. Did you get a gimbal in the end?

Offline Tushar Bali

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Re: Mavic build with DJI parts
« Reply #9 on: January 16, 2019, 03:27:55 PM »
If u plan to use camera(i am using runcam split 2)they will come with a stiff wired connection to their circuit board,which makes moving the camera with servos a bit difficult.
Nevertheless i decided to go on without gimbal until i achieve mavic like stability.(in future i may add gimbal by cnc the motors to make em small)
Also can u please share the 3D files. :D

Offline Kananga

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Re: Mavic build with DJI parts
« Reply #10 on: January 16, 2019, 05:22:24 PM »
I'm using the split 2 as well but would not suggest using servos, you need proper gimbal motors, I just assumed you would be using the dji gimbal, my bad.

Offline Tushar Bali

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Re: Mavic build with DJI parts
« Reply #11 on: January 16, 2019, 05:33:31 PM »
Cady have you started on the project??