Author Topic: Hinkenborp's Mavic Clone Build Diary - 07/2020 onward  (Read 1568 times)

Offline jchilders_99

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Re: Hinkenborp's Mavic Clone Build Diary - 07/2020 onward
« Reply #15 on: August 28, 2020, 04:21:38 AM »
I'm excited to see your progress!  And thanks for the links; I'll look through them tonight.

The research hasn't been as painful as I was expecting.  It was a bit challenging to run down all of the acronyms, but it's really not that complicated.  I did order a stack and will have to re-work the internals but I'm not too worried about it; there should be more than enough space either horizontally or vertically stacked. 

That seems like a smart choice on a local store for the LiPo.  I'll probably do the same :)

Offline Hinkenborp

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Re: Hinkenborp's Mavic Clone Build Diary - 07/2020 onward
« Reply #16 on: September 06, 2020, 03:34:17 PM »
Bit of an update for ya, no photos this time around though.
learned a bit more about the ESC & PDB. With a 4in1 ESC, you don't need a PDB, the ESC board acts as your new PDB.
Whereas w/ the 4 individual ESC's, you need a PDB to connect them to. That being said, I ended up rolling forward w/ the 4in1 ESC here-
https://www.amazon.com/AKK-Brushless-BLHeli_S-Electronic-Controller/dp/B079G5VN68

For my specific motors, I couldn't find a prop adapter that worked well. I made a new design that works well that is based off of these ones designed by snir2001-
https://www.thingiverse.com/thing:3374429

I'll be posting a remix of his design to thingiverse soon so that can be downloaded and I'll link that here. Works with m2 screws and the stock mavic props after taking them out from the middle quickadapter.

My motors use a very odd 17AWG wiring for the 3 wires coming off of each one, so I ended up rolling with some 16AWG automotive wire. Haven't gotten everything hooked up yet to test, but things are going smooth once more.

I also found that the 4-prongs on the Sonar hook up perfectly with an extra 4-wire 3D printer extruder cable I had, so that's my new solution for wiring up those freestanding prongs on the Sonar easily. Wishing I had purchased some bullet connectors to hook my motors to the 4in1 ESC, would make assembly easier!

Also, look into a 'smokestopper', like this here- https://www.google.com/search?q=how+to+make+a+smoke+stopper&rlz=1C5CHFA_enUS877US877&oq=how+to+make+a+sm&aqs=chrome.0.69i59l2j69i57j0l5.1624j0j7&sourceid=chrome&ie=UTF-8#kpvalbx=_NPJUX47kNPKMtgWz6rqYDA26
I went ahead and made one that uses a set of XT-60 connectors and an automotive microfuse to protect my components when testing everything. I have a multimeter, but can't really afford to sink extra money into this at the moment if I miss a shorted component/wire while getting setup.

More to come soon, I'll try to get some good photos of my wiring setup etc.

Offline Hinkenborp

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Re: Hinkenborp's Mavic Clone Build Diary - 07/2020 onward
« Reply #17 on: September 06, 2020, 03:51:14 PM »
Here's that thingiverse link for my remix of snir2001's prop adapters for the 2212 Racerstar motors-
https://www.thingiverse.com/thing:4589676

Offline Hinkenborp

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Re: Hinkenborp's Mavic Clone Build Diary - 07/2020 onward
« Reply #18 on: September 14, 2020, 05:33:12 PM »
A couple recent developments-
I got my controller programmed with betaflight watching this video-

He does his setup in cleanflight, but pretty much everything lines up the same in betaflight.

I also broke the back end of the lower body by overtightening my motor screws (ended up cracking from the screw holes) as shown below.

My suggestion to fix and prevent this would be to use some washers on your m3 screws for the arms on the inside. Should prevent all the stress from an overtightened screw from transferring to such a small area of the body. As such I had to reprint the lower body. I widened the holes for wires from the back motors/arms to make a bit more clearance for them to pass through, as well as removed the screw mounts at the front of the design as I didn't have a use for them in my build. I can share the stl for that updated lower body if needed. Furthermore, I broke the tabs off of the rear top plate of the build while trying to force it down over my battery (wires were not optimized well so everything got mashed down) and am reprinting that now.

And a weird quirk I found about the motors, if you test the leads of each against each other for continuity, they are all connected (albeit not on the esc, just the wires leading to the motor), so I went back through and made all of those match to that spec. Thought it was weird, but they won't spin up otherwise. The connection between all three leads is inside the motors, so as long as you have continuity through each wire you're good. I also switched to bullet connectors with small housing. Makes for easy fixes if a motor goes out, and no more tight soldering inside the body of the quad.

Last but certainly not least was I tore a pad off of my 4in1 ESC on accident, and in trying to lay solder down to replace it, shorted the connection to the main power. Turned it on and pop, need a new esc board. So that's in the mail, arriving Wednesday.

If everything goes well with the new ESC, should have the quad in the air this upcoming weekend for the maiden flight.
It won't have functioning sonar, GPS, or LED's yet, but at this point I just want to get it in the air before confronting those issues as well. This whole project has ended up being very complex and I don't think I was well prepared for that revelation, lol.

Offline jchilders_99

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Re: Hinkenborp's Mavic Clone Build Diary - 07/2020 onward
« Reply #19 on: September 14, 2020, 08:15:55 PM »
Holy smokes (literally)!  I'm going to have to update the lower body for mine as well; the FC/ESC stack I bought aren't going to fit well so I'll be making new mounting options for them.  I'm planning on using heatset inserts for all the bolts, but I'm not happy with how those bottom legs are mounted.  I'd like to see the design you ended up with. 

I'm also super excited to see yours in the air!  Keep with it and post some videos for us!