Author Topic: Questions about a new build  (Read 3251 times)

Offline eqpirate

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Questions about a new build
« on: April 09, 2018, 01:37:21 AM »
Hello everyone! I have been looking to print a drone for a year or more now and have stumbled upon this website many times when doing some research. I recently just bought a prusa i3 MK 3 which got here last week. I think I am ready now to start a build! I have all of the files downloaded from the dji naza build. I am wondering, is there a complete guide anywhere on this site from start to finish for a complete noob to print and build this? I have been looking for the past few hours but cannot find one. If there isnt then I will probably get started and ask people for help and finish a drone then make a complete guide for any other beginners to follow.

Thanks for the help guys!

-Jake

Offline eqpirate

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Re: Questions about a new build
« Reply #1 on: April 10, 2018, 07:18:12 PM »
Well no such a guide so far. Not even a response! So I will start a complete guide I guess. Let me first say I know nothing about drones, absolutely nothing! I own a small 50 dollar one I got from a Frys Electronics which is so hard to fly and not worth it, but was just enough to create an interest in making a larger one! So I have been doing some research about motors. This is my first step. I am going to start printing out the parts from the files on this website but I need to start making my build of materials (BOM) to start purchasing those. I have been seeing so many different terms and abbreviations which I cant make heads or tails of. I found a decent introductory guide to making a drone here:

http://dronenodes.com/how-to-build-a-drone/

I learned a little bit more about the size of the motors and ECS's and what not. I still feel rather clueless to be honest. Steve's guide uses motors with the ECS built in to it. I liked that idea as it looks nice and clean. However doing a little research someone posted that should you crash really hard you can mess up your motor and have to replace both the ECS and motor in one versus just having to replace the motor. This made me think that as a beginner it would probably be best to separate the two. That also gives me more options for motors as the combo motors are relatively rare from what I have been seeing. I will do a little bit of digging around today on the forums here to see what size most people are using on theirs. Also, does anyone have any recommendations that if I am going to use separate motors and ECS's should I get a board with all four of them together or have them wired out? Is there space in the body for the board? I think I saw someone who made a build on the forums with the board, but also I saw someone who made the arms with spots for their ECS's at the cost of some structural integrity.

Any suggestions are welcome! Thanks everyone!

Offline eqpirate

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Re: Questions about a new build
« Reply #2 on: April 10, 2018, 08:54:12 PM »
Still trying to decide on a motor, specifically what size I would need. I am thinking for this first drone I would like something that I can use for FPV but also for a little cinematography if I wanted to. I came across this website:

https://www.flyingtech.co.uk/blog/efficiency-vs-performance-how-build-drone-long-flight-time

Which leads to me to believe for more cinematography (carrying a payload of a camera) it is better to go with a lower KV motor to have more torque. As far as wanting more speed for the FPV one would want a higher KV motor to zip around.

Does this logic sound right? Any thoughts from people with more experience than myself?

Offline Tushar Bali

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Re: Questions about a new build
« Reply #3 on: April 11, 2018, 03:50:15 PM »
yes i believe in the same logic plus that gets us more flight time,i am planning on using original dji motors with original foldable props.

Offline eqpirate

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Re: Questions about a new build
« Reply #4 on: April 11, 2018, 04:16:36 PM »
I see! I went back to that last article that I posted and saw that someone made a moderate sized drone with a flight time of over two hours! I think for this first drone I am leaning more towards FPV than cinematography so I am leaning towards a higher KV motor with smaller props. I should get that posted on here today! Thanks for the input Tushar! Do you have all the parts ready for your build?

Offline eqpirate

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Re: Questions about a new build
« Reply #5 on: April 11, 2018, 06:30:29 PM »
Okay folks. Found some good motors and ESCs!

https://smile.amazon.com/gp/product/B01N0RLD67/ref=ox_sc_act_title_1?smid=A36AZVMIXMN0IJ&psc=1

https://smile.amazon.com/gp/product/B01M9GOQC5/ref=ox_sc_act_title_2?smid=A36AZVMIXMN0IJ&psc=1

These should be pretty fast and good for some FPV work.

Next I'm looking at my flight controller... I was thinking of just going with the dji naza M v2, but that doesnt allow me any sonars from what I have been reading. While it would be great for regular flying, good altitude hold and handling, something tells me having the sonars on the front and rear of the craft would be useful. Any thoughts? Should I just give up on the sensors and go for the naza FC or something a little more customizable? Also any input on the choice of motor and ESCs?

Thanks guys!

-Jake

Offline eqpirate

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Re: Questions about a new build
« Reply #6 on: April 12, 2018, 03:57:07 AM »
Found some cheap mavic props on amazon!

https://www.amazon.com/DJI-CP-PT-000578-Release-Folding-Propellers/dp/B01N7RYLIH/ref=sr_1_3?ie=UTF8&qid=1523500853&sr=8-3&keywords=mavic+props&dpID=41CXsYk3NGL&preST=_SY300_QL70_&dpSrc=srch

What is everyone else using? I think Steve got some mavic props but he said he needed an adapter? Anyone know?

Offline Tushar Bali

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Re: Questions about a new build
« Reply #7 on: April 12, 2018, 04:02:48 PM »
yes the adapter is there, but for some specific motors just search richard gardner on youtube.i am making my mavic as close as to real deal so same props and motors.Print is ready electronics are on the way.btw the space is so limited so always keep mind of dimensions of fc and esc plus if u plan to get gimbal like me.

Offline Tushar Bali

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Re: Questions about a new build
« Reply #8 on: April 12, 2018, 04:04:19 PM »
plus not sure about 2 hrs flight time how is possible,plz provide me the link for the exact same.

Offline eqpirate

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Re: Questions about a new build
« Reply #9 on: April 13, 2018, 04:35:55 AM »
https://www.flyingtech.co.uk/blog/efficiency-vs-performance-how-build-drone-long-flight-time

That is the link with the video. Honestly, as long as you get a perfect set of hardware with all the different parts calculated correctly I can easily see the physics of getting two hours. That being said, this would not be possible on a mavic clone. That drone that did two
hours had 28 inch diameter props with a 1.2 meter frame which gives it more room for a bigger 6s battery and more torque and less KV so more battery life! Pretty interesting stuff!

Back to these props... Where is the adapter at that you said "is there"?

Offline Tushar Bali

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Offline eqpirate

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Re: Questions about a new build
« Reply #11 on: April 16, 2018, 04:44:40 AM »
Cool, thanks for the link! I am starting to print out the parts for my drone now! Soon I will have to start buying some of the parts! I still would love to hear does anyone use the ultrasonic sensors on their drone? Does it help, is it worth it?

-Jake

Offline eqpirate

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Re: Questions about a new build
« Reply #12 on: April 19, 2018, 04:25:29 AM »
Most of my parts are just about printed! Just posting a little update! This weekend I will have a ton of time to finish up my build list and begin ordering my parts!


Offline nelr

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Re: Questions about a new build
« Reply #13 on: April 22, 2018, 06:57:45 PM »
Hi Eqpirate.  If you are going to use the Mavic props, I would suggest buying the real thing. The cheap Chinese clones are not stiff enough and causes all kinds of problems. Second, buy some lower Kv motors. The suggested motors are 2208, 1200 Kv ZTW Black Widows. They've got a built-in esc. Unfortunately you will be lucky to find those anywhere. I've settled on clone versions of the DJI 2208, 980 Kv motors. These are as close to what the real Mavic uses as I could get. You won't find the exact Mavic motors. Those can only be bought as part of the leg assembly. I had to buy extra esc's. One for each motor. I would however suggest you try and get a 4-in-1 electronic speed controller, due to the limited space in the body. As far as the flight controller goes, I like the SP Racing F3 version, but there are F4 versions of FC's available now. Something like the Omnibus F4 looks really great. I has a slightly faster processor and quite a bit more memory. It should also come with a 4-in-1 esc on a separate board. Or at least, that's what I read. So far I haven't been able to work on my Mavic clone much due to a lot of time spent in hospital, having an 8 month old baby and limited funds. I have diabetes which screwed up my kidneys and now spend 12 hours a weeks on dialysis.  >:(. On Youtube there is a guy called Painless 360. What I couldn't figure out from reading through this forum, I figured out with that Youtube channel's help. There is a guide for the Naza and F3 FC's as well as a drone building for beginners series. Reading through the forum will give you most of the info, but it is a lot to read and the info come in snippets few and far between. So basically you have to read almost everything. The best place to start is Cardskull / Steve's original post here http://diyrc.co.uk/3d-printed-mavic-clone/mavic-clone-stl-files-version-3-0-f3/ or the Naza version here http://diyrc.co.uk/3d-printed-mavic-clone/please-note-the-stl-files-are-in-the-download-section-you-need-to-be-a-member/

Good luck. I'll try and answer more of your questions, but be warned, I am just as much a noob as you are. I have been reading this forum for more than a year though.

Offline nelr

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Re: Questions about a new build
« Reply #14 on: April 22, 2018, 07:00:22 PM »
One last thing, if you buy high Kv motors you have to use smaller props than the Mavic one otherwise your motors will overheat. High Kv motors don't have enough torque to swing such large props. Lower Kv and larger props will give you better flight times.