Posted by Seth Miller on October 7, 2016 at 1:37pm
Quad specs...500g frameExt GPS/comp1000kv motors/30a esc10x4.7 propsArducopter apm2.xMy quad was flying perfectly one day and then a gust of wind flipped it over and crashed from pretty high. I rebuilt it with a new GPS. Put it all back together and now it has this horrible vibration at just above hover throttle. Maybe like 70%. I have balanced the props and the motors all still sing in rythm. I've changed props, swapped out a motor and reflashed the entire thing to start from scratch. And no matter what it still vibrates like crazy. With my soft plastic props I can jump it up into a hover and then it runs super smooth. But anytime you try to gain a little bit of altitude same thing, it wants to shake itself to pieces. Cf props made it a thousand times worse.The video below shows the vibration that happens. I realize this was in an enclosed area and there might be turbulence but it does this no matter where you try. It's always at about 70-75%throttle. I would love some help. Could this be an esc issue? A bent frame arm? Does this vibration look like anything in particular? Keep in mind every prop I've tried has been perfectly balanced.Video::http://s75.photobucket.com/user/seth32680/media/AB0211B5-EA9C-434C-9F40-00B697BB1BDB_zpskig8delp.mp4.html
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Changed the hex prop configuration to use my bigger cf props. Still need to play with auto tune and change the kids. It's kind of twitchy when banking and drifts around a little more than I want in posh old and loiter. This is the first step in having the ability to deliver beverages of ones choice. Next is making it able to drop them through the Tower app.
Old frame arms were the exact same thing as the new one. Plastic arms with cf inner tube molded in. I wonder if during the crash that the cf snapped or bent or something and weakened them. I could obviously have just gotten new ones for 10 bucks and tried that but where's the fun in that! Now I have even more things to break in a crash!
Bravo! Are the arms of the new frame made from CF? As I recall your previous frame looked something like a flamewheel with plastic arms. The flexing associated with plastic arms may have been your nemesis all along (Baseflight flatout won't support flamewheel-type copters.)
Built the hex over the last couple of nights an It works!!! And it's super smooth!!
Must have been something with the frame of my quad. What's nice is this thing has loads of lift. Even with my 6k. Battery it hovers around 45%. I haven't dialed it in but even with just stock tuning it flies great!!!
Thanks for everyone's help, I can't wait to try this thing out at the flying field tomorrow and try some "missions"
So after spending over an hour trying to just get one corner of the quad balanced out I had to give up. New motor/esc/prop/propnut all with same results. I can hold it at the motor mount and it will run smooth so I've possibly narrowed it to a weakened motor mount and ordered a new frame. Since i already had purchased new escs and motors I upgraded it to a hex frame. Because I've obviously lost my friggin' mind. When I could have just ordered new arms for it. It's only money right?!?! I'll have some time to experiment next week so I'll update once it's put together.
Compared to something like Cleanflight or a DJI NAZA, properly setting up a machine running ArduCopter can be a real pain in the ass, and requires methodically covering a laundry list of setup requirements and calibration routines before you should ever attempt a hover (and once you are finally ready to hover, performing an Autotune is just about a 'must' before you can expect it to behave anything like it's dialed-in.)
Bebop? If I were going to buy a ready-to-fly drone running ArduCopter I think I get a Solo. BestBuy is letting them go for only $399 - and that includes the Tx and a 3-axis gimbal but they limited stock and once they're gone - they're gone forever http://www.bestbuy.com/site/3dr-solo-drone-black/5351035.p?skuId=53...
Well looks like I spoke too soon. Flies fine when I'm in control unless I do hard acceleration. But once I hovered a little and hit position hold it did a quick correction for the wind and did the same thing, vibrated a ton on one of the motors, pulled the wires loose and flipped over on its back. No damage except me ego. Really getting frustrated and I have spent enough on this thing to just go buy a parrot bebop. But I'm so wanting to get this thing working because I've invested so much time and energy into it.
It really seems like a balance issue so I'm going to really try to get the motors balanced since the props are all perfectly balanced. Just don't know why this popped up all of a sudden, especially after I've replaced almost everything.
Sounds you're getting closer. If you're getting vibration in the 80+% range in a static test then it's effectively a given something is out of balance.
If you haven't done so already then I strongly recommend you remove the props and balance your new motors one-by-one with a vibration measuring app. A properly balanced motor will be nearly [if not completely] vibration-free throughout the throttle range.
Also be sure to vibration-isolate your flight controller (my personal preference is to use four 5mm squares of Zeal tape.)
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That's the spirit! Glad you finally got it all sorted, Seth.
=)
Bravo! Are the arms of the new frame made from CF? As I recall your previous frame looked something like a flamewheel with plastic arms. The flexing associated with plastic arms may have been your nemesis all along (Baseflight flatout won't support flamewheel-type copters.)
Must have been something with the frame of my quad. What's nice is this thing has loads of lift. Even with my 6k. Battery it hovers around 45%. I haven't dialed it in but even with just stock tuning it flies great!!!
Thanks for everyone's help, I can't wait to try this thing out at the flying field tomorrow and try some "missions"
https://youtu.be/0wUkEe2WNao
Break a leg Seth man =)
Compared to something like Cleanflight or a DJI NAZA, properly setting up a machine running ArduCopter can be a real pain in the ass, and requires methodically covering a laundry list of setup requirements and calibration routines before you should ever attempt a hover (and once you are finally ready to hover, performing an Autotune is just about a 'must' before you can expect it to behave anything like it's dialed-in.)
This a collection of some of the better YouTube tutorials out there on how to correctly setup a multirotor - everything from setting up an APM/Pixhawk to balancing motors and props:
https://www.youtube.com/playlist?list=PLulWRwVa8tsNTtRT6htqNg7aZt3t...
Bebop? If I were going to buy a ready-to-fly drone running ArduCopter I think I get a Solo. BestBuy is letting them go for only $399 - and that includes the Tx and a 3-axis gimbal but they limited stock and once they're gone - they're gone forever
http://www.bestbuy.com/site/3dr-solo-drone-black/5351035.p?skuId=53...
=)
It really seems like a balance issue so I'm going to really try to get the motors balanced since the props are all perfectly balanced. Just don't know why this popped up all of a sudden, especially after I've replaced almost everything.
Sounds you're getting closer. If you're getting vibration in the 80+% range in a static test then it's effectively a given something is out of balance.
If you haven't done so already then I strongly recommend you remove the props and balance your new motors one-by-one with a vibration measuring app. A properly balanced motor will be nearly [if not completely] vibration-free throughout the throttle range.
Also be sure to vibration-isolate your flight controller (my personal preference is to use four 5mm squares of Zeal tape.)
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