why is my quad wobbling around?

mejha

mejha

Member
Hi all. I'm new to this hobby and would love to hear your advice.

I have a DJI F330 frame, with A2212 13t 1000kv motors, running with KK 2.1.5. FCB, 8045 props and those ESC's.
While quadcopter is in the air it just doesn't fly right. It feels like someone else is moving yaw and roll. It's just moving in random directions.

I did acc calibration (calibrated it on level surface), trimmed it, balanced my props, battery is properly fixed. And this is all what I know what could be the case.

Could it be that ESC's are having too much amperage? Vibrations??
I want to hear your suggestions before i spend money on new components.
 
GJH105775

GJH105775

Off and on
Moderator
if only in Self-leveling mode then:

• P Gain – The power of the self-levelling. Higher number is stronger. Too high will cause oscillations. To low and it’s slow to self level. Higher number gives the operator more stick control. Lower number reduces the operator stick control.

• P limit – Limits the max power of self levelling. Higher number is higher limit.
 
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GJH105775

GJH105775

Off and on
Moderator
mejha said:
This could be the problem. I already ordered USBASP cable to update my FCB. Current FW is 1.9S1.
Click to expand...


You want to re update it to 1.8S1 the 1.9 is for quads with sensor problems. Can you upload a short video of the problem? I still think it is a problem with Pgain, but the video should tell.

Try it with self-level on, and then with it off.
 
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DIY Drone

DIY Drone

Active Member
Is this a drone you bought out of the box or did you build it. If you built it I can tell you what "could" be the problem. I did a design not too long ago, I used a paint pen and labeled the esc 1,2,3,4 along with the motors 1,2,3,4 that I planed to use. I did this before going to bed that night. The next morning I went to wire up my design. Since I build in a two part design, I put it all together based off the paint pen. "What I did not do is what I should of done". This was being lazy on my part. Since it was all together I "assumed" that the esc the with paint on it went to Motor 1 with the marked paint and then plugged it into the FC board as Motor 1. After about an hour of trying to maiden it. Played with the PI, reset the board, anything I could think of. I took it apart into two separate pieces. I then "traced" each wire from the ESC to the FC board, and found I had Motor 1 hooked into the ESC 2. Even though the CW and CCW were the correct spin on the motors, the ESC were not directing the motor I that the wires were hooked into on the Flight control board. That little drone I built did flips two inches off the ground before I discovered this.
Well after correctly assembling everything and tracing the wires, I made sure the Motor 1, spun CW was traced to ESC 1 and plugged into the FC as Motor 1. I went to maiden it and in the video on my site you will see the same maiden flight of this same quad after I fixed it.
It was not the props, nor was it the direction of the motors in their layout, It was that I had Motor 1 driven by ESC 2 and hook into Motor 2 on the flight control board. I learned a lot that day.
Now this is only if you built your quad. If you bought it as a RTF then all of this is useless to you.
 
mejha

mejha

Member
GJH105775 said:
You want to re update it to 1.8S1 the 1.9 is for quads with sensor problems. Can you upload a short video of the problem? I still think it is a problem with Pgain, but the video should tell.

Try it with self-level on, and then with it off.
Click to expand...

I did not know that. Thank you.
Here is the video.
I only tried it with selflevel off. I will try to update my FCB as soon as i get USBASP.

Jackson said:
@ mehja

You want to get Stevis V1.19S1 Pro



http://www.rcgroups.com/forums/showatt.php?attachmentid=7345655&d=1417731690
Click to expand...

I will try that update to. Thank you.


DIY Drone said:
Is this a drone you bought out of the box or did you build it. If you built it I can tell you what "could" be the problem. I did a design not too long ago, I used a paint pen and labeled the esc 1,2,3,4 along with the motors 1,2,3,4 that I planed to use. I did this before going to bed that night. The next morning I went to wire up my design. Since I build in a two part design, I put it all together based off the paint pen. "What I did not do is what I should of done". This was being lazy on my part. Since it was all together I "assumed" that the esc the with paint on it went to Motor 1 with the marked paint and then plugged it into the FC board as Motor 1. After about an hour of trying to maiden it. Played with the PI, reset the board, anything I could think of. I took it apart into two separate pieces. I then "traced" each wire from the ESC to the FC board, and found I had Motor 1 hooked into the ESC 2. Even though the CW and CCW were the correct spin on the motors, the ESC were not directing the motor I that the wires were hooked into on the Flight control board. That little drone I built did flips two inches off the ground before I discovered this.
Well after correctly assembling everything and tracing the wires, I made sure the Motor 1, spun CW was traced to ESC 1 and plugged into the FC as Motor 1. I went to maiden it and in the video on my site you will see the same maiden flight of this same quad after I fixed it.
It was not the props, nor was it the direction of the motors in their layout, It was that I had Motor 1 driven by ESC 2 and hook into Motor 2 on the flight control board. I learned a lot that day.
Now this is only if you built your quad. If you bought it as a RTF then all of this is useless to you.
Click to expand...

I built it myself.
I checked that, it's not the problem. But thank you for your advice ;).
 
Herpderpwerp

Herpderpwerp

Well-Known Member
Have you try to balance the prop? I had similar issues once, the problem is one of the prop is unbalanced, when i balance the prop, the wobbling goes away
 
Jackson

Jackson

USA member at large
You'll note it behaves better when you get higher in the air, getting out of the prop wash. The 3rd attempt looked pretty good. You really can't expect it to sit there hovering in place with just throttle, ain't gonna happen. FWIW why are you testing on concrete? No grass?
 
mejha

mejha

Member
Herpderpwerp said:
Have you try to balance the prop? I had similar issues once, the problem is one of the prop is unbalanced, when i balance the prop, the wobbling goes away
Click to expand...

Props are balanced. I will order new ones, it might be the material.

Jackson said:
You'll note it behaves better when you get higher in the air, getting out of the prop wash. The 3rd attempt looked pretty good. You really can't expect it to sit there hovering in place with just throttle, ain't gonna happen. FWIW why are you testing on concrete? No grass?
Click to expand...

Even if i go higher it wobbles like that.
I would like to fix that, before i mount camera on. I have lawn, but there are flowers everywhere so i didn't want to damage them.
 
GJH105775

GJH105775

Off and on
Moderator
mejha said:
Props are balanced. I will order new ones, it might be the material.



Even if i go higher it wobbles like that.
I would like to fix that, before i mount camera on. I have lawn, but there are flowers everywhere so i didn't want to damage them.
Click to expand...
If you are using ABS props thaat are even a bit larger then they flex causing terrible vibrations
 
Herpderpwerp

Herpderpwerp

Well-Known Member
Try to fly it from your hand, apply throttle, but dont let the quad go just yet.
Be careful with the prop tho. Feel which way the quad want to go, and if you hold it in your hand, you can feel which motor is vibrating more than the others.
I used this method when i try to tune the pid settings on my quad.
Hold the quad from the bottom frame so your arm wouldn't get in the prop way
 
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