Problems with my Naza Wobblecopter

BerndM

BerndM

Member
Hey Hover
Your video is a perfect example of what happens to a CMOS video sensor when it is affected by HIGH frequency vibration. They will all do that as long as that vibration is not eliminated, either by some serious balancing efforts on your props or motors or failing that, some good isolation material to absorb these HF vibes.
 


H

hover

Member

Attachments

  • P1020243.jpg
    P1020243.jpg
    76.7 KB · Views: 275

H

hover

Member
I just did some more Motor Tests, and I think the last one sounds not right. This is the only one I didnt changed till yet:
 
Last edited by a moderator:

H

haris_g

people can fly
dear hover I tend to agree with BerndM, your video wobble is due to cmos sensor getting HF vibrations, might help to balance your props and isolate your camera (maybe also try to mount it on an other place on the copter plate as some edges express more vibration than others) and check again

btw check this video to witness some serious copter wobble due to wrong settings
http://www.youtube.com/watch?v=ITJhJ34BiMc&feature=relmfu
 

H

hover

Member
haris_g said:
dear hover I tend to agree with BerndM, your video wobble is due to cmos sensor getting HF vibrations, might help to balance your props and isolate your camera (maybe also try to mount it on an other place on the copter plate as some edges express more vibration than others) and check again

btw check this video to witness some serious copter wobble due to wrong settings
http://www.youtube.com/watch?v=ITJhJ34BiMc&feature=relmfu
Click to expand...

Thank you, my Graupner propellers are perfectly balanced, checked them yesterday. I think a motor is causing the vibrations.
 



Bowley

Bowley

Member
little nellie said:
Try putting a drop or two of oil on the motor bearing and see any difference.

Silas
Click to expand...


There is much debate about putting oil on bearings, I would tend to agree with those that say bearings should be greased. oil can flush the grease away and make things worse.
 

little nellie

little nellie

Member
Dry bearing also creats high freq buzz.. that is not helping either. Not saying oil is any better than grease. But with the size of these sealed bearing, how can one re-grease them? Personally, I rather have some lube and no lube.

Here is what Innov8tiveDesigns (importer for the Scorpion motor for US) say..

http://www.innov8tivedesigns.com/product_info.php?cPath=70&products_id=372

To keep your brushless motor operating at maximum performance, it is important that the bearings in your motor be properly maintained. This is especially true of helicopter motors that often spin in excess of 45,000 RPM. In an average flight, the motor in a 450 size helicopter spins around almost a quarter million times! Without proper lubrication, the balls in the bearings can wear out quickly, leading to premature failure.
 


Tomstoy2

Tomstoy2

Member
These small motor bearings are shielded, not sealed. Only purpose of the shield is to prevent garbage from getting in. A grain of sand can quickly damage a bearing in no time.

Scorpion sells a nice little oil bottle with a needle to reach into the motor to apply just the right amount of oil.
After applying the oil, spin the motor by hand a few times, wait about 5 minutes for the oil to work it's way into the bearing and spin by hand again, then do the other side.
Re-apply after about 20 flights.

Oil won't fix a damaged bearing, though. Once a ball or race is scratched its toast.

The stickers that the manufacturer places on the bell of a motor off-sets the balance of the motor.
If you have a smart phone, download one of the apps for seismic readings and follow one of the vids that are out to balance a motor. It does make a huge difference in performance and longivity of the motor.
 

H

haris_g

people can fly
BerndM said:
Here is how my GoPro is mounted. A small piece or carpet tape under the camera to keep it from sliding and the 2 rubber bands to hold it on.
Click to expand...

putting some insulating foam at the back of the gopro were it rests against the frame of your quad might help, what do you think?
 

little nellie

little nellie

Member
Tomstoy2 said:
Scorpion sells a nice little oil bottle with a needle to reach into the motor to apply just the right amount of oil.
After applying the oil, spin the motor by hand a few times, wait about 5 minutes for the oil to work it's way into the bearing and spin by hand again, then do the other side.
Re-apply after about 20 flights.

.
Click to expand...

That is what I use on my motor.. I found out it is actually Corrosion-X. The long needle that comes with the kit help getting the lube in the right place.

Did you remove the sticker for better balance?
 

little nellie

little nellie

Member
@BerndM see if you can add a piece of soft rubber, about 1/8" to 1/4" thick between the frame and the GoPro and see if that help. Use velcro or 2 sided tape to secure.

Silas
 


BerndM

BerndM

Member
haris_g said:
putting some insulating foam at the back of the gopro were it rests against the frame of your quad might help, what do you think?
Click to expand...

@BerndM see if you can add a piece of soft rubber, about 1/8" to 1/4" thick between the frame and the GoPro and see if that help. Use velcro or 2 sided tape to secure.

Silas

Did you guys watch my linked video? Do you feel help is needed??
I don't see how the actual video itself could possibly be any more stable.
The somewhat poor flying...well that's all me, but I'm learning.
<:))
 
Last edited by a moderator:




You must log in or register to reply here.
Top