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Pro tips for getting rid of last bit of jello? Fine tuning 2 axis basecam gimbal?

I have a quadcopter build up with a simple $60 basecam gimbal, a mobius camera, and I have finally got some better motors, the $60 set of EMAX 2213 brushless motors with standard nylon props. (I am still a noob at flying, esp. FPV. on-screen.)

(previously, I have been using those notoriously bad genaric china orange/silver 2212 motors 2 of which even had loose, rattly bearings! I did not even bother attempting to ballence since the aluminum prop holders were bent, and some even had partially stripped threads! They were really needing to be replaced!)

The gimbal is CNC aluminum mounted, and has 4 rubber suspensions that are supposed to isolate vibration, but they do not remove jello completly. (getting the new miles better EMAX motors and going the best to ballence the props and hubs definitely helped, but did not remove jello entirely.)

https://www.youtube.com/watch?v=hajzljufl2I

On every crash, the rubber suspension ball things would pop out, and they did quickly wear out, and one of them ripped right apart, so I bought more. They are the same stiffness, I could not source a large quantity of more flexible ones unfortunately. Not for a decent price, anyway. So other than balancing the props with a simple prop balancer, and changing out the rubber balls, what can I do to get the jello down more?

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rickharris2 years ago

If you don't balance the props and motors your not going to get it to be clean.

www.flitetest.com

-max- (author)  rickharris2 years ago
My props and motors are ballenced to the besy t of my abilities, and the link you posted returned no results. I am looking for the not obvoise tips that I may not have heard if.

Odd the link works for me as do the 2 below.

Flitetest (look it up in goolgle) has a load of detailed information on flying multi rotors, how to build them and how to use them including articles on jello reduction - You may have to work through a lot of information - I fly fixed wing so am not going to do it for you.

Jello effect is vibration - you need to isolate the camera from vibration OR remove the vibration.

-max- (author)  rickharris2 years ago

I tested the links from mobile, and oddly they all simply take my to the main site. IDK why. Tested the links on the desktop and they work fine.

I already mentioned I know how to ballence props, I have balanced them 'perfectly' and I do not feel much vibration in the arms of the quad.

This is the gimbal mount I have, you can see the rubber mounts that are being used for vibration isolation. http://smile.amazon.com/Brushless-Camera-Gimbal-Co...

Have you thought of going back in time for an old idea? ;)
Using springs with the right lenght and tension you could make a cam mount similar to the golden days microphones.

You know the carbon ones in the big ring with 4 or 6 springs?
It works similar to the stands for high end audio equippment were a pointy cone tip is the resting point for the equippment.
The extreme pressure on the tiny surface area makes the transmission of vibrations next to impossible.
Same applies for the springs as they only have a point of contact on the mounts.

But for startes I would consider the rubber mounts in CD and DVD drives of the old kind.
They hold the drive in the frame and if you use two for each gimbal mount (one on top, one at the bottom) it should cancel out a bit more of the vibrations.
The gimbal would basically be suspended between two rubber dampeners with no screw connection to the chassis.
Depending on the type of rubber mount you might need a rubber sleeve over the screw so it won't touch the mounting plate, but most of the rubber thingies have a lip that goes into the mounting hole anyway.

-max- (author)  Downunder35m2 years ago

I might give springs a try. However, the issue is that they will ring at some resonant frequency, because they do not have ant dampening to oscillations at their natural frequency. Because the quad's props will be spinning at various speeds, and will have lots of harmonics too, I suspect that it will not work too well.

"But for startes I would consider the rubber mounts in CD and DVD drives of the old kind."

Sounds like a good idea, but the gimbals on the market have already employed something similar to this: https://www.google.com/search?q=rubber+dampening+b...

-max- (author) 2 years ago

http://www.rcgroups.com/forums/showthread.php?t=2398262

-max- (author) 2 years ago

I just rewatched that footage to find that jello did not plague it too badly. However, nearly ever other video I have made before and since this one has slight intermittent jello.