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Old Oct 11, 2012, 10:28 PM
Teamsherman is offline
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Hey folks,

Just having a bit of grief getting my quad to yaw properly. Every time i yaw either way, once i release the yaw stick my quaqd blips with power and bounces up about a foot high. Sometimes when using the yaw control the quad climbs too.

I have tried little gain, and ive tried lots of gain and tried a few numbers in the middle and i just cant tune it to yaw nice and smooth.

Any tips i should try?
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Old Oct 12, 2012, 01:33 AM
SCVJeff is offline
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Quote:
Originally Posted by wdelarme View Post
Will now be offereing the shielding to the NAZA GPS protector for a total cost of $15.00 shipped. I will shield it, you will need to supply the 22 awg +- to connect it to the aircraft ground

No soldering on the gps protector at all the sheilding is conductive on both sides I will also ship with extra piece of copper tape to make the connection to the shielding


Please excuse the meter it won't go to total 0 since the leads are about 10 years old but this is connected to the drain/ground wire and touching the meter to any part of the shielding
Good idea, but you are not creating a simple electrical ground, it's an RF ground that's way better off with a thin strip of flat copper. It needs to be a solid BOND, not just electrically grounded as reported by an ohm meter with a 22meg-ohm impedance. (and at RF that little wire could easily radiate parasitically. Take a piece of 14ga THHN and hammer it into a copper grounding strip. Either way I like the copper cup.
Old Oct 12, 2012, 05:05 AM
EarthOrbiter is offline
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Yaw twisting


Quote:
Originally Posted by Teamsherman View Post
Hey folks,

Just having a bit of grief getting my quad to yaw properly. Every time i yaw either way, once i release the yaw stick my quaqd blips with power and bounces up about a foot high. Sometimes when using the yaw control the quad climbs too.

I have tried little gain, and ive tried lots of gain and tried a few numbers in the middle and i just cant tune it to yaw nice and smooth.

Any tips i should try?
I just move the yaw to the center slower. Sometimes I forget, let go, and it jumps. What is going on is the rotary motion of the counter direction of the propellers give it the yaw movement ability with a given rpm.
"Yaw is induced by mismatching the balance in aerodynamic torques (i.e., by offsetting the cumulative thrust commands between the counter-rotating blade pairs). " From http://en.wikipedia.org/wiki/Quadrotor.
This is a characteristic.
It would be nice to have a time dampening of the PPM signal that would be adjustable and make it smoother.
Old Oct 12, 2012, 05:12 AM
EarthOrbiter is offline
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Anti Vibrating


Does anyone have any experience using Alpha gel or Sorbothane mounts to lessen vibration transfer to a camera? A little research regarding such mounts along with balancing props is the way to go. Alpha gel is expensive.
Old Oct 12, 2012, 08:25 AM
T J Gilbert is online now
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Mike_Then...


I'm glad that things have improved.
You are taking the approach that will yield success.
As a technical person, you know that a technical hobby can't escape being technical...
Damn, I sound like Yogi Berra!
Old Oct 12, 2012, 08:31 AM
wdelarme is offline
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That sounds like a great idea. Like I said I am not supplying the ground wire. the picture was more of a proof of concept. I was actually looking for a piece of braided flat copper but I haven't been able to find a small piece (low weight)

Quote:
Originally Posted by SCVJeff View Post
Good idea, but you are not creating a simple electrical ground, it's an RF ground that's way better off with a thin strip of flat copper. It needs to be a solid BOND, not just electrically grounded as reported by an ohm meter with a 22meg-ohm impedance. (and at RF that little wire could easily radiate parasitically. Take a piece of 14ga THHN and hammer it into a copper grounding strip. Either way I like the copper cup.
Old Oct 12, 2012, 10:49 AM
Bill Glover is offline
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Originally Posted by wdelarme View Post
I was actually looking for a piece of braided flat copper but I haven't been able to find a small piece (low weight)
De-soldering braid?
Old Oct 12, 2012, 10:53 AM
u2builder is offline
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Where does the ground attach to the airframe, ie. what is "ground" on the airframe? Thanks.
Old Oct 12, 2012, 11:00 AM
Mike Freas is online now
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Quote:
Originally Posted by u2builder View Post
Where does the ground attach to the airframe, ie. what is "ground" on the airframe? Thanks.
The ground for the airframe is right next to the positive.
Old Oct 12, 2012, 11:26 AM
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Looked at that too. The best way to run the ground from shielding I have found is to run a strip of copper shielding to the outside of the guard. ..then run it down the stand...I'm not sure the best way to connect it to the aircraft. I imagine each aircraft would be different. for example my quad is made of wood. I may have more of a run than say a user with a metal frame.

Any suggestions?

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Originally Posted by Bill Glover View Post
De-soldering braid?
Old Oct 12, 2012, 11:27 AM
kd4wen is offline
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Just a yard bird
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Originally Posted by Mike Freas View Post
The ground for the airframe is right next to the positive.
This would be considered the electronics ground in most cases due to most multi rotor airframes do not consist of an airframe ground. I guess if you had a pure all carbond fiber frame you could tap the electronics ground onto it some where.
Old Oct 12, 2012, 11:33 AM
Mike_Then is online now
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Quote:
Originally Posted by EarthOrbiter View Post
Does anyone have any experience using Alpha gel or Sorbothane mounts to lessen vibration transfer to a camera? A little research regarding such mounts along with balancing props is the way to go. Alpha gel is expensive.
Some have used Moon Gel with good success. I tried it and didn't have much luck but admittedly, I only tried it once. I've had much better luck using foam earplugs. That's what I plan to use for mine.

Quote:
Originally Posted by T J Gilbert View Post
I'm glad that things have improved.
You are taking the approach that will yield success.
As a technical person, you know that a technical hobby can't escape being technical...
Damn, I sound like Yogi Berra!
Yup, just have to remember it takes patience... something that can be in short supply with me sometimes. The weather is beautiful today so I'm definitely going to try to fly it again.
Old Oct 12, 2012, 11:46 AM
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Originally Posted by EarthOrbiter View Post
Does anyone have any experience using Alpha gel or Sorbothane mounts to lessen vibration transfer to a camera? A little research regarding such mounts along with balancing props is the way to go. Alpha gel is expensive.
I've picked up some .50 sorbothane (at amazon), recently. Didn't have time to test it properly yet but run some motor tests using the iphone vibration app. Looks promising. On average, it reduces motor vibes by 50%. The overall frame vibration measured at the center of the F550 top plate showed a 40% reduction. I hope to test it in flight today, late evening.
Last edited by jamac; Oct 12, 2012 at 12:25 PM.
Old Oct 12, 2012, 12:22 PM
kd4wen is offline
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Check out the new behemoth from Dex's frame line up Look out S800 lol
Old Oct 12, 2012, 12:26 PM
paulinfrance is offline
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Living in the south of France
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Quote:
Originally Posted by kd4wen View Post
Check out the new behemoth from Dex's frame line up Look out S800 lol
It looks like a Klingon warship,,,


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