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Old Nov 18, 2012, 11:43 AM
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New Zealand, Hawke's Bay, Napier
Joined Jun 2011
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Balancing Motors

Its easy to overlook a bent motor shaft - a couple of good bangs to a prop is all it takes.
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Old Nov 18, 2012, 11:48 AM
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United States, AZ, Tucson
Joined Mar 2012
3,265 Posts
Quote:
Originally Posted by m_beeson View Post
goldsworthy,

You have to remove the motor,
take the can off,
tap out the bearings,
and press the new ones in,

then you replace the can,
and reinstall the motor.

It is not a quick process, and 6 motors takes longer than 4, so you can count on it taking a little time, but you should be able to finish it in an evening.


FWIW:
I had a brand new set of Avroto motors, and was having issues with the bearings,
so in an effort to find a good solution I replaced them with BocaBearings porcelain bearings, and used their Lightning Lube. It was a good move.
Those motors are real smooth now.
Thanks! I plan on doing this to 2 motors. What tools do I need to remove and tap back in the berings?
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Old Nov 18, 2012, 11:55 AM
Gary
glmccready's Avatar
United States, MD, Salisbury
Joined Mar 2011
2,104 Posts
Sometime the bearings are hard to get out.... This is a nice video (not mine) explaining how:
Brushless Motor Bearing Replacement (7 min 43 sec)


I used a brass (softer metal) screw cut off and sanded flat to bang them out. Getting them back in is the easy part! Also I put my motors in a big plastic bag to remove the clip so it didn't go flying too far.
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Old Nov 18, 2012, 12:21 PM
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Quote:
Originally Posted by glmccready View Post
Sometime the bearings are hard to get out.... This is a nice video (not mine) explaining how:
http://www.youtube.com/watch?v=Kx5gfoApQAg

I used a brass (softer metal) screw cut off and sanded flat to bang them out. Getting them back in is the easy part! Also I put my motors in a big plastic bag to remove the clip so it didn't go flying too far.
THANKS! up till now when I think a bearing is starting to give me trouble I just replaced the motor with a new one. I thought I would try to just replace the bearings in 2 motors and see how it goes. Its probably better than just tossing the old motors in the trash. I have ordered the Bering's they are cheap in price. I will let ya know how it goes.
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Old Nov 18, 2012, 12:34 PM
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T J Gilbert's Avatar
United States, MS, Ridgeland
Joined Feb 2009
4,848 Posts
Success!

I got the new Naza (Naza #3) that I purchased from UAVP in the mail yesterday.
I got everything reconnected/setup.
I held my breath, powered the transmitter, and plugged in the Naza battery.
Naza #3 made the VU's LED flash rapid yellow (Naza #2 = rapid red).
I thought that good as there was a difference.
I plugged in the USB to the VU with the Assistant up on my computer.

---AND----

Solid bright green LED!
Naza #3 recognized by Assistant!

I'm back!
Man, it feels good to know that all that malfunctioning was a bad Naza, and not me or my computer.
Naza #2 is on it's way to UAVP. If it or a replacement finally returns, I'll have a spare.
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Old Nov 18, 2012, 12:39 PM
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United Kingdom, Bracknell
Joined Nov 2000
11,642 Posts
Glad you're back up and running TJ!

Had my F550 out for a little tweaking today ... gains now set to 330 pitch & roll, 300 yaw and 250 altitude.
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Old Nov 18, 2012, 12:42 PM
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United States, AZ, Tucson
Joined Mar 2012
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Quote:
Originally Posted by T J Gilbert View Post
I got the new Naza (Naza #3) that I purchased from UAVP in the mail yesterday.
I got everything reconnected/setup.
I held my breath, powered the transmitter, and plugged in the Naza battery.
Naza #3 made the VU's LED flash rapid yellow (Naza #2 = rapid red).
I thought that good as there was a difference.
I plugged in the USB to the VU with the Assistant up on my computer.

---AND----

Solid bright green LED!
Naza #3 recognized by Assistant!

I'm back!
Man, it feels good to know that all that malfunctioning was a bad Naza, and not me or my computer.
Naza #2 is on it's way to UAVP. If it or a replacement finally returns, I'll have a spare.
See I told ya T J! money solves every problem in R C!
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Old Nov 18, 2012, 01:06 PM
Gary
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United States, MD, Salisbury
Joined Mar 2011
2,104 Posts
TJ: glad you figured it out! I had a glitch about every 8-10 flights, and had a heck of a time figuring it out, till the ESC finally failed completely. I exchanged motors, esc, and even the controller, all was fine, till it would crash.
Goldsworth: yea the Boca bearings are inexpensive and mush better than the stock that came with my RC timers, I replaced them all for $10, and an afternoon.
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Old Nov 18, 2012, 01:41 PM
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USA, NH, Alstead
Joined Oct 2007
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Quote:
Solid bright green LED!
Naza #3 recognized by Assistant!

I'm back!

A struggle for sure, but ALL GOOD NOW.
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Old Nov 18, 2012, 02:18 PM
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T J Gilbert's Avatar
United States, MS, Ridgeland
Joined Feb 2009
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Struggle = Experience & Lesson Learned!

Quote:
Originally Posted by u2builder View Post
A struggle for sure, but ALL GOOD NOW.
I was an unwilling guinea pig on a lot of things we tried. I'll take some knowledge away from the experience and use it to help others...

I think I know how predictable Assistant connection from Naza to Naza should be.
I also know what a defective Naza's LED flash most likely is.
Powered up a Naza with a lot of things disconnected that usually are.
Tried the F1/F2 fix and know what at least a defective Naza does when you do.
Probably a lot more that I don't recall...
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Old Nov 18, 2012, 02:27 PM
I hate waiting for parts
Mike_Then's Avatar
United States, NC, Garner
Joined Apr 2001
6,729 Posts
Quote:
Originally Posted by T J Gilbert View Post
I got the new Naza (Naza #3) that I purchased from UAVP in the mail yesterday.
I got everything reconnected/setup.
I held my breath, powered the transmitter, and plugged in the Naza battery.
Naza #3 made the VU's LED flash rapid yellow (Naza #2 = rapid red).
I thought that good as there was a difference.
I plugged in the USB to the VU with the Assistant up on my computer.

---AND----

Solid bright green LED!
Naza #3 recognized by Assistant!

I'm back!
Man, it feels good to know that all that malfunctioning was a bad Naza, and not me or my computer.
Naza #2 is on it's way to UAVP. If it or a replacement finally returns, I'll have a spare.
Hooray! Glad you're back in business!!
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Old Nov 18, 2012, 04:34 PM
Having fun again!!
MTHead4u's Avatar
United States, AZ, Queen Creek
Joined Aug 2012
87 Posts
Quote:
Originally Posted by T J Gilbert View Post
I got the new Naza (Naza #3) that I purchased from UAVP in the mail yesterday.
I got everything reconnected/setup.
I held my breath, powered the transmitter, and plugged in the Naza battery.
Naza #3 made the VU's LED flash rapid yellow (Naza #2 = rapid red).
I thought that good as there was a difference.
I plugged in the USB to the VU with the Assistant up on my computer.

---AND----

Solid bright green LED!
Naza #3 recognized by Assistant!

I'm back!
Man, it feels good to know that all that malfunctioning was a bad Naza, and not me or my computer.
Naza #2 is on it's way to UAVP. If it or a replacement finally returns, I'll have a spare.
Sweet!! Spares are always good..

I was having the same issue (getting the same message) today when trying to connect, turns out that my Naza doesn't like being plugged into powered USB hubs I guess, something I got to remember before freaking out.

Connected it straight to the laptop USB and she fired right up. Just little something for others to remember too.
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Old Nov 18, 2012, 06:22 PM
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BerndM's Avatar
Near Disneyland in Placentia, Southern California, USA
Joined Aug 2004
500 Posts
Quote:
Originally Posted by u2builder View Post
Is there a way to balance the motors without a cell phone and "app"? I don't have a cell phone so that method is not available to me but I would like to be able to balance the motors.

BTW, I tried several types of vibration mounting and actually get the best Go Pro pictures from a rigid mount. I did purchase a flex mount from a fellow in Israel who sells them on Ebay but haven't tried it yet.
There is a method that is REALLY subjective, using just your eyes.

I have to assume you will be balancing ONE motor at a time, PROP REMOVED, right?
If so, place your flyer on a HARD surface, get a clear glass, and 3/4 fill it with water. Set the glass on top of the arm with the motor being tested. Run the motor and observe the vibrations on the water surface. Make changes to the motor balance as needed and rerun the test and mentally compare the vibrations.
Primitive and crude but fairly functional.

Regards
Bernd

Witespy-DJI NAZA F450 Flamewheel
2212/920kv DJI motors and Opto 30A ESC's
10x5 Graupner Props / GoPro HD2
AUW 3S-2200mah = 1100g / 3S-4000mah = 1305g
Spektrum TX DX-7 (original) / Spektrum RX AR6200
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Old Nov 18, 2012, 06:25 PM
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United States, AZ, Tucson
Joined Mar 2012
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Quote:
Originally Posted by BerndM View Post
There is a method that is REALLY subjective, using just your eyes.

I have to assume you will be balancing ONE motor at a time, PROP REMOVED, right?
If so, place your flyer on a HARD surface, get a clear glass, and 3/4 fill it with water. Set the glass on top of the arm with the motor being tested. Run the motor and observe the vibrations on the water surface. Make changes to the motor balance as needed and rerun the test and mentally compare the vibrations.
Primitive and crude but fairly functional.

Regards
Bernd

Witespy-DJI NAZA F450 Flamewheel
2212/920kv DJI motors and Opto 30A ESC's
10x5 Graupner Props / GoPro HD2
AUW 3S-2200mah = 1100g / 3S-4000mah = 1305g
Spektrum TX DX-7 (original) / Spektrum RX AR6200
Its also a lot less money than a Apple I Phone!
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Old Nov 18, 2012, 11:36 PM
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Joined Dec 2011
340 Posts
Hey Bernd! Been a while, hope your doing well and having fun. That's a very good way to test, never thought of that.

I used the vibration software on my iPhone, which worked very well also. Just sit the iPhone on the arm your testing, similar to what you explain here. The only difference is the software records the "Peak" and "Average", making comparisons easier.

Hey, I just put together this travel case for a trip I'm taking to Cancun in a few weeks with the wife. Should get some good video!

Cheers.

Quadcopter Case - Pelican (2 min 13 sec)


Quote:
Originally Posted by BerndM View Post
There is a method that is REALLY subjective, using just your eyes.

I have to assume you will be balancing ONE motor at a time, PROP REMOVED, right?
If so, place your flyer on a HARD surface, get a clear glass, and 3/4 fill it with water. Set the glass on top of the arm with the motor being tested. Run the motor and observe the vibrations on the water surface. Make changes to the motor balance as needed and rerun the test and mentally compare the vibrations.
Primitive and crude but fairly functional.

Regards
Bernd

Witespy-DJI NAZA F450 Flamewheel
2212/920kv DJI motors and Opto 30A ESC's
10x5 Graupner Props / GoPro HD2
AUW 3S-2200mah = 1100g / 3S-4000mah = 1305g
Spektrum TX DX-7 (original) / Spektrum RX AR6200
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