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Old Jan 31, 2013, 12:58 PM
I never finish anyth
United States, TX, Houston
Joined Jan 2012
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90% of all videos I have seen like yours is because of the male end having a bad solder. Resoldering normally makes the problem go away in most cases but i'd fly over grass for a little while. Also while you are doing it... might as well do all motors you have in case it was a batch problem from the factory.... and believe me, you aren't the only one having issues.
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Old Jan 31, 2013, 01:03 PM
QuaDreko pilot :)
Drekavac's Avatar
Slovenia, Kamnik
Joined Oct 2010
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Yes, my intention was to resolder all of the motors, I just didn't know, if I should check and resolder ESC's also.
Thanks again MCrites.
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Old Jan 31, 2013, 01:05 PM
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United States, NC, Charlotte
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Quote:
Originally Posted by MCrites View Post
90% of all videos I have seen like yours is because of the male end having a bad solder. Resoldering normally makes the problem go away in most cases but i'd fly over grass for a little while. Also while you are doing it... might as well do all motors you have in case it was a batch problem from the factory.... and believe me, you aren't the only one having issues.
Thermal imagers small enough to fit on key chain are cheap an an excellent tool for checking connections at the amps we draw. Will show up a bad solder joint or poor continunity across connection.

Tim
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Old Jan 31, 2013, 01:06 PM
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T J Gilbert's Avatar
United States, MS, Ridgeland
Joined Feb 2009
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Test Fly Over Grass!

Quote:
Originally Posted by Drekavac View Post
Yes, my intention was to resolder all of the motors, I just didn't know, if I should check and resolder ESC's also.
Thanks again MCrites.
And like MCrites said, test fly over grass...
If you'd have been over grass in the video, you'd probably not have broken your props.
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Last edited by T J Gilbert; Jan 31, 2013 at 01:37 PM. Reason: Can't spell
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Old Jan 31, 2013, 01:07 PM
Habitual Line Stepper
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United States, WA, Redmond
Joined Dec 2011
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Quote:
Originally Posted by w4yn View Post
Thermal imagers small enough to fit on key chain are cheap an an excellent tool for checking connections at the amps we draw. Will show up a bad solder joint or poor continunity across connection.

Tim
you have a link?
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Old Jan 31, 2013, 01:14 PM
I never finish anyth
United States, TX, Houston
Joined Jan 2012
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Quote:
Originally Posted by w4yn View Post
Thermal imagers small enough to fit on key chain are cheap an an excellent tool for checking connections at the amps we draw. Will show up a bad solder joint or poor continunity across connection.

Tim
For under $1500?
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Old Jan 31, 2013, 01:18 PM
Habitual Line Stepper
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United States, WA, Redmond
Joined Dec 2011
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that's why I ask

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Originally Posted by MCrites View Post
For under $1500?
he said small and cheap, although cheap is a relative term..
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Old Jan 31, 2013, 01:54 PM
Doing stuff since 1902.
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France, RA, Grenoble
Joined Dec 2004
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Its a bit sad that we have to doubt the quality of DJI links, they market themselves as a serious company, and its not like soldering was invented last week...
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Old Jan 31, 2013, 02:02 PM
QuaDreko pilot :)
Drekavac's Avatar
Slovenia, Kamnik
Joined Oct 2010
116 Posts
I think I found the problem.
It was bad connection between male and female bullet connector.
Look at the photo, am I right?
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Old Jan 31, 2013, 02:11 PM
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United States, MS, Ridgeland
Joined Feb 2009
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Male Connector

Quote:
Originally Posted by Drekavac View Post
I think I found the problem.
It was bad connection between male and female bullet connector.
Look at the photo, am I right?
Was the male connector loose in the middle female when you pulled it out?
There's definitely been some arcing or there's corrosion in the middle female.
Clean her up, test and/replace the male, and you should be okay...
Get that corrosion out. It's what's causing and exacerbating the poor connection...
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Old Jan 31, 2013, 02:19 PM
QuaDreko pilot :)
Drekavac's Avatar
Slovenia, Kamnik
Joined Oct 2010
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No, it was not loose. But the contact was bad.
I will clean it, or maybe replace it.
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Old Jan 31, 2013, 03:35 PM
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United States, MS, Ridgeland
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Connectors

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Originally Posted by Drekavac View Post
No, it was not loose. But the contact was bad.
I will clean it, or maybe replace it.
Bad connectors cause 90% or more of electronic failures.
A cleaner/lubricant might be warranted for the environment where you fly, or the connector may have come to you dirty.
I use a connector lubricant and so does U2builder.
I'm not where I can get the name off mine, maybe U2 is at home?
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Old Jan 31, 2013, 04:19 PM
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Quote:
Originally Posted by T J Gilbert View Post
Bad connectors cause 90% or more of electronic failures.
A cleaner/lubricant might be warranted for the environment where you fly, or the connector may have come to you dirty.
I use a connector lubricant and so does U2builder.
I'm not where I can get the name off mine, maybe U2 is at home?
I am using the contact grease for spark plugs on mine...call me crazy but...any how thats what I use especially since there is a lot of moisture and dirt where I fly so at take off I usually get a wet underside (also where the ESC's are) so the plug grease has stopped a lot of issues. Just dont over do it! Just enough to coat the male end with a light film!
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Old Jan 31, 2013, 04:42 PM
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USA, NH, Alstead
Joined Oct 2007
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GB OX-GARD is a good product. It is available at most hardware stores. I believe it is a conductive grease with tiny metal particles. It is used to prevent corrosion in electrical connections. Do NOT use dielectric grease. That is an insulator.

I have adopted a recommendation on this thread, I think by Bill Glover, to replace all of the connectors with Protek bullets available from A Main Hobbies. These do not have the swivel cage, and but rather have a solid split male plug. They are also easier to solder because there is a little cut out in the side of the cup so you solder the wire onto the side of the cup rather than trying to "dip" it into a pool of solder. After several problems with connectors, some of which did not happen right away, I replaced all the connectors on my quad and my hex.

Read this and you will probably want to have a tube of OX-Gard on hand. It also explains why not to use dielectric grease.

http://www.olypen.com/craigh/oxgard.htm
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Old Jan 31, 2013, 09:15 PM
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Quote:
Originally Posted by MCrites View Post
For under $1500?
Less than $100 Tim
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