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Nov 03, 2010, 07:05 AM
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Bradenton FL
Joined Apr 2010
808 Posts
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help with new motor won't spin just shudders
I am building my first easystar for fpv but i am having trubble with the motor. I am using a common sense rc Model# 28MM-2000 / 2000 KV motor http://www.commonsenserc.com/product...roducts_id=653 and a 60amp eflight pro esc and eflight 3s 2100mah batteries . it arms it self just fine but when i throttle up the prop just "shutters" back and forth but wont spin.
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Nov 03, 2010, 07:17 AM
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Joined Aug 2007
1,781 Posts
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It sounds like you have lost a motor phase.
It could be a bad connection between the ESC and motor. Check the solder joints and plugs. If you have a meter, measure the resistance between each pair of connectors on the motor (3 combinations). Failing that the ESC could be defective. Try the motor with another ESC. |
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Nov 03, 2010, 09:40 AM
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Canada, ON, Rockland
Joined Aug 2008
19,476 Posts
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Had my E-Flite 60A Pro Esc fail this summer, one phased failed in flight. On the ground if I tried to spool up the motor slowly it would stutter big time but I could get it to spin eventualy. Then when it was spinning I would disconnect one wire at a time and was able to find out which phase died BUT that did not change anything because there were no signs of any damage on the board and shipping from canada would of ended up cost as much. So I replaced it with CC Phoenix ESC and will only use CC from now on....
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Latest blog entry: Get Help by posting your SPM File
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Nov 03, 2010, 01:01 PM
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United States, WA, Woodinville
Joined Mar 2007
7,494 Posts
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usually an indication of a bad solder joint..usually.
resolder the three motor bullets and the three esc bullets. Usually just reheating the solder to get it to melt and flow will solve the issue. Unless you've actually lost a phase in the motor or esc, resoldering cures the shudders. |
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Nov 03, 2010, 01:19 PM
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Canada, ON, Rockland
Joined Aug 2008
19,476 Posts
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Quote:
Come to think about, I haven't seen it lying around lately, I mite of already garbage it. DAMM |
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Latest blog entry: Get Help by posting your SPM File
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Nov 03, 2010, 02:30 PM
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Bradenton FL
Joined Apr 2010
808 Posts
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ok i am going to re-solder them after dinner and we will see!
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Nov 03, 2010, 03:02 PM
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Joined Apr 2009
837 Posts
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What about if slowly raising the throttle works ok but suddenly going from stop to full speed (WOT) results in immediate stuttering, high current and fast drop in battery voltage on Wattmeter? ESC timing, battery's current providing capability or something else?
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Nov 03, 2010, 06:57 PM
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Bradenton FL
Joined Apr 2010
808 Posts
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Yep it was the solder of one of the bullet connectors
Thanks everyone |
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Nov 04, 2010, 10:17 AM
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United States, WA, Woodinville
Joined Mar 2007
7,494 Posts
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Quote:
98% of the time, a shuddering/stuttering motor @ startup is a cold solder joint. 
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