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« on: November 04, 2017, 10:23:33 PM »
Imperial fire
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Firstly here is the video link.


So.....I have a 2100kv brushless motor ...yeah avionic.
Its spinning a 6*3 inch prop.
Now...
Whenever I go beyond 50% throttle it stops abruptly with a screeching sound.
However if I remove the propeller the motor spins to full throttle...

Firstly I thought there was a problem with the battery unable to keep up to the current demands...so I put a large battery a 3s 2100mah...the problem still persisted..

Then I thought it's the ESC. So I tried a 30a ESC. The problem still persists...
So my problem is.. why is it cutting off power...is the motor doing it???
Maybe the propeller is too large for the motor ( although unlikely cos it can handle a 8 inch prop- specheet)...
But the motor is not supposed to know that it's a large prop it is supposed to demand more power and just spin itself.... And if it's drawing too much power that the battery cannot supply THEN... THE ESC CUTS OFF POWER....

What have I missed..??  Help needed ...
P.s it's a micro brushless motor from rcb...really small and supposed to give up to 400,g thrust ...
I have a beautiful airplane waiting to fly...any help appreciated.
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« Reply #1 on: November 04, 2017, 10:50:04 PM »
kiran rc
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Looks like excessive current is being drawn.
>Check the connections between ESC and motor.

Did you power the motor with excessive voltage before?
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« Reply #2 on: November 04, 2017, 11:06:35 PM »
Imperial fire
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Never powered with excess voltage...but yes I did resolder it's connections...I mean cut the extra motor wire length...then accidentally cut it too short ...and barely managed to resolder it,.... But if the motor starts....then the soldering is correct right??? Or am I wrong here...!!??
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« Reply #3 on: November 04, 2017, 11:39:02 PM »
topalle
Topalle Srinivas Azad
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Try calibrating the ESC.
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« Reply #4 on: November 04, 2017, 11:40:36 PM »
Imperial fire
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Tried no use...
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« Reply #5 on: November 04, 2017, 11:42:03 PM »
topalle
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Did you fully charge the battery?
It might also be caused due to wrong endpoint setting in Transmitter
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« Reply #6 on: November 04, 2017, 11:54:50 PM »
kiran rc
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The wires of this motor are multi-stranded with enamel coating. You need to remove the coating and then solder. Without this there won't be proper contact between the connectors and the wires and hence there will be a surge.

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« Reply #7 on: November 05, 2017, 12:21:57 AM »
Imperial fire
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I will resolder it... This time I will try to get rid of the enamel coating....
Yes batteries were fully charged...and balanced...too....
 Will see what happens on resoldering
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« Reply #8 on: November 05, 2017, 12:24:41 AM »
Imperial fire
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.
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« Reply #9 on: November 05, 2017, 09:38:31 AM »
Imperial fire
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https://drive.google.com/file/d/0B8CiA2hPrWO-QWxGaFl0NE13dG8/view?usp=drivesdk

Found the culprit.... A coil wire has broken.,.. not sure if I can fix this ....
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