Question Sg900 problem


Distinguished Member
Don’t suppose you have the wrong prop on or it’s upside down , it suggests that as the problem is still there after a motor change , I’m not familiar with this model though ....
Last edited:


Active Member
Not sure about your particular model but most of my drones have three wires running from the ESC to the motors and if there in the wrong sequence the motors can go anti-clockwise ,reversing the wires will make them go clockwise.
The correct configuration is as in the picture below:
prop direction.jpg


Distinguished Member
Does the motor turn at all? If it goes the wrong way, reverse the wires. Your drone has DC motors, not multi phase AC with 3 wires as suggested by someone else.

If the motor is not running at all, most likely the motor driver has failed. I think these are hard soldered to the main board on these, so you might need some specialist help to fix it. Worth checking the wiring has not become disconnected or shorted out first though.


Active Member
I didn't suggest the SG900 had three wires , I wrote " most of my drones have three wires running from the ESC " . I was pointing out that by reversing the wires or in my case re-aranging the wires would make the motor go in the opposite direction.


Novice Member
Might sound daft , but any chance of a video of it running ?
Its actually my friends drone , it looks like its spinning like the rest ok till u try to take off and it won't lift that corner and there seems slight less go about that corner , think hevhas given up and bought another but thanks for ur help 👍


Active Member
In my experience when a drone wont take off on one corner .it's mainly because of reason:

1) the motor is spinning in the wrong direction
2) the prop is CCW instead of CW or visa versa.

It is strange how all motors are turning and all props are spinning but it wont take off.

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