Reversing the motors

[cabinfourus]

I don't know if anyone has tried or not, but I want to reverse the direction of my motors on a 520.
I have a ton of A motors, but only one B motor, and I want to reverse wire the A motor to run as a B.

Can it be done? Does anyone know the pinout of the motors?

 

[Steve Carr]

I believe the motors are all the same. The ESC determines rotation. You just have to change the prop mount on the motor for the new position.

 

[WTFDproject]

As mentioned by @Steve Carr, I'm pretty sure "A" and "B" motors are not different. It is the ESC to which they are connected that determines which way they rotate. What has to change is the propeller adapter. It has to be swapped to match the intended arm position. Which might wind up being the same problem if you don't have a supply of "B" prop adapters.
However, it also seems like Yuneec played games with motor wire color coding. I think there are three color combinations for the short side of the wires (soldered to the ESC board), One color combination has one "A" and one "B" motor. The other two color combinations are either both "A" or both "B". However, all motors have the same three wire colors. To make it work, you have to ensure you get the color of the motor wire attached to the short wire that is labeled to match the motor wire, regardless of the actual color of the short wire. If that makes sense. Sorry. You should be able to see it when you open the shell.

 

[h-elsner]

The direction of a brusless motor depends on the coils, how they are supplied. With other words the rotation is determind by which coil will get power first. The coils create a rotary field.
If you exchange the coils the direction will be reversed. It is very simple: Exchage two of the three wires. For example blue to blue, white to black and black to white.

For the ESC all coils are the same - only the motor knows...

 

[cabinfourus]

As mentioned by @Steve Carr, I'm pretty sure "A" and "B" motors are not different. It is the ESC to which they are connected that determines which way they rotate. What has to change is the propeller adapter. It has to be swapped to match the intended arm position. Which might wind up being the same problem if you don't have a supply of "B" prop adapters.
However, it also seems like Yuneec played games with motor wire color coding. I think there are three color combinations for the short side of the wires (soldered to the ESC board), One color combination has one "A" and one "B" motor. The other two color combinations are either both "A" or both "B". However, all motors have the same three wire colors. To make it work, you have to ensure you get the color of the motor wire attached to the short wire that is labeled to match the motor wire, regardless of the actual color of the short wire. If that makes sense. Sorry. You should be able to see it when you open the shell.
View attachment 32660

It makes sense. I will give it a try.

 

[cabinfourus]

I believe the motors are all the same. The ESC determines rotation. You just have to change the prop mount on the motor for the new position.

I actually thought this could be the case, but knowing Yuneec, I wasn't sure.

 

[h-elsner]

The motors are the same but the arms not. They have different angles og the motor mountiong plate and the horizontal level. If this is by intension (for more stability) or factory tolerances - I don't know.