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-   -   Forward and Reverse are opposite (https://www.rctech.net/forum/radio-electronics/877146-forward-reverse-opposite.html)

dk10438 05-18-2015 05:23 PM

Forward and Reverse are opposite
 
Hi
recently purchased a used Losi SCTE with a Tekin RX8 and Airtronics transmitter.
When I pull the trigger it goes in reverse and vice versa.

I'm able to reverse the motor using the ESC but I'm wondering if the wiring of the motor is reversed, i.e. positive to negative instead of positive to positive.

I looked at the tekin schematics and it the "C" tab on the motor is hooked to the "C" tab on the ESC, however, on the ESC, instead of a black wire its red.

Im thinking the polarity is reversed?
Help!

Socket 05-18-2015 05:32 PM

reconfigure the ESC parameters.

ATXPro4 05-18-2015 06:01 PM

Not sure but make sure that the SCTE doesn't allow you to put the diffs in backwards. If they are backwards it will run backwards.

Cam193 05-18-2015 06:19 PM

Is the motor sensored or sensorless?

dk10438 05-18-2015 06:29 PM

It's a tekin 5.5 turn sensored motor.

I can reconfigure the ESC to run in reverse which makes the forward run forward and backwards run backwards, but I'd rather have it connected correctly

Cam193 05-18-2015 06:32 PM

If the motor is sensorless, you can flip any of the two wires going from the ESC to the motor. (A-B, B-A, C-C). Or, if it's already like that, you can go to (A-A, B-B, C-C).

Jerm13 05-18-2015 07:38 PM


Originally Posted by Socket (Post 14014802)
reconfigure the ESC parameters.

What he said...


Originally Posted by ATXPro4 (Post 14014869)
Not sure but make sure that the SCTE doesn't allow you to put the diffs in backwards. If they are backwards it will run backwards.

Wont work. Cant install them backwards.


Originally Posted by dk10438 (Post 14014789)
Hi
recently purchased a used Losi SCTE with a Tekin RX8 and Airtronics transmitter.
When I pull the trigger it goes in reverse and vice versa.

I'm able to reverse the motor using the ESC but I'm wondering if the wiring of the motor is reversed, i.e. positive to negative instead of positive to positive.

I looked at the tekin schematics and it the "C" tab on the motor is hooked to the "C" tab on the ESC, however, on the ESC, instead of a black wire its red.

Im thinking the polarity is reversed?
Help!

Its a brushless motor. There is not a "positive" or "negative" on brushless motors. That's why there are 3 wires instead of 2. Check you transmitter and see if the throttle "servo" is on normal or reverse. If it has that function, change it. That should do the trick. If your TX doesn't have that option, set your ESC for the other way. There is not a "right or wrong" direction nor will it effect anything. Just make sure your endpoints are set at 100% and recalibrate your ESC when it goes in the correct direction.

If the motor is on one side of the chassis, it will move the car one way. If its on the other side, it will go the opposite way. That's the reason ESC manufactures have this function. Not all cars are laid out the same so you instead of building 2 different ESC to cover this, they put that nifty little option in the software... Good luck.

dk10438 05-18-2015 08:28 PM

thanks
put everything back to default and it seems to work now


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