Ebike stutters for a sec then spins in forward, but runs smoothly in reverse. Is it a wrong phase wire combination?

[Nazan]

So I recently changed my ebike controller ( dual mode both Square and sinewave supported) and when I did the connections and the self learning and everything was smooth. Then while cruising all of a sudden the motor staterted jerking and i stopped the vehicle when I gave accelerate it became Square Wave. So I changed the wire combination and did self learning again then I became sinewave. But now the motor jerks for a sec then spins which causes the motor to not turn at hills until I give a small push. But in reverse it give instant torque smoothly. Any idea why?

 

[E-HP]

I did reply to that message just now. And here it is again

This one

Nope

 

[Nazan]

You didn’t swap the halls per the chart i linked.

You said I didn't do both. But I did the Phase. The hall sensors I cant cause mine is a connector and i cant find the same connector anywhere near by

 

[Nazan]

Nope

Just check. Before telling someone they haven't done it perhaps

 

[E-HP]

You didn’t. The connector pins need to be swapped. You didn’t do that.

 

[E-HP]

Doing half the steps doesn’t help.

 

[Nazan]

Doing half the steps doesn’t help.

But won't self learning fix that?

 

[Chalo]

But won't self learning fix that?

It should. If you can try another controller that is known to work, do that.

 

[E-HP]

Self learning works most of the time, but not always. In cases where it doesn’t, you have to do the steps manually. Yours obviously is not working, but at least it found a smooth combination, so it makes reversing it easier.

 

[Nazan]

Ok. If I can change the motor direction then that's fine. Cause in opposite direction it perfomanc3 really good. But my question is would it damage the motor. Mine is a direct drive

 

[E-HP]

There are also a few different methods for self learning. The disconnnect and the throttle blip method are a couple for reversing, depending on the controller.

 

[Nazan]

You still didn't reply to my question. My question is would the motor get damaged if the direction is changed from how it used to spin. What I mean is that my motor the brake is on right side and it moves forward. So can I just change the motor side like turn the motor so the brake is on left side and do self learning to change motor direction. And If I do that would the motor get damaged. It does work like that.I tried but I am scared it would get damaged

 

[E-HP]

I didn’t reply because I have no opinion about that question. Seems hokey when you can resolve the technical issue instead, but it’s your bike, so whatever gets you out riding.

 

[E-HP]

The hall sensors I cant cause mine is a connector and i cant find the same connector anywhere near by

Is your hall connector like this or a JST?

https://electricscooterparts.com/images3/CNX-54.jpg

You need a paper clip or tiny screwdriver to remove the pins from the housing in order to swap them.

Similarly with JSTs.

 

[Nazan]

Ok I will try with the hall sensors

 

[E-HP]

That chart was developed by a member of this forum, but I see it referred to all over the internet. Just take your time.