Hey there. I've been building a custom project using a Bafang G311 from Grin and a 20a Grinfineon controller/Sempu BB/Button Throttle with 48v battery and a 48v-12v regulator directly wired to said battery to power accessories.
I took it for its first test ride, and all seemed largely fine until the motor suddenly cut while hitting the throttle. It wasn't under a whole lot of load, and no weird noise, but it was as if someone had snipped it off. The Cycle Analyst does see throttle input and is sending 3.6v to the controller when I hit it. Everything else still works, reseating connections didn't change anything.
Variables I can think of:
- I extended the motor cable by cutting and splicing 13" of wire into the phase and hall wires and all that, but it seemed fine up until now.
-There was one instance of strain on the cable at the motor side when it inadvertently started slowly spinning and wrapping the cable around itself, but this was stopped pretty quickly. I noticed the Cycle Analyst saw no speedometer signal after this, but I didn't verify that it had one beforehand, either.
- It has some strange behavior sometimes when I turn the battery on: both the CA and 12v systems turn on and then quickly off again. Happens to the 12v whether the controller is on or not. Simply turning it off and on again fixes it and there's no problem past that point. Not sure if related.
I've emailed Grin about this, but I thought I'd throw it out there over here so I can get some insight about how to troubleshoot this. I've opened the motor before to paint the shell, but I'm not sure about accessing it wire-side if those terminals need to be re-soldered.
I took it for its first test ride, and all seemed largely fine until the motor suddenly cut while hitting the throttle. It wasn't under a whole lot of load, and no weird noise, but it was as if someone had snipped it off. The Cycle Analyst does see throttle input and is sending 3.6v to the controller when I hit it. Everything else still works, reseating connections didn't change anything.
Variables I can think of:
- I extended the motor cable by cutting and splicing 13" of wire into the phase and hall wires and all that, but it seemed fine up until now.
-There was one instance of strain on the cable at the motor side when it inadvertently started slowly spinning and wrapping the cable around itself, but this was stopped pretty quickly. I noticed the Cycle Analyst saw no speedometer signal after this, but I didn't verify that it had one beforehand, either.
- It has some strange behavior sometimes when I turn the battery on: both the CA and 12v systems turn on and then quickly off again. Happens to the 12v whether the controller is on or not. Simply turning it off and on again fixes it and there's no problem past that point. Not sure if related.
I've emailed Grin about this, but I thought I'd throw it out there over here so I can get some insight about how to troubleshoot this. I've opened the motor before to paint the shell, but I'm not sure about accessing it wire-side if those terminals need to be re-soldered.