I've decided to go all-in and install the opensource firmware and LCD3, wow! I've just finished my test ride using this firmware. Changed the configuration a bit to prevent an accidental run away because I'm not using ebrakes. Left all other settings default. Compiled the firmware. After the programming the generated hex file I did a basic configuration using the LCD. Maximum power set to around 600W (12A @ 48V). All my previous issues are gone now! Okay, walk assist isn't supported yet but I personally don't need that
Casainho you did a wonderful job! This is GOLD. The power, the smoothness... It's amazing! I still have a smile on my face. The bike feels very responsive and is very fast and agile whenever you need it to. It was also very smooth and powerful on a small hill.
I did some tests at the traffic lights to try to get the bike to run away from me by pressing hard on the pedals and such, I did not succeed. To me it feels very safe now. BUT, I've changed the MOTOR_ASSISTANCE_CAN_START_WITHOUT_PEDAL_ROTATION setting in the firmware. This makes all the difference.
The only thing I still hope for is a little bit more cadence. Now the motor seems to cut off at around 100 RPM, I would prefer it to be a bit higher. Maybe my configuration isn't optimal yet. What are the correct settings for 36v motor and 48v battery?
Other things I've noticed using this firmware:
- The motor runs very smooth. Even at start from zero there is no more rough feeling I used to have with the original firmware.
- I have the feeling that it runs quieter now but I'm not sure. But it's definitely quiet, even at high speed.
- At higher assist levels it's super responsive, at lower levels it's more relaxed. I like both options. And the ability to quickly switch between these characteristics during the ride is superb.
Some questions:
- I'm not able the get the battery state (percentage) on the LCD. Maybe I'm configuring it incorrectly?
- What kind of amp limit or power are you guys using? I've noticed that after running 600W consistenly for a while (headwind) the motor is a bit warm (not hot).
- How much voltage drop under load is expected? I can imagine that the battery voltage drops when high power is requested. In my case this causes the battery indicator on the LCD to change a bit during the ride, e.g. voltage drops from 51v to 49v when requesting 600W.