Is a high pitch sound at specific higher rpms. And is weird as I havent notice it in previous version. There was more heard a mechanical noise.
Hi.
Subject: Feature proposal for K1 chip: Sram AXS, Avinox-style shifting, and Zero-Overrun
Hi
I’ve been following your work on the K1 chip for Bafang motors, and it’s truly impressive. I’m reaching out because I have a few feature ideas that could elevate the chip's functionality to the level of top-tier modern drives like DJI Avinox.
I believe these could be implemented by utilizing the shift sensor and brake sensor inputs on the K1 chip. Here is what I have in mind:
Sram AXS Support (Avinox-style workaround)
Concept: Implement a workaround to sync or intercept shifting signals, similar to how DJI Avinox handles wireless integration, allowing the motor to react instantly to AXS shifter inputs.
Smart Shifting (Analogous to Avinox "Smooth Shift" & "Safe Shift")
Concept: * Smooth Shift: Briefly reducing motor torque during a gear change to ensure seamless, crisp shifting under load.
Safe Shift: Protecting the drivetrain by cutting power or limiting torque during abrupt or heavy shifting to prevent chain/cassette damage.
Zero-Overrun
Concept: Eliminating the motor overrun (the short delay where the motor keeps pushing after you stop pedaling). The motor should cut power the exact millisecond the rider stops pedaling or touches the brakes.
Technical Implementation Idea:
To make this happen without redesigning the core hardware, we could potentially feed these control triggers directly through the shift sensor and brake sensor lines on the K1 chip. For instance:
The AXS/shifting logic can trigger the shift sensor input to momentarily drop torque.
The brake sensor logic can be optimized to achieve the instant Zero-Overrun cutoff.
I think these features would make the K1 chip an absolute game-changer for Bafang users who want a premium, modern e-MTB experience.
What do you think about this? Is this something technically feasible within the current K1 architecture? I’d love to hear your thoughts!
Best regards,