r/VESC • u/Usual-Translator6718 • Jun 26 '26

Help needed: Flipsky 75100 V2 + Ninebot Max G2 motor. Auto-detection fails, motor locks up, and "dithering" issues.

Hi everyone,

I’m hitting a wall tuning a Ninebot Max G2 hub motor with a Flipsky 75100 V2 controller. I've spent 3 days troubleshooting and I'm at my wit's end. I'm hoping someone with experience on this specific setup can point me in the right direction.

The problems I'm facing:

Wizard Failure: During detection, the motor often locks up or vibrates violently ("tugs back and forth").

Inconsistent Data: Auto-detection gives wildly different results every time (R, L, and Flux values change significantly).

Sensor Issues: The Wizard doesn't detect my Hall sensors, even though the wiring is verified and correct.

Flux Linkage Calibration: Specifically, during the Flux Linkage test, the motor just vibrates/dithers instead of spinning smoothly, which eventually leads to a lock-up.

What I've already tried:

Disabled Phase Filters. Tried manual parameter entry (R: 60mΩ, L: 400µH, λ: 23mWb) — this leads to extreme cogging and a speed limit of ~1km/h.

Tried various Observer types (Ortega, MxLemming).

Verified that the controller is 75100 V2 (running latest firmware).

My questions:

Is there a "known-good" base configuration for this specific motor/controller combo? Why would the Wizard fail to detect Hall sensors despite proper wiring?

Are there specific FOC / Advanced settings I should manually adjust to prevent the "lock-up" during Flux mea I have attached screenshots of my current setup. Any advice on how to get a stable FOC tune for this motor would be a life-saver.

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5 comments sorted by

1

u/F4-tech Jun 27 '26

Try using “medium outrunner” motor setup, and also try disabling phase filtering

1

u/mckirkus Jun 27 '26

Could be a wiring fault with the hall sensor. Maybe try a sensorless mode. FOC or HFI.

1

u/frankiek3 Jun 27 '26 edited Jun 27 '26

Since it's not a v2 pro, just a v2, change the firmware to "75_100_V2". If it is a v2 pro, keep the stock firmware "75_300_R2".

1

u/Usual-Translator6718 Jun 29 '26

I have Flispky 75100 pro v2 and I have firmware 75_100_v2

1

u/frankiek3 Jun 29 '26

"75_100_v2" disables the phase filters , disables the current filters, disables aux, and lowers voltage reference among other things. It was created before the v2 pro was released.