After a year and half that my skateboard was stored, i came back to use it.
Nothing changed mechanically speaking.
When im starting my ride at about 1-3 degrees angle uphill, the motor is unable to push me and making scaring high tone of electrical sound. I must push to start the ride. Using single flipsky 6374 140 KV + flipsky VESC on a 10s lipo batts.
What could possibly be the issue?
Does it work fine above 1km/hr, but does that only at 0km/hr?
Yes. Above 1kmh its acting absolutely normal.
Your motor sensors aren’t working. Use HFI. You might have to tune it, which is a hassle. Or fix your motor sensors. Did the motor get wet? Motors are generally waterproof except the bearings and sensors.
It did not get wet. Stored in a safe and dry place.
Is HFI is the best configuration for sensorless?
“Best” can mean any of a thousand things. It depends what your goals are. Are you optimizing for performance at any cost? Are you optimizing for cost at any performance? Are you optimizing for completion speed at any cost? Are you optimizing for completion speed at any performance? Are you optimizing for appearance? Are you optimizing for getting a good grade on a homework assignment? How heavy is the rider? Is kick-pushing a problem? Do you know about hip-flicks? Do you mostly ride on paved streets? Do you live/ride in a hilly area? Is this vehicle a toy and not a tool? How important is reliability?
Without a ton more information, “best” can’t really be determined.