The Mighty Volt
1 MW
Hi again
Just wanted to upload a few videos of a recurring "problem" with my front hub {Sensorless Aetoma, 36v 20Ah rated ductape Lifepo}.
I understand that sensorless motors prefer, though do not demand, a rolling start.
Today, I went out for a proper cruise, and drew 12Ah out of the 20AH rated pack.
Towards the end of this run, during which the motor had behaved impeccably, I began to encounter a disturbing pattern of vibration when attempting to accelerate from a low speed. This chugging vibration was actually quite disconcerting, and was amplified by moderate increases in the grade of the road I was travelling on.
At speed, and going downhill, It would pan out and disappear fully even at full throttle. But as soon as I hit the next hill, even hard pedaling in a high gear resulted in chugging, even with gentle throttle.
I could best describe it as the e-bike equivalent of axle-hop that solid-axle RWD muscle cars experience. Its like the wheel is hopping itself off the ground rather than rolling forward.
Again, this seems more prevalent at the very end run than at the beginning, and is more prevalent going up hills and during sudden application of stress to the motor/controller/battery.
The nuts are not loose! I checked and double checked.
http://www.youtube.com/watch?v=7ybGrFYqfnM&feature=channel
http://www.youtube.com/watch?v=vvAPVqiZX1E&feature=channel
Specifically, keep your ears open for a vibrating/metallic sound when the wheel IS NOT spinning. I have applied little throttle and pinned the bike with my weight to simulate hill climbing/stress.
Just wanted to upload a few videos of a recurring "problem" with my front hub {Sensorless Aetoma, 36v 20Ah rated ductape Lifepo}.
I understand that sensorless motors prefer, though do not demand, a rolling start.
Today, I went out for a proper cruise, and drew 12Ah out of the 20AH rated pack.
Towards the end of this run, during which the motor had behaved impeccably, I began to encounter a disturbing pattern of vibration when attempting to accelerate from a low speed. This chugging vibration was actually quite disconcerting, and was amplified by moderate increases in the grade of the road I was travelling on.
At speed, and going downhill, It would pan out and disappear fully even at full throttle. But as soon as I hit the next hill, even hard pedaling in a high gear resulted in chugging, even with gentle throttle.
I could best describe it as the e-bike equivalent of axle-hop that solid-axle RWD muscle cars experience. Its like the wheel is hopping itself off the ground rather than rolling forward.
Again, this seems more prevalent at the very end run than at the beginning, and is more prevalent going up hills and during sudden application of stress to the motor/controller/battery.
The nuts are not loose! I checked and double checked.
http://www.youtube.com/watch?v=7ybGrFYqfnM&feature=channel
http://www.youtube.com/watch?v=vvAPVqiZX1E&feature=channel
Specifically, keep your ears open for a vibrating/metallic sound when the wheel IS NOT spinning. I have applied little throttle and pinned the bike with my weight to simulate hill climbing/stress.