Hi guys! So basically I upgraded my battery from a 10s3p to 12s3p on my short board. I then changed from Maytech vesc to flipsky 6.6, Bestech D140 charge only BMS. I would first out with Diyeboard, meepo…hub motors. I used them in the past at 1-s with Maytech’s vesc and I like them. Only concern was the speed, being actually 65Kv gives great torque but low speed.
On both the vesc I am using @Ackmaniac’s firmware, connect via CAN BUS. On the new Flipsky 6.6 I first tried BLDC sensorless but the motors really struggle to start even on bench testing, while was fine at 10s before. So I decide to move to FOC sensorless. Weird thing that I noticed, the motors spin in one direction during motor detection, and then they run in the opposite one on street. Is it normal for FOC detection? I repeated the detection like 20 times always the same. No reverse motor configuration enable in the VESC TOOL. Except for that, which doesn’t happen in BLDC, FOC is really deadly silent. I have a weird behaviour when I engage gently the brakes on bench test https://www.youtube.com/watch?v=uybKdKPunB8. Basically they keep spinning really at low speed until I brake stronger (mainly the motor connect to the slave vesc).
Then I thought maybe it’s only on bench test and I tried out on street…The accellaration is really smooth ecc…FOC does remove like 2-3 kmh, but the overall experience is better, bad news they do not brake! Really I was use to a really strong and reliable braking force with these motors at 10s and now that I move to 12s and new vesc they suck. I had to foot brake all the time, that would be expensive if I need to change one shoe every month
Setting are basically the same as before:
I was aalso thinking that maybe now 57V is too low since the battery is 50V fully charged but it doens’t make any sense because it barely brakes at low speed too.
Do you guy have any idea way it sucks like that? am I missing something?
PS: @sayekim Hi man, I know you used meepo hubs at 12s, maybe you see the problem. Thx!
strange that it´s different behavior with the same settings.
I would set the bat min a bit more low like -10, but i think this shouldn´t be the issue.
did you make sure that your remote is calibrated right?
which mode you use, current no reverse with brakes?
I tried with two different remotes, Firefly adn Nano-x. Both well used in the past without problem.
I can lower the battery min but with dual vesc at -6A before I could really brakes strong. To me is more vesc related. Even a slightly better brake force would be still too low. They really do not brake.
Yes I am usign current no reverse with brakes. Watt limited with Ackmaniac firmware. Maybe it doesn’t work well with VESC 6 hardware
The motor detection spinning one way but running spinning another thing on the flipsky vescs is a known issue. It’s a bit strange but just flip your wires and keep it in mind. Weak and a bit weird braking behavior on the flipsky seems to also be a thing. Maybe it has to do with their components choice…
I will try. If that is the braking force I get you can basicaly throw the in the garbage. Better that you test them to because if that is the case we should all together ask Flipsky to fix them or refund us because it’s impossible to use it. I don’t understand how many people said that they are good.
I don’t mind the sound. Besides in foc they aren’t that loud.
I only went hub because I thought to stay stealthy to avoid authorities.
Now riding full gear and going to many group rides that point is kind of mute now.
I will check the error but at really low speed I don’t see how that can be the case. I hope the original firmware will help but also @sofu specified that they have less braking force. She is testing the dual 6.6. I really don’t understand why all the people that used the single 6.6 don’t say that. I didn’t read anything about it.
Out of curiosity, what’re your settings at? So far I’ve tested them on raptor 2 hubs and direct drives and results have been a bit mixed… I’ve yet to test them on a belt drive though so I can’t say for sure if it is actually the vesc…