I recently made an electric mountainboard. Its awesome! But there is a critical issue that I am having with it. For some reason, while riding the wheels lock-up and I get thrown off. Luckily, this has only happened at relatively low speed, but was still enough to mess up my ankle. At my board’s top speed of 50km/h though, this could be a life threatening issue. since it happens so fast, and only once in a while, I have not been able to pinpoint if it is one or both of the drive wheels that lock up.
Anyone have any suggestions?
The build uses:
2x 55mm motors
2x hobbywing max6 ESCs
1x arduino/ Hc-05 bluetooth module
2x multistar 10amp batteries in parallel
and a chaindrive
If they are locking up and not turning, I would say it would be two of your motor leads are shorting out, either where they connect with the esc or internal
Too many variables, your remote could be cutting out and could be actuating 100% brake on failsafe. It would be rare that both motors would short out due to them being on there own speed controllers
Okay I have a spare motor, so maybe I’ll try swapping one out. I noticed that one of them was making a weird scraping noise when I received it. if they were shorting, wouldn’t they lock up on each rotation though? sometimes this problem presents itself 15 minutes into a ride.
Yeah I think it might just be one motor that is seizing, but its hard to say for sure. I’m using my phone to control the arduino via bluetooth. It never failed before on my previous longboard build, but that was also a different ESC/Motor combo.
I just tested the thing, and it looks like the problem is only on the left wheel. It suddenly stops, even when it is in the throttle up position. The right has not presented the issue YET. Although the right is giving me a strange vibration that i’ll deal with later.
Also worth mentioning that the primary ESC on the left is the only one that powers the arduino setup. The secondary ESC only receives the signal wire. (not sure if that would cause any problems)
I’ll probably look into that too. I just tested the thing, and it looks like the problem is only on the left wheel. It suddenly stops, even when it is in the throttle up position. The right has not presented the issue YET. Although the right is giving me a strange vibration that i’ll deal with later.
Also worth mentioning that the primary ESC on the left is the only one that powers the arduino setup. The secondary ESC only receives the signal wire. (not sure if that would cause any problems)
Program of the arduino was sending a less than minimum speed signal to the ESC upon loss of bluetooth signal, causing wheel lockup. Code altered to fix this.
Throttle returning to neutral position was also sending a less than minimum speed signal, causing lockup due to improper calibration of the ESC throttle. Correct calibration fixed this issue