So my replacement pulleys from johnny arrived on Thursday and I installed them and the new 90mm wheels today, then took the board out for a test ride. First thing I noticed, 90mm is fantastic compared to ~60 Second, I noticed that now that I’m using a 15mm belt and pulleys instead of the paltry 9mm, I get 0 belt slippage no matter how hard I accelerate or brake. Woo!
Unfortunately I’m facing a strange issue. When I accelerate hard the board instantly throws me off forwards. It’s not just cutting the power, it’s actively braking. Except it’s not a normal brake. It doesn’t squeal like it normally would while braking (it’s a 150A X-Car esc) and it makes a different sort of noise. At first I thought it was the receiver cutting out due to power brownouts, so I put a 220uf cap on the BEC from the ESC. Tested again, still threw me off. It’s very consistent and I can replicate every time.
So I’m not sure what it could be. It doesn’t sound like the ESC is braking, but it feels like it is. Sort of. I wondered if maybe it could be motor timing, but I don’t know anything about that so I don’t know where to start.
You could be hitting the ERPM limit of your ESC and it is braking to avoid damaging itself. What is the kv of your motor and how many cells is your battery? Although I have no idea what the ERPM limit of that ESC is though, you’ll have to check to see if you’re exceeding it
Yea, I’ll will definetly throw away that garbage rc ESC and pick up a FOCBOx on the upcoming sale. Im tired of things not working properly, should have gone the VESC route like everyone said, but I was too greedy…
@Clonkex and @TeslaAlex I have this same esc and I might know what’s wrong. This is just a theory but could you be drawing to much current and voltage sag is making you hit the low voltage? Although from the sound it doesn’t sound like it
@Clonkex@TeslaAlex I have know idea why it doesn’t work mine has worked perfectly since I got it although I don’t really do hard acceleration because I will fall off since my deck is so small
Have a FVT car esc on my board and when i accelerate hard it cuts off, breaks a little and just coasts for like one sec, after that i have full control again. Powering up a hill and pulling the trigger to accelerate has a similar effect, it just cuts off the power and sometimes puts me in its slow mode to protect itself. I ran a 260 kv motor, i have a 190 kv coming in the mail. It felt to me like the esc couldnt keep up with detecting the rotor position, and just freaked out and decided to cut power to slow down. Maybe i was using too much power, when accelerating and keeping my hand close to the esc it started blowing warm/hot air out of its heatsink. But the esc has always put me in limp mode after spirited riding up a hill, so i guess the issue isnt related to the power draw. Will let you know how a 190 kv works out, also will play with the setting and the software.
Second, I noticed that now that I’m using a 15mm belt and pulleys instead of the paltry 9mm, I get 0 belt slippage no matter how hard I accelerate or brake. Woo!
