So, I got a new ESC and motor because the previous powertrain was obviously cursed after the motor short (RIP my bank account). This has a minor issue that was present on the last setup as well, where it runs rough within a certain combination of low-to-mid throttle and mid RPM. It makes a buzzing sound and produces vibration I can feel in my feet during acceleration and braking, and can be made to run smooth again by adding throttle/brake. The higher the speed, the wider the throttle band that seems to be able to cause the vibration.
(You might need ear buds to hear the vibration noise over the wind noise)
Doesn’t seem to be connected to temperature, since the vibration behavior doesn’t seem to change between a cold start versus after some hard pulls. I also read on the vesc forum that rough running can be caused by an imprecise resistance measurement, so I manually adjusted the motor resistance up and down by 5% increments within a +/- 15% range in the FOC menu, and it didn’t change the behavior.
Are you positive is electronics related and not mechanical resonance? I’ve had very bizarre issues in drones due to motors/props/frame vibrating juuuuust right (and even creating a positive feedback loop with the electronics)
I guess that’s possible, but I don’t think it’s likely. It happens regardless of chain tension, and I’ve heard the motor Buzz at a higher frequency when it’s disconnected from the rear wheel once or twice. I can try putting a brace on the rear Fork to test this idea, though.
I installed this haphazard stiffener bar to resist chain tension, and it definitely seems to work. The vibration is less intense and takes place over a much smaller range of speeds now. The problem isn’t completely fixed, but TBH it’s good enough that I’m going to call it done. Thanks for the suggestion.
That looks like a cool little kit, but this system puts out 4000W instead of 1000W. I’m planning V2 to have a similar tail end power unit, but I’ll be able to get way more out of it with esk8 equipment.
Ok, maybe I was looking at a different version. I see there’s other varieties out there rated for 10-15kW peak.
That’s pretty good, it would be a great choice for a production board. But I can get much tighter packaging (shorter wheelbase) + custom suspension mounting (better use of internal deck volume) + my own choice of wheel (better tire selection / moto chain drive) + 30% weight reduction + 20kW continuous power and enough torque to fight God by building a custom swingarm and using a couple 3020 inrunners.
Looks like you might have some competition for best bike themed esk8 build
Although this version is basically the exact opposite of your build as to which parts of the skateboard are kept. also yours was much more involved to build
I’m pretty sure you’d win since his looks to be powered by boosted board parts and in the video I think his top speed was only 20mph. I don’t even need to look back at what you posted to know yours can go faster otherwise that 20s7p battery is being wasted
@Flyboy I have a set or 2 of these “all terrain “ tires, perhaps perfect for orbital? Diamond tipped wheels are the ultimate bling. Clean them, powder coat, boom unstoppable!
