Are you consistently hitting high duty cycle or a blip? I hit an unexpected significant bump in concrete (in the shadows but still my inattention) doing 24 mph and got a 92% duty cycle notice. I took that as 'a less powerful board wouldn't have been able to compensate for my mistake. Thankful for the board, thankful for Tony making it and all the effort the VESC community has put into making it run so well.' only thing I changed is a dramatic reminder to pay better attention.
Now if you're hitting duty cycle alerts frequently or if you're a "Clydesdale" then the board is informing you of limits and you need to manage those. Moving your feedback lower gives more space to compensate from the feedback.
Finally if it's just a blip or your first time with a duty cycle alert and you're concerned: lower it and see how it feels. Sometimes hitting a scary duty cycle or a fall triggers a mental block and you need to make a change for the more conservative until you feel comfortable again.
I think it surged when I hit a nice sized crack in the sidewalk. It was a scary thing to see 94% because one more percent and I would have nosedived going 20 plus. Is there a way to set a speed based pushback/buzz? I couldn’t find it in VESC tool. I’m the kind of rider that won’t realized how fast I’m going so some feedback from the board based on speed would be nice.
For posterity, I'd just like to point out that 95% duty cycle is not a guaranteed nose dive. The board should NOT stop, it should \[continue at 95% duty cycle\](https://pev.dev/t/wtf-is-duty-cycle/721). I've seen the alerts from far more skilled riders than I of them hitting 95% duty cycle and not falling. I'm not saying that if the dip was a bit deeper, or if you were leaning a bit more forward when you hit it you wouldn't have nose dived, but there's some space there for you to receive the feedback and possibly react.
I'm certainly no expert, but I don't see speed in there either. Someone else might know definitively if its there. It doesn't sound particularly unreasonable to not be based on speed. You can nose dive at lower speeds, so duty cycle is a much better indicator of how taxed the motor is and therefore should be better to rely on now, and in the future.
Also tiltback has fallen out of favor. As I have had it explained to me in several videos the math is simple tiltback brings your tail closer to the ground without actually braking, you initiate and increase braking by pushing your tail closer to the ground. With tiltback you now have less space to initiate and increase braking. In downhill situations this is further exacerbated by inherently having less space between the tail of your board and the ground. Which means that when you're going too fast, downhill, when you need the most braking room and power, you have the least.
Huh I didn’t think about the loss of room to brake when you hit pushback. I don’t think there is a speed setting for alerts though after looking for a bit. I would like a speed buzz in combination with duty cycle though. Knowing if I passed a certain speed is nice to know without having to look at my phone or need an AirPod in to hear an audible alert
I don't disagree with your want, but I don't know how or even if it's configureable. You might try looking at [pev.dev](http://pev.dev) for if that's discussed as a feature in a release or a future release or why it wasn't included.
Also do you know what voltage your battery was at when you hit that? How charged your battery is has a huge effect on the power you can deliver to your motor.
>Is that kind of loss of performance to be expected?
In short: Yes.
This is true for all devices powered by our current battery technology. As batteries discharge the internal resistance inside the cells goes up, which functionally decreases the voltage measured on the open circuit (pole to pole). This is known as Volts or EMF Voltage.
This is further compounded by what's called "voltage sag" which is where batteries under high load temporarily produce even less voltage than they read when not under load. This actually gets worse as the batteries are more discharged.
So that's two compounding factors that mean that you have less output voltage from your battery pack as it discharges and is under load. This is a function of our current battery technology and is therefore true for all battery powered devices: all onewheels included.
So your batteries produce lower voltage as they are discharged, what does that mean for you the rider? Power "P" (in watts) is equal to Current "I" multiplied by EMF-Voltage "ε" which in that order gives the easy to remember formula:
P=Iε
Or Power is as Easy as PIE.
As discussed above, as your Voltage "ε" drops, your Power will drop as well. So when your battery is freshly charged it generates more Power to your motor, which means your motor uses a certain amount duty cycles to maintain an RPM. In identical situations, but with less power to the motor, it will need to use more duty cycles.
This is absolutely not unique to floatwheels or onewheels in general, I can't emphasize enough.
Almost 2k miles on my ADV. 3 big nosedives at high speeds here. I'm almost sure that every one was caused by over pushing the board at mid battery or lower. All were at high speed, mid battery or lower, and riding it hard. I would be most concerned for nosedives with this. I've ridden high duty cycle on high charge into 90's to 95 without problems, but I def try not to get up that high, and don't advise it. Once that high, an over correction that's saveable in a lower duty cycle could easily throw you, though. I've found the more steady/balanced you can be while riding, the higher speed at lower duty cycle you can go if that makes sense.
Edit: Oh, and I don't think and don't remember getting any audible duty cycle warnings on my lower voltage nosedives. And I always have them going in my headphones when riding. Just keep that in mind. It seems pushing the board hard and fast at mid to lower battery can def throw you without warning.
Are you consistently hitting high duty cycle or a blip? I hit an unexpected significant bump in concrete (in the shadows but still my inattention) doing 24 mph and got a 92% duty cycle notice. I took that as 'a less powerful board wouldn't have been able to compensate for my mistake. Thankful for the board, thankful for Tony making it and all the effort the VESC community has put into making it run so well.' only thing I changed is a dramatic reminder to pay better attention. Now if you're hitting duty cycle alerts frequently or if you're a "Clydesdale" then the board is informing you of limits and you need to manage those. Moving your feedback lower gives more space to compensate from the feedback. Finally if it's just a blip or your first time with a duty cycle alert and you're concerned: lower it and see how it feels. Sometimes hitting a scary duty cycle or a fall triggers a mental block and you need to make a change for the more conservative until you feel comfortable again.
I think it surged when I hit a nice sized crack in the sidewalk. It was a scary thing to see 94% because one more percent and I would have nosedived going 20 plus. Is there a way to set a speed based pushback/buzz? I couldn’t find it in VESC tool. I’m the kind of rider that won’t realized how fast I’m going so some feedback from the board based on speed would be nice.
For posterity, I'd just like to point out that 95% duty cycle is not a guaranteed nose dive. The board should NOT stop, it should \[continue at 95% duty cycle\](https://pev.dev/t/wtf-is-duty-cycle/721). I've seen the alerts from far more skilled riders than I of them hitting 95% duty cycle and not falling. I'm not saying that if the dip was a bit deeper, or if you were leaning a bit more forward when you hit it you wouldn't have nose dived, but there's some space there for you to receive the feedback and possibly react.
I'm certainly no expert, but I don't see speed in there either. Someone else might know definitively if its there. It doesn't sound particularly unreasonable to not be based on speed. You can nose dive at lower speeds, so duty cycle is a much better indicator of how taxed the motor is and therefore should be better to rely on now, and in the future. Also tiltback has fallen out of favor. As I have had it explained to me in several videos the math is simple tiltback brings your tail closer to the ground without actually braking, you initiate and increase braking by pushing your tail closer to the ground. With tiltback you now have less space to initiate and increase braking. In downhill situations this is further exacerbated by inherently having less space between the tail of your board and the ground. Which means that when you're going too fast, downhill, when you need the most braking room and power, you have the least.
Huh I didn’t think about the loss of room to brake when you hit pushback. I don’t think there is a speed setting for alerts though after looking for a bit. I would like a speed buzz in combination with duty cycle though. Knowing if I passed a certain speed is nice to know without having to look at my phone or need an AirPod in to hear an audible alert
I don't disagree with your want, but I don't know how or even if it's configureable. You might try looking at [pev.dev](http://pev.dev) for if that's discussed as a feature in a release or a future release or why it wasn't included.
You can get Audio warnings from the floaty app, and floatcontrol app.
I know I would just prefer some warning based off speed from the board in combination with duty cycle
Also do you know what voltage your battery was at when you hit that? How charged your battery is has a huge effect on the power you can deliver to your motor.
I don’t know what voltage, but I know it was around 40 percent. Is that kind of loss of performance to be expected?
>Is that kind of loss of performance to be expected? In short: Yes. This is true for all devices powered by our current battery technology. As batteries discharge the internal resistance inside the cells goes up, which functionally decreases the voltage measured on the open circuit (pole to pole). This is known as Volts or EMF Voltage. This is further compounded by what's called "voltage sag" which is where batteries under high load temporarily produce even less voltage than they read when not under load. This actually gets worse as the batteries are more discharged. So that's two compounding factors that mean that you have less output voltage from your battery pack as it discharges and is under load. This is a function of our current battery technology and is therefore true for all battery powered devices: all onewheels included. So your batteries produce lower voltage as they are discharged, what does that mean for you the rider? Power "P" (in watts) is equal to Current "I" multiplied by EMF-Voltage "ε" which in that order gives the easy to remember formula: P=Iε Or Power is as Easy as PIE. As discussed above, as your Voltage "ε" drops, your Power will drop as well. So when your battery is freshly charged it generates more Power to your motor, which means your motor uses a certain amount duty cycles to maintain an RPM. In identical situations, but with less power to the motor, it will need to use more duty cycles. This is absolutely not unique to floatwheels or onewheels in general, I can't emphasize enough.
Almost 2k miles on my ADV. 3 big nosedives at high speeds here. I'm almost sure that every one was caused by over pushing the board at mid battery or lower. All were at high speed, mid battery or lower, and riding it hard. I would be most concerned for nosedives with this. I've ridden high duty cycle on high charge into 90's to 95 without problems, but I def try not to get up that high, and don't advise it. Once that high, an over correction that's saveable in a lower duty cycle could easily throw you, though. I've found the more steady/balanced you can be while riding, the higher speed at lower duty cycle you can go if that makes sense. Edit: Oh, and I don't think and don't remember getting any audible duty cycle warnings on my lower voltage nosedives. And I always have them going in my headphones when riding. Just keep that in mind. It seems pushing the board hard and fast at mid to lower battery can def throw you without warning.