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ADC throttle is accelerating th full throttle quickly

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Buddah
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Joined: 2019-08-26 20:52
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ADC throttle is accelerating th full throttle quickly

Hello, folks,

built my three-year-old daughter a little bicycle.

but I have a little problem with the throttle response and the acceleration.

I built an electronic e-bike throttle and connected it to the ADC1 input. I set Min Voltage (0,85V) and Max Voltage (2,55V). Center Voltage is set to 1.7V.

My problem is that despite the setting at about 25% the engine already accelerates at full throttle. if I open the throttle slowly and then keep it at 15%, the engine still accelerates further.

i see this on the duty display and also on the realtime data.

i have tried it but i can't figure out what i'm doing wrong. hope someone can help me, she si struggeling ab bit when full throttel hits so directly!! ;))

thank you in advance!!

Buddah

 

20190910_182240_0.jpg20190914_115543_020.jpg

Buddah
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Last seen: 1 year 6 months ago
Joined: 2019-08-26 20:52
Posts: 2

Hello, folks,

built my three-year-old daughter a little bicycle.

but I have a little problem with the throttle response and the acceleration.



I built an electronic e-bike throttle and connected it to the ADC1 input. I set Min Voltage (0,85V) and Max Voltage (2,55V). Center Voltage is set to 1.7V.

My problem is that despite the setting at about 25% the engine already accelerates at full throttle. if I open the throttle slowly and then keep it at 15%, the engine still accelerates further.



i see this on the duty display and also on the realtime data.

i have tried it but i can't figure out what i'm doing wrong. hope someone can help me, she si struggeling ab bit when full throttel hits so directly!! ;))

thank you in advance!!

Buddah

 

20190910_182240_0.jpg20190914_115543_020.jpg

wind waver
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Last seen: 1 week 1 day ago
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Joined: 2019-03-04 10:14
Posts: 5

I just found it. I use Vesc-tool and I haven't selected in ADC App -> General tab -> Duty Cycle. I just selected it in the Mapping tab.

now work like a charm

 

frank
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Joined: 2016-12-27 20:19
Posts: 819

You should use current control. And a second throttle for braking! If the cable brakes, the bike can go to full speed! Use a pulldown resistor next to the pins. 

https://www.vesc-project.com/node/1481

 

jimtzer
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Last seen: 10 months 1 week ago
Joined: 2021-04-26 15:35
Posts: 1

@frank I think you mean pull-down ;)

(the default connection of the ADC is to ground, i.e. 0)

https://eepower.com/resistor-guide/resistor-applications/pull-up-resisto...