It seems pretty hard to find good and reliable information about of to fine tune a throttle on a Fardriver controller. I am new to this but spent quitte a few hours searching for information online, I used the GPT plugging (that is somewhat inaccurate) , and spent time in my driveway in the hope to get good throttle control. My build is meant to be used to technical enduro riding and having a very smooth power delivery from dead stopped but also being able to get powerful burst of power to pop the front wheel is crucial, hence this topic and the deep research around this. If ebike had a clutch it wouldn't that important, but they don't. Here is what I foudn so far, what I am wondering about also. Please share your knowledge, experience and hopefully we can make a good thread on how to fine tune a throttle with a Fardriver controller.
There are 3 throttle modes, Eco, Line and Sport.
That setting is supposed to change the throttle curve. Eco has a progressive curve (less power at low throttle input and ramps up as you twist it more), Line has a linear (straight) curve, Sport has more of a logarithmic type of curve (a lot of power at low throttle opening and then it tapers off).
Throttle Acc and Dec step.
This setting goes from 64 to 224 if I remember correctly, the higher the number the less delay between the throttle input and the motor reaction. Acc is to adjust the acceleration delay, while Dec is to adjust the deceleration delay. Regarding Dec, the negative of low numbers is that when you chop the throttle, the bike will keep on going instead of stopping its acceleration instantaneously. Overall (for both Acc and Dec), lower numbers will smooth out your ride as it will slow down the motor response which will help to cancel out micro jerks on the throttle.
ECOAccCoeff, can be set from 0 to 8.
This one is supposed to change the progressiveness of the throttle when using Eco mode. What I found out is that it has an influence on every throttle mode. I want to see how Eco was feeling and how Coeff was influencing it. I played with it but figured that none of the setting were satisfying for my use. I then switched to Line and Sport throttle modes but didn't put Coeff back to 8 or 0. This resulted in a very sluggish bike at take off. Even in the 31Kw mode it would be very hard to lift the front wheel from a stop to do a pivot turn. I tried many setting until I remembered that I played with ECOAccCoeff. Once I put it to 8 the bike was working as expected in Line and Sport. For those that suffer from sluggish throttle in Line or Sport, this might be the problem if you played with this setting.
Throttle low and high Voltage
This depends mostly on your specific throttle but the auto-learn process with give you some low and high voltage values. This can result in a lot of dead throttle range at the start or at the end of the twisting range. For my specific throttle the controller started with 1.1V as a low value. After incremental changes I settled at 0.85V which gives me a little bit of free play but much less that the original value. If I drop it to 0.8V the bikes makes some noises which means the motor barely wants to start even without touching the throttle so you know that you need to up your low voltage value at least a little bit to the bike has 0 input when the throttle is released.
Release throttle
Not sure what it does yet. I haven't experimented with it, if somebody has some info/experience with this one it would be useful. If I experiment with it I will share my results here.
PC13 (can be found in the Function section)
This is setup as "0-NormalResponse" by default, it can be put in "1-RaceMode". I have seen some saying it helps with throttle response, some saying it doesn't do anything. Generally speaking, very hard to find any information on this setting. I have also seen some people saying it can allow regen to kick in as soon as you back-off the throttle instead of when the throttle is fully closed. So far I haven't been able to establish what it does exactly, neither from a technical perspective, nor in terms or ride feel. If someone knows, feel free to comment.
LQ
I saw a video on YT saying that adjusting LQ value changes how your torque curve is applied. Again, very hard to find any details or information about this setting. In the YT video it says that lower numbers means you will get all your torque at the start, and high number would yield low torque at the start and a ramp up much later.
So far, I have settled with Line mode, 224step for both Acc and Dec, ECO Coeff at 8. I haven't touched PC13 and LQ. I am still recovering from a knee surgery so I can only play around in the courtyard (actually I am not allowed that either lol). This setup seems to offer very good start/low speed control at low throttle opening, while allowing strong bursts of power for enduro techniques. I will need to get in the dirt to see if it is easy to manage wheel spin and how it behaves at higher speeds.
There are 3 throttle modes, Eco, Line and Sport.
That setting is supposed to change the throttle curve. Eco has a progressive curve (less power at low throttle input and ramps up as you twist it more), Line has a linear (straight) curve, Sport has more of a logarithmic type of curve (a lot of power at low throttle opening and then it tapers off).
Throttle Acc and Dec step.
This setting goes from 64 to 224 if I remember correctly, the higher the number the less delay between the throttle input and the motor reaction. Acc is to adjust the acceleration delay, while Dec is to adjust the deceleration delay. Regarding Dec, the negative of low numbers is that when you chop the throttle, the bike will keep on going instead of stopping its acceleration instantaneously. Overall (for both Acc and Dec), lower numbers will smooth out your ride as it will slow down the motor response which will help to cancel out micro jerks on the throttle.
ECOAccCoeff, can be set from 0 to 8.
This one is supposed to change the progressiveness of the throttle when using Eco mode. What I found out is that it has an influence on every throttle mode. I want to see how Eco was feeling and how Coeff was influencing it. I played with it but figured that none of the setting were satisfying for my use. I then switched to Line and Sport throttle modes but didn't put Coeff back to 8 or 0. This resulted in a very sluggish bike at take off. Even in the 31Kw mode it would be very hard to lift the front wheel from a stop to do a pivot turn. I tried many setting until I remembered that I played with ECOAccCoeff. Once I put it to 8 the bike was working as expected in Line and Sport. For those that suffer from sluggish throttle in Line or Sport, this might be the problem if you played with this setting.
Throttle low and high Voltage
This depends mostly on your specific throttle but the auto-learn process with give you some low and high voltage values. This can result in a lot of dead throttle range at the start or at the end of the twisting range. For my specific throttle the controller started with 1.1V as a low value. After incremental changes I settled at 0.85V which gives me a little bit of free play but much less that the original value. If I drop it to 0.8V the bikes makes some noises which means the motor barely wants to start even without touching the throttle so you know that you need to up your low voltage value at least a little bit to the bike has 0 input when the throttle is released.
Release throttle
Not sure what it does yet. I haven't experimented with it, if somebody has some info/experience with this one it would be useful. If I experiment with it I will share my results here.
PC13 (can be found in the Function section)
This is setup as "0-NormalResponse" by default, it can be put in "1-RaceMode". I have seen some saying it helps with throttle response, some saying it doesn't do anything. Generally speaking, very hard to find any information on this setting. I have also seen some people saying it can allow regen to kick in as soon as you back-off the throttle instead of when the throttle is fully closed. So far I haven't been able to establish what it does exactly, neither from a technical perspective, nor in terms or ride feel. If someone knows, feel free to comment.
LQ
I saw a video on YT saying that adjusting LQ value changes how your torque curve is applied. Again, very hard to find any details or information about this setting. In the YT video it says that lower numbers means you will get all your torque at the start, and high number would yield low torque at the start and a ramp up much later.
So far, I have settled with Line mode, 224step for both Acc and Dec, ECO Coeff at 8. I haven't touched PC13 and LQ. I am still recovering from a knee surgery so I can only play around in the courtyard (actually I am not allowed that either lol). This setup seems to offer very good start/low speed control at low throttle opening, while allowing strong bursts of power for enduro techniques. I will need to get in the dirt to see if it is easy to manage wheel spin and how it behaves at higher speeds.
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