I don't understand the way the power curve is set up on the BBSHD PAS control - doesn't seem to make sense. It appears to source roughly the same current regardless of pedaling cadence. this resulted in a minimum power level of about 5/8HP in PAS1, which resulted in a minimum cruising speed of about 18-20MPH. No good.
Stock programming (Luna) has PAS1 limit current set to 10%, but it's producing WAY more than 10% of the available power at that setting, and the power remains fairly constant no matter how fast I pedal, so I don't know what it is supposed to be doing.
I am trying to achieve what I think makes sense - I'd like a given PAS level to source some amount of current until I achieve a given pedaling cadence (60-90 range) then ramp down quickly to some low level. I'd assume the increasing PAS setting would correspond to increasing initial current levels. I hope this makes sense - I attached a graph: my pedaling cadence would then servo to roughly the same RPM, and gear and PAS level would determine my road speed. As resistance increases and cadence begins to drop (like when you hit an incline), power will increase to maintain roughly the same road speed at only a slightly lower cadence - vice versa for declines.
I read Karl's programming article, but don't understand the descriptions of the two PAS settings: Limit Current (%) = power cut vs road speed (??). Limit Spd (%) = power cut vs motor speed. Motor speed corresponds to cadence, so I get that one, but road speed? What is the limit? I get power as fast as I can go (42.1MPH is my current record).
Evidently, there is a motor speed (cadence) ramp-down setting called Current Decay - anybody know what the power vs cadence curve looks like for different settings? I reduced to 4 from 8, but now I'm thinking I might be running above the cut all the time - my cadence is typically ~80-90. I also reduced the Keep Current % down to 25 from 60. This ended up reducing the PAS1 power to about 200-250W, which at least allowed me to ride as slow as 15MPH, but I still didn't seem to see any appreciable variation in power based on cadence.
Can anyone shed some light on what these settings are supposed to do, and how they might interact?
Stock programming (Luna) has PAS1 limit current set to 10%, but it's producing WAY more than 10% of the available power at that setting, and the power remains fairly constant no matter how fast I pedal, so I don't know what it is supposed to be doing.
I am trying to achieve what I think makes sense - I'd like a given PAS level to source some amount of current until I achieve a given pedaling cadence (60-90 range) then ramp down quickly to some low level. I'd assume the increasing PAS setting would correspond to increasing initial current levels. I hope this makes sense - I attached a graph: my pedaling cadence would then servo to roughly the same RPM, and gear and PAS level would determine my road speed. As resistance increases and cadence begins to drop (like when you hit an incline), power will increase to maintain roughly the same road speed at only a slightly lower cadence - vice versa for declines.
I read Karl's programming article, but don't understand the descriptions of the two PAS settings: Limit Current (%) = power cut vs road speed (??). Limit Spd (%) = power cut vs motor speed. Motor speed corresponds to cadence, so I get that one, but road speed? What is the limit? I get power as fast as I can go (42.1MPH is my current record).
Evidently, there is a motor speed (cadence) ramp-down setting called Current Decay - anybody know what the power vs cadence curve looks like for different settings? I reduced to 4 from 8, but now I'm thinking I might be running above the cut all the time - my cadence is typically ~80-90. I also reduced the Keep Current % down to 25 from 60. This ended up reducing the PAS1 power to about 200-250W, which at least allowed me to ride as slow as 15MPH, but I still didn't seem to see any appreciable variation in power based on cadence.
Can anyone shed some light on what these settings are supposed to do, and how they might interact?
