Kepler wrote:Having some problems getting the PAS up and running with my RC friction drive setup. Basically everything works fine with the hall throttle but I can't get the PAS input to start the motor.
Setting wise I have the following.
SETUP PAS SENSOR
< 5P D (arrow up). P (arrow up)
Hey Kepler, this is where the preview screen here will be super useful. As you turn the pedals, do you see the arrow after the 'P' signal toggle between an up and a down arrow? This is an indicator of whether the CA sees what it thinks is a logic '0' or logic '1' on the input. I would have thought that 1V is low enough to trigger a logic '0' threshold, but if it's not consistent you could probably put a resistor to Gnd to help pull this voltage down further.
The up arrow after the 'D' means that you need to set the PAS-> Dir Plrty to be "5V = Fwd". Otherwise if you have it at "5V=Rev" it thinks that you are pedaling backwards when the direction pin is at 5V.
Let me know if that sorts it. With the direction polarity set correctly and the PAS input toggling you should be able to see your pedal RPM on the 3rd display screen and the PAS assist modes should work fine too. The default values for the Strt and Stop delay times are good for an 8 pole sensor, but for a 5 pole sensor you might want to increase them about 50% otherwise it will likely cutout when you are pedaling at a slowish cadence.
Now that I think about it, make sure you don't have a linear voltage PAS pickup that tries to emulate a 1-4V throttle signal rather than giving a pulse for each magnet passing. If so it's all but useless. I recall some of the early Crystalyte PAS sensors were like this which was necessary to interface with their old analog controllers.
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