pedal assist drops out on ezee motor with cycle analyst

[wardjewell]

I have searched the forum and outside the forum for anything on this and have not found it.

I put an ezee motor on my wife's recumbent trike in 2018. It has the C3625-EZ controller, V3 cycle analyst, and PAS-12P pedal assist sensor.

When using pedal assist, the motor loses power briefly every second rotation of the crank - every 720 degrees. She can feel the loss and I can hear it. In setup mode, the CA indicates (with the p/d arrows) 12 steps per revolution. I tested it for several revolutions, several times. When it is operating, the PAS indicator on the CA shows that the signal is lost every 2 revolutions of the pedals.

I checked all the settings, and they have not been changed in at least 2 years. This is a new problem. The motor works normally with the throttle.

I installed a new magnet ring but not a new sensor. I have the sensor and can install it but it does not make sense that it only misses every 24th pole on a 12 pole sensor. I used a gaussmeter to check all the magnets, old and new, and they are all in the 3.0 kgauss range.

I upgraded the firmware from 3.11 to 3.14 but the problem is still there.

I am really lost on this one. Any suggestions anyone has are most welcome. Thanks for your help.

 

[E-HP]

If you're willing to experiment, and since you have an extra disk, you could try popping out every other magnet, and see if it takes 4 revolutions instead of 2. That might help let you know if there's a sensor issue, or something with the CA.

 

[wardjewell]

If you're willing to experiment, and since you have an extra disk, you could try popping out every other magnet, and see if it takes 4 revolutions instead of 2. That might help let you know if there's a sensor issue, or something with the CA.

Thanks for the suggestion!