72V: Kelly Motor Calibration

Kelly motor calibration identifies how the controller drives the motor. Prepare the bike securely, follow the documented sequence, and verify the completed identification state before riding or tuning.

Controller Diagnostics

Safe Diagnostic Setup

Before performing any calibration or testing:

• lift the rear wheel at least 6 inches off the ground
• remove the pedal chain to prevent drivetrain movement
• ensure the bike is stable and cannot move
• keep hands and tools clear of the motor
• do not connect or disconnect components while powered
• do not run calibration with load on the wheel

During calibration:

• the motor can spin unexpectedly or reach high speed
• treat the system as live and uncontrolled

Normal controller state:

• green LED = steady ON
• red LED = OFF

If faults are present, the red LED will flash codes on startup.

Motor Calibration

Verification:

• confirm Motor Identify EN returns to 85 (required)
• if the value remains at 170, calibration did not execute

If the value does not return to 85, calibration did not complete successfully.

Calibration Behavior and Failure

During calibration:

• motor may spin or jerk unpredictably
• rapid acceleration or full-speed spin can occur
• do not apply throttle during calibration
• this is normal behavior

If calibration fails or behaves incorrectly:

• motor stutters or fails to rotate
• controller returns errors
• value does not return to 85

Check:

• hall sensor wiring
• phase wiring
• battery voltage
• throttle connection
• motor connection

Bad calibration results in:

• weak acceleration
• excessive heat
• noise or rough operation
• poor efficiency

Calibration is not optional. Incorrect identification directly affects performance.

Hall Sensor Quick Test

Signals toggle between:

0V ↔ 5V

If signals do not toggle:

• hall sensor or wiring is faulty
• controller cannot determine motor position