After removing a lot of delays, i have still been unable to fix the PWM output. It is getting interrupted by something. The problem could be anywhere. I modified the AFMotor library to use analog pins with the motor shield. The only other wires to the shield are PWM pin 5 and 5v + GND. LCD Keypad …

AFMotor shield - PWM strangely getting interrupted by sketch code - #6 by system - General Guidance

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