Hi, We're having an issue where with variable speed (should be fixed) . The drive is driven by a 55 timer and the PWM input looks identical even when the motor is driving at different speeds. The motor tends to operate correctly most of the time, but around 25% of the time drives in a slow mode with no obvious pattern to its occurance. This problem exists over two different boards / motors with the same setup. The output to the motor is visible different (top photo is when operating as expected, and bottom when operating slower.) Blue trace is U, yellow is ahll sensor for U i believe. I would appreciate if anyone has any thoughts on the traces to indicate what may be going on?
Many Thanks
Richard