Speed measurement with encoder

reza hakimi_20486

Hello

I used the example of the software itself to measure the speed of a motor with IC 28335

 

But the results of the practical test were as follows?

What is the reason for this problem?

Rhonda_20369

Hi, Reza,

Please check your practical test setup. Does your motor run in a steady speed?

What are the waveforms of A and B from your encoder? 

Do those signals have the same waveform (frequency, shape, and phase) as the simulation result?