Yes. It's a fast machine that runs with a stable clock up to 65kHz. There may appear to be some pulses missing in these traces, but this is because the width of the pulses is close to the sampling rate at this timebase, so the scope is not catching all of them. Sampling at higher rates shows a certain amount of jitter between pulses, but an average pulse rate that matches the desired feed rate.
What concerns me is the asymmetric profile of one channel of the stepper drive. I was expecting to see two phase shifted sinusoids, but the B channel appears to collapse each time it crosses the peak and at this point you can hear the stepper jump several steps. I am guessing that the motor lets go as the current falls sharply and gets pulled towards the next whole step.
Not sure if this might be due to a wiring issue in the stepper, or a driver fault?
I have checked my wiring against the manuals for the steppers and the drivers and all appears to be correct, but I have found at least one error in the driver docs so anything could be happening.
Terry