That is a good question.. I am not sure what that is there for any way. The direction pulse is sort of a misnomer. The direction pulse doesn't really pulse, it just goes high for forward and low for reverse. I suppose if you were going back and forth 2 stepper pulses on the step then you might need to add some time but that would be a very rare instance. I wonder if it has something to do with macx nc mode or something..
Brian??
Chad