The flux sensors generate signals to indicate step movement and {TAIL ~ direction}, and a digital comparator compares the contents of an up/down counter with the contents of {HEAD ~ a step command counter} 
The flux sensors generate signals to indicate step movement and { TAIL ~ direction } , and a digital comparator compares the contents of an up / down counter with the contents of { HEAD ~ a step command counter }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD