The invention provides a device and method for determining whether an incrementing forcer has stepped the proper number of {HEAD ~ steps} required by {TAIL ~ command pulses} provided to the motor forcer 
required by
The invention provides a device and method for determining whether an incrementing forcer has stepped the proper number of { HEAD ~ steps } required by { TAIL ~ command pulses } provided to the motor forcer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH