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