To determine the position of ink jet head 30 while driving motor 15, {HEAD ~ printing operations processor} 200 also counts {TAIL ~ the drive pulses} 
To determine the position of ink jet head 30 while driving motor 15 , { HEAD ~ printing operations processor } 200 also counts { TAIL ~ the drive pulses }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL