{HEAD ~ Precise control} of the current during linear motion of the reciprocating mechanism is not necessary during {TAIL ~ reversal} due to the nature of the servo system which saturates during most of the rebound interval 
is not necessary during
{ HEAD ~ Precise control } of the current during linear motion of the reciprocating mechanism is not necessary during { TAIL ~ reversal } due to the nature of the servo system which saturates during most of the rebound interval
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH