{HEAD ~ Hammer bank velocity} during {TAIL ~ movement} through a print span is sensed, and further kinetic energy is supplied by the servo system as required to compensate for friction losses, braking effects during printing, and other causes of variation in hammer bank speed 
during
{ HEAD ~ Hammer bank velocity } during { TAIL ~ movement } through a print span is sensed , and further kinetic energy is supplied by the servo system as required to compensate for friction losses , braking effects during printing , and other causes of variation in hammer bank speed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH