It is evident that operation of the motor drives {HEAD ~ the weight carriage} in {TAIL ~ a desired direction} along the beam to vary the load imposed by the machine 
It is evident that operation of the motor drives { HEAD ~ the weight carriage } in { TAIL ~ a desired direction } along the beam to vary the load imposed by the machine
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH