control means for supplying to {HEAD ~ the servomotor}, based on {TAIL ~ the load signal} and a control algorithm, a servomotor drive signal specifying servomotor operating parameters, including a rotational direction and a velocity, sufficient to cause the servomotor to impart to the load via the support device a desired elevating velocity within a desired amount of time 
based on
control means for supplying to { HEAD ~ the servomotor } , based on { TAIL ~ the load signal } and a control algorithm , a servomotor drive signal specifying servomotor operating parameters , including a rotational direction and a velocity , sufficient to cause the servomotor to impart to the load via the support device a desired elevating velocity within a desired amount of time
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH