A control system for controlling rotation of {HEAD ~ a servomotor} to vertically move {TAIL ~ a load} supported by a flexible support device, the control system comprising: 
A control system for controlling rotation of { HEAD ~ a servomotor } to vertically move { TAIL ~ a load } supported by a flexible support device , the control system comprising :
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH