For position control, how far cylinder travel deponds on setpoint you provided. The spool in a8 _, s$ X8 p) Q
servo valve will open for a while and won't close until its error signal is cancelled out. For * ~) \" S8 u& P! tspeed control, the opening of spool in a servo valve will be certain as required speed of a cylnder.3 y( Y( A* u. a% u" c
. T6 |- y/ }( P. x$ Y$ U
[ 本帖最后由 frankljh 于 2006-11-16 03:35 编辑 ]