Apply vector to control AC servo motor, it has wide speed-adjust range, high precision, fast dynamic response, and high reli JF180 (Series) Drum Rolling TesterStandards:GB 18352.2-2001GB /T12536-1990GB /T12537-1990GB /T12543-1990GB /T12544-1990GB /T12545-1990GB /T12547-1990GB /T12548-1990Characters:(1) Apply vector to control AC servo motor, it has wide speed-adjust range, high precision, fast ...