本研究目的是開發一種光學式混濁度量測系統。為了使放電加工機台得到更良好的加工品質,因應環境因素的變動,控制器必須能即時調整製程參數。放電加工液體混濁度是放電加工過程中的一項重要參數,藉由監測放電加工油的混濁度,利用量測系統所量測到的混濁度,判斷是否要改變放電加工油的噴流速度,減少積碳與加工屑停留在加工面上,使加工環境保持在最佳加工濃度,藉此提高放電加工(EDM)的加工精度和壽命。;The purpose of this study is to develop an optical turbidity measured system. The concentration of EDM neutral oil is an important parameter in the EDM. According to measuring the turbidity of EDM neutral oil changing the velocity of jet flow and we can reduce the carbon deposition to stay on the processing surface, so that the processing environment to maintain the best processing concentration. To improve the machining precision and life of EDM.