学生进行数控维修项目训练时难点在于PLC梯形图的设计,在教师教学过程中通过梯形图设计过程中的模仿法、补全法、经验法、分块法的反复练习,促使学生PLC梯形图设计正确思维的确立、强化和升华,建立PLC梯形图设计的思维模式,培养学生熟练进行PLC梯形图设计能力。 Students difficult for CNC training project training lies in the design of PLC ladder diagram, in the process of teaching teachers through the imitation of the ladder design process, make up the law, the experience of law, the practice of sub-block method to promote student PLC ladder diagram design The correct thinking of the establishment, strengthening and sublimation, the establishment of PLC ladder design thinking mode, training students proficiency PLC ladder design capabilities.