近几年 ,各磷肥厂相继使用微机自动控制计量装置 ,使包装质量提高。但因使用的包装机是机械式螺旋包装设备 ,工作中存在的问题较多 ,主要为 :( 1 )　电动机动力直接传递给包装机螺旋 ,机械振动较大 ,影响微机自动计量精度 ,袋重易偏离标准值 ,包装质量难以保证。( 2 )　卡机频 In recent years, the phosphate fertilizer plants have used microcomputer automatic control metering device, so that packaging quality. However, due to the use of the packaging machine is a mechanical screw packaging equipment, there are more problems in the work, mainly :( 1) motor power directly to the packaging machine spiral, mechanical vibration, affecting the computer automatically measuring accuracy, Deviate from the standard value, packaging quality is difficult to guarantee. (2) card machine frequency