清华园街道PEEIMOGER微型电机M-51K60N-CFB精于型

步进电机属于精密器件，机械加工精度较高。例如：磁阻式步进电机的单边气隙只有0.03～O 08mm，永磁步进电机的磁钢性能也要求很高，一旦退磁后，必须重新充磁。步进电机常见的故障有下列三种：
　　1、步进电机温升过高
　　下列几种情况将使步进电机温升过高：
　　(1)环境温度过高，散热条件差，安装接触面积不符合标准;
　　(2)工作方式不符合技术要求，如三相六拍工作的电机改为双三拍工作，温升要变高;
　　(3)驱动电路发生故障，电动机长期工作在单一高电压下或长期工作在高频状态，同样要使电动机的温升变高。
　　(4)高、低压供电的驱动电路在高频工作时，高压脉宽不能太宽，应按技术标准调整，否则温升也会高;

清华园街道PEEIMOGER微型电机M-51K60N-CFB精于型

切削速度:钻削铸铁类时，切削速度v=2m/min左右。钻削钢材类时，切削速度v=1m/min左右。换算成机床转速，可根据钻精孔直径和相应材料的切削速度确定。N=1V/。进给量:尽量采用机动走刀f=.1mm/r左右。但直径小于5mm的小钻头，因强度弱，只能用手动进给。冷却润滑液：因钻精孔系精加工，其精度和表面粗糙度都较高，并且切削负荷小，故应选择以润滑为主的冷却润滑液。采用1%～2%的乳化油水溶液。

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清华园街道PEEIMOGER微型电机M-51K60N-CFB精于型

清华园街道PEEIMOGER微型电机M-51K60N-CFB精于型
卡尺是一种常用的量具，主要用于测量长度、内外径、阶梯深度等，常见的产品类型有高度尺、千分尺、百分表、千分表等。虽然卡尺的操作比较简单，但是在使用中也是要注意多种问题的。今天来具体介绍一下卡尺的使用注意事项和维护方法，希望可以帮助到大家。卡尺的使用注意事项1.游标卡尺是比较精密的测量工具，要轻拿轻放，不得碰撞或跌落地下。使用时不要用来测量粗糙的物体，以免损坏量爪，不用时应置于干燥地方防止锈蚀。测量时，应先拧松紧固螺钉，移动游标不能用力过猛。

清华园街道PEEIMOGER微型电机M-51K60N-CFB精于型


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