描述
6EW1890-2AC
目前有一大部分步进电机驱动器还没有断电相位记忆功能，尤其是采用常见专用IC的步进驱动器，例如现在不属于芯片式的驱动，属于DSP分立式驱动，都不带相位记忆,也就是停止的时候刚好停止在他脉冲发完的相位上，因为电机停止的时候稍微一点惯性，就错开了记忆的那个点。用IC上电后复位脚的复位信号会将电机相位复位到初始值，上电的抖动应该是无法避免的。就算是用绝对值的伺服电机它也得判断和修正一下，也可以看成是抖动。或者严格来讲，不存在上电不抖动的电机。关键是这种抖动对你的应用影响有多大？最好是记录绝对停机坐标，上电后系统复位核对原点，再运行到断电前的绝对坐标恢复运行。
如果抖动对整体运行有较大的影响，建议可以考虑选用伺服电机。伺服电机带有Z相，可以停留绝对值或者寻找0点，避免上电抖动的情况。
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