硬盘磁悬浮驱动器制作
作者原文
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施工
The concept is that a permanent magnet is repelled by a rapidly spinning disc of conductive metal. The procedure is to open an old hard drive cover, exposing the platters inside but leaving the controller card connected.这个概念是一个永久磁铁是金属导电盘击退一个快速旋转。程序是打开一个旧的硬盘驱动器盖，露出里面的盘片，但留下的控制卡连接。
Take a scrap 5.25-inch hard disk, but one which still spins when you power it up (This may work with 3.5-inch drives, but the magnet tends to be attracted towards the motor shaft, so 5.25-inch drives allow the magnet to be further away).以一废弃5.25英寸硬盘，但仍然一旋转起来时，你的权力（这可能与3.5英寸硬盘，但往往被磁铁吸引对电机轴，所以5.25英寸的硬盘让磁铁进一步距离）。
Plug it into a PC power supply -- no computer or anything else!插入一个PC电源它 - 没有电脑或其它的东西， Just the power supply and the hard drive.只要电源和硬盘驱动器。 The drive will spin, at least for a few minutes.该驱动器将旋转，至少几分钟。
You may find that it spins down after a few seconds as it can't read any data from the disk (well you'd have trouble reading too if someone had ripped your head off!).您可能会发现它旋转下来后，从磁盘几秒钟，因为它不能读取任何数据（以及你有阅读困难太多，如果有人把你的头了！）。
Optional, but something to improve flying height: Remove the platters and spacers from the motor shaft, and re-assemble them so that all the platters are at the top of the shaft, with all the spacers at the bottom, giving a nice thick stack of aluminium.可选的，而是要提高飞行高度：删除盘片，从电机轴间隔，并重新组装它们，以便所有的盘片是在轴的顶部，所有在底部间隔，使一个好的厚厚一叠铝。
Tape a neodyminum magnet to the end of a strip of plastic or paper.磁带neodyminum磁铁一个塑料或纸一端。 The reson for using a strip, rather than, say, a string, is that the magnet tends to pull towards the centre and also tumble over - the strip constrains the magnet's movement to upwards only.这，振振有辞使用1条，而不是，比如说，一个字符串是磁铁往往拉向中心，也是摔下去-加沙地带限制了磁铁的运动，只有向上。 Fix the strip to one of the side holes of the drive chassis, so the magnet rests on the disc surface, near the outer edge, as shown below.固定驱动器底盘地带的一洞的一侧，所以磁铁在于光盘表面，靠近外缘，如下所示。
Operation手术
When the drive is powered up, the magnet levitates to about half an inch above the disc surface. Pressing the magnet down slows the disc rotation substantially.当驱动器通电后，磁体levitates约半英寸以上的光盘表面。压下来的磁铁旋转盘大幅减慢。 It might even cause your controller to detect a speed fault and stop the drive.它甚至可能会导致您的控制器故障检测的速度和停止驱动器。
The principle is that the magnet induces eddy currents in the platter.该原则是，在盘片磁诱导涡流。 Most driver platters are polished aluminum.多数司机是抛光铝盘。 Some new drives use ceramic platter, and they don't repel magnets much at all, since they are not conductive.一些新的驱动器使用的陶瓷盘，和他们不排斥在所有磁铁多，因为他们不导电。 The eddy currents carry their own magnetic field, which is in opposition to the permanent magnet.在履行自己的涡流磁场，而磁场是在反对永久性的。 These two fields repel each other, hence the levitation effect.这两个领域的相互排斥，因此悬浮效果。
It is really fun to see - you've got to build one!这真是有趣的发现 - 你要建立一个！
