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众所周知,七圈法即莫尔条纹错位法,刻制元光栅采用此方法可以减少零点闭合误差,提高元件的精确度,而且可以在普通刻机上进行刻制。我所使用七圈法,是在TKF 500刻机和TFF 1000刻机上,分别刻制了2700条线/周,和5400条线/周以上的普通光栅(如每周2700 5400 10800 16200 21600 32400等等)。下面仅举两个实例供有关单位参考。例一我们在刻速率转台光栅时,第一块发现有零点闭合误差存在,第二块改用七圈法刻制,消除了零点闭合误差。刻第三块时将机床重新调正,减小了轴系间隙,用一圈法
As we all know, seven circle method that Moiré fringe dislocation method, carved yuan grating using this method can reduce the zero point closing error, improve the accuracy of components, and can be carved on a common engraving machine. I used the seven-lap method on the TKF 500 engraving machine and the TFF 1000 engraving machine, engraving 2700 lines / week, and 5400 lines / week ordinary grating (such as weekly 2700 5400 10800 16200 21600 32400, etc. Wait). Here are just two examples for the relevant units for reference. Example 1 When we engraved the turntable raster, the first block found a zero-point closing error. The second block was switched to seven-circle method, eliminating the zero-point closing error. Engraving the third block when the machine re-adjusted, reducing the shaft system clearance, with a circle method