Analysis of the Martindale method-Li Sharu chart

1. Definition:
Graph formed by changing movements. From a circle to a gradually narrowing ellipse, until it becomes a straight line, then from the straight line to a widened
circle to a circle, repeating this movement diagonally, the resulting curve is as shown in the figure below image:

Second, the test verifies the accuracy of the Lissajous curve:
1. Remove the material from the grinding table, use plain white paper with a diameter of (100 ± 5) mm and a minimum mass of 100 g / m2 on the surface of the grinding table, and fix it to ensure that the surface is smooth.
2. Insert a stainless steel sleeve with the same diameter as the sample pen shaft into the sample guide plate shaft sleeve and install a ballpoint pen. Touch the tip of the pen to the surface of the paper.
3. Turn on the instrument and measurek the number of rotations 16 times to form a complete Lissajous figure.
4. Peel off the paper and draw two parallel lines on it, just intersecting the outermost curves on the two opposite sides of the graph. Draw two more parallel lines for the other sides. Check the symmetry of a total of 31 curves using appropriate methods. Consult the instrument supplier if the curves overlap or are unevenly distributed.

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