A lissajous is any one of an infinite variety of curves traced out by a point which undergoes two simple motions in perpendicular directions.

It is named after Jules A. Lissajous, a French physicist who lived 1822 – 1880.

The shape of a lissajous is characteristic of the relative phases and frequencies of the motion.

When testing abrasion on a Martindale to ISO 12947, the instrument is set to create the lissajous pattern shown.

The lissajous is created by 16 rubs and has a total length of 3.02m.

The motion of a Martindale can be changed to alter the lissajous pattern for different applications.

This is done by adjusting the positions of the drive pegs.

The explanations below are general, and the standard should always be consulted.

Use the top setting for straight line motion

Use the middle setting for pilling tests.

Use the bottom setting for abrasion tests.