How to judge whether Martindale tester is qualified

The Lissajous figure is a figure formed by a changing movement. The movement is repeated diagonally from a circle to a gradually narrowing ellipse until it becomes a straight line, and from this straight line to a reverse tapering to a widening ellipse until it becomes a circle. However, many commercially available Martindale testers have confusing Lissajous trajectories that do not meet the standard requirements.
Method for checking the Lissajous figure
Remove materials from the abrading tables.Cover each abrading table surface with a plain white paper measuring (100±5) mm in diameter of minimum mass per unit area 100 g/m2 and secure paper to abrading table ensuring the surface is perfectly flat.
Insert a steel sleeve of the same diameter as the specimen guide spindle counterbored to accept the introduction of a refill from a typical ballpoint pen through each of the specimen holder spindle bearings in turn in the specimen holder guide plate, so that the ball tip is resting on the surface of the paper. Set the machine for 16 abrasion rubs to produce one complete Lissajous figure.
Draw two parallel lines which just touch the outermost curves on two opposing sides of the Lissajous figure. Draw two more parallel lines for the other two sides making sure the lines intersect at right angles. Measure each side to an accuracy of ±0.2 mm using suitable means. Check that 31 curves are drawn. It is important to check the symmetry of the Lissajous figures.
Smartindale Martindale Abrasion and Pilling Tester CV210 replaced the traditional analog drive with a digital drive, an exclusive innovation in the industry, the combination of dual servo motors, microcontroller, embedded, mathematical model, point-to-point drive, etc., single point directly generated LISSAJOUS, with higher precision and reliability of the equipment.
Unique calibration-free function and three test modes can switch by one-touch ensure accurate and convenient operation.
Can be networked with cell phones, set parameters on the cell phone, monitor the test status, get equipment warning reminders, supplies replenishment reminders, etc., and share equipment test status with one click.

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