What is the difference between grating ruler and magnetic grating ruler

1.Grating Ruler

A grating ruler is a sensor made using the principles of interference and diffraction of light.Grating rulers are often used in closed-loop servo systems of CNC machine tools like cnc press brake, which can be used for detecting linear or angular displacement.The measured output signal is a digital pulse, which has the characteristics of large detection range, high detection accuracy, and fast response speed.

2.Magnetic grating ruler

Magnetic grating ruler is a sensor made using the principle of magnetic poles. The base ruler is a steel strip that is uniformly magnetized. The S and N poles are evenly spaced on the steel strip, and the changes in the S and N poles are recorded through a reading head.

3.Advantages and disadvantages of grating ruler and magnetic grating ruler

(1) The accuracy of the grating ruler is relatively high (± 0.005mm), but it is greatly affected by temperature (usually used in environments below 40 ° C), and has high requirements for the surrounding environment, resulting in a relatively short service life.

(2)The accuracy of the magnetic grating ruler is relatively low (± 0.01mm), but it has better resistance to water, oil, dust, and vibration, stronger adaptability to the environment, and a relatively long service life.

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