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Linear Modules for Precision Motion Will Be Transported to India

Linear Modules for Precision Motion are Ready for pickup to Indian Clients. 

Linear Modules for Precision Motion

The relationship between the positioning accuracy of ball screw and screw, and the repeated positioning accuracy
Definition of resolution, positioning accuracy, and repeated positioning accuracy.

Ball screw positioning accuracy of Linear Modules for Precision Motion: the error between the actual position reached when the machine equipment stops and the theoretical position reached. For example, if you request an axis to travel 100mm, but it actually travels 100.01mm, the additional 0.01 is the positioning accuracy.

Taking the ball screw of Linear Modules for Precision Motion as an example, if you set the straight-line running distance to 100mm and the actual movement distance of 100 screws is 99.9996mm to 100.002mm, then it can be said that its positioning accuracy is 0.006mm (100.002-99.996=0.006). Of course, the actual positioning accuracy of machinery and equipment is complex to calculate due to factors such as assembly accuracy, structural design, multi axis coordination, and displacement sensor accuracy.

Repeated positioning accuracy of ball screw: the error caused by multiple positioning runs to the same position. For example, if a ball screw is set to run in a straight line for example 100mm, run 1000 times, and the actual movement distance is 99.988mm to 99.992mm, then its repeated positioning accuracy is ± 0.002mm.

Usually, the accuracy of repeated positioning is much higher than that of positioning, about 2-10 times; And the positioning accuracy is between resolution and repeated positioning accuracy.
For example, the resolution (displacement resolution) of a grating ruler is 0.1 micrometers, and its repeated positioning accuracy is numerically greater than 0.1 micrometers, which may be 0.15um or 0.2um. Because the repeated positioning accuracy of the system is not only related to the accuracy and resolution of the grating ruler (displacement sensor), but also to the errors of the mechanical system, such as the guidance system, transmission system, structural rigidity, etc., it will reduce the positioning accuracy and to some extent, affect the repeated positioning accuracy.

That is to say, increasing resolution can improve positioning accuracy, and of course, it can also improve repetition accuracy. However, to improve the resolution of the system, the key is to improve the resolution of the mechanical system, not the resolution of the displacement sensor, because the resolution of the displacement sensor can be achieved through subdivision, but the mechanical resolution cannot keep up, which will make subdivision meaningless

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