The coupling is mainly the connection between the screw and the motor, and is one of the important parts in the linear module. The main purpose is to make the centerlines of the driving shaft and the driven shaft on the same line when the motor is working This is related to whether the linear slide table can operate normally and ensure the accuracy, so the coupling is particularly important for the linear module running at high speed.

When designing the linear module, the linear module stipulates that there is an allowable deviation value in the center of the two axes, which is also required when installing the coupling. From an assembly point of view, as long as the coupling can transmit torque safely and reliably, the center of the two axes can The larger the allowable deviation value, the easier it is to meet the requirements during installation. However, from the perspective of the quality of the linear module, the smaller the deviation of the centerline of the two axes, the more accurate the alignment, the better the operation of the linear slide table, and the longer the service life.

When installing the coupling of the linear module, we fix one end first. For example, after the coupling on the host side is positioned, adjust the other half coupling based on this. The characteristics of the linear module make it centered with the half coupling on the host side. . Fix the dial indicator on the half-coupling on the host side, the contact of the dial indicator touches the other half-coupling, and turn the coupling to align and adjust, and also fix the dial indicator on the non-host side half-coupling. On the shaft, the dial indicator contact contacts the half-coupling on the host side, and the alignment meter can be placed on the host side or the transmission side, mainly for the convenience of work. When centered, adjust the left and right values of the circumference = the sum of the upper and lower values. Then, the standard for checking the alignment is that the centers of the two pairs of wheels coincide, that is, the outer circles of the two pairs of wheels are coincident, and the joint surfaces (end faces) of the two pairs of wheels are parallel (the two center lines are parallel).

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