Coupling alignment is to approximately regard the projection of the motor's movable end face circle on the fixed end face as a perfect circle, and the distance from the center of the movable end to the fixed end face remains unchanged. The axis of the movable end and the axis of the fixed end are on the same line. In actual alignment, an allowable error is set. When the error generated during alignment is within the allowable error range, it indicates that the alignment is complete. In many cases, the lower detection point of the coupling cannot be detected, and the alignment work cannot be carried out.

The connection of the coupling must be firm. The connection bolts and keys must not be loose. Radial and end face runout of the coupling during operation. When the coupling bolt holes are severely worn, the mechanism will vibrate during operation, and even the bolts may break. If the bolt holes are severely worn and cannot be repaired, the coupling should be scrapped. Damaged rubber pads of the coupling should be replaced in time. If they are squeezed and damaged, vibration will occur. The half-body should be rotated at an angle and re-drilled.
For couplings with lubrication devices, check whether the oil seal is intact, whether the lubricating oil has deteriorated, and whether there is oil leakage. If they are misused or not installed correctly during use, they are prone to damage. Ensure that the deviation is within the normal operating range of the coupling. During operation, frequently check whether the coupling has any abnormal phenomena. If any abnormal phenomena occur, repair them promptly. To prevent fretting wear caused by high-speed operation, which may lead to micro-cracks in the bolt holes and damage.
The couplings themselves also have a certain degree of metal elasticity. And in the actual transmission process, they have a large torque structure. Compared with the couplings themselves, they are very compact and can accurately transmit speed. When the torque reaches the range that the coupling cannot withstand, the elastic body will have problems. At this time, it will give a warning to avoid damage to the equipment.