Direct type: The action principle is similar to a button, which is triggered by the collision of the bumper on the moving part. When the bumper on the external moving part touches the button to make the contact move, after the moving part leaves, the contact is automatically reset under the action of the spring .

Rolling type: When the stopper iron of the sports machine is pressed on the roller of the travel switch, the transmission bar rotates together with the rotating shaft, so that the cam pushes the collision block. When the collision block touches a certain position, the micro switch is pushed to act quickly. The single-wheel automatic recovery roller can be reset after the stopper iron is removed, while the two-wheel rotation type requires the sports machine

to move in the opposite direction, and the stopper iron collides with the other roller to recover .

Non-contact rotary limit switch

Photoelectric type: Using the principle of light blocking, a light shielding sheet is set on the rotating part. When the rotation is blocked or turned on at a specific angle, the photoelectric sensor receives the corresponding change and outputs the signal. Its advantages are high precision and fast response speed, which are suitable for occasions that require high accuracy and speed. The disadvantage is that it is easily affected by dust, oil, etc

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