Introduction of detection system of small laser marking machine

The small laser marking machine is composed of many parts. Yesterday we introduced the main part laser, and today we will learn about its inspection system.

The function of the detection system of the small laser marking machine is to detect whether the marking workpiece is in place in the production line, and it acts as a switch for marking. When the marking workpiece moves to the marking position, it will notify the computer to start the marking operation, and when the workpiece leaves the marking position, it will notify the computer to stop the marking operation.

The detection system uses an infrared detector, which consists of an infrared transmitter and a receiver. When there is no object in front of the detection system, the infrared ray emitted by the infrared transmitter cannot be received by the receiver. At this time, there is no signal output, and the signal voltage output is 0V; when an object passes through, the infrared ray emitted by the infrared transmitter will be reflected by the object, thus being The receiver receives a signal output, and the output voltage is +5V. The output signal voltage of the detection system is 0V or +5V, which can be directly recognized by the computer. It can be directly connected to the one-bit input port of the computer's printer interface, and then the detection signal can be obtained by reading the computer's printer port 0x378.

The entire marking control process is: when the marking workpiece moves to the marking position, the signal sent by the infrared receiver will output 0V to +5V, and the computer will detect Its printer port will detect its signal change, and then control the laser and galvanometer to mark through the printer port and D/A card respectively. At the same time, the computer will continue to detect the infrared detection signal of the printer port. When the signal becomes 0V, the workpiece is The marking operation will stop after leaving the marking position.

(This article is edited by the editor, please be sure to indicate the source:)

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