Laser delay command of laser marking machine marking command

When the laser marking machine is marking, there are two types of laser delay commands, which are the light-on delay and the light-off delay. In the whole marking process, the laser delay only works at the time of turning on the light at the start of marking and the time of turning off the light at the end of the marking. Does not affect the time required for the entire process.

Laser on-delay, if there is a switch-on action during the execution of a marking command, the switch-on delay takes effect, mainly after the laser command is issued, the delay The laser on command is executed after the specified time, that is to say, the time of turning on the light is delayed backward. The reasons for this are described in detail below.

During the laser marking process, the marking is required to be uniform in each part without obvious change, especially in a There is no focus at the beginning and end of the vector graphics (at the same point, if the laser stays longer than other points, the ablation of this point is significantly more serious than elsewhere, this phenomenon is called focus), which The laser intensity is required to be uniform at any point of the marking. The most important way to solve this problem is to keep the moving speed of the galvanometer motor constant when the laser power is constant. Then, at the beginning of marking, the scanning mirror must be accelerated to the specified speed first, and the speed of the galvanometer is very slow at the beginning. If the laser is in the light-on state at this time, because the speed of the galvanometer at this point is slow, it is equivalent to If the laser stays at this point for a long time, a heavy point will appear. In order to avoid this kind of situation, it is necessary to set an appropriate delay time. By delaying the galvanometer motor to reach the specified speed, the laser is just turned on, which effectively avoids the key phenomenon. Of course, if the delay time of the laser marking equipment is too long, it will also cause bad marking effect. Influence.

Laser off delay, when the laser off action is executed, the laser off delay takes effect, mainly after the laser off command is issued, the delay After the specified time, the laser is turned off, and its necessity is analyzed below.

Due to the acceleration change at the beginning of the movement, there will be a deviation between the set position and the actual position, after completing a marking command, the laser cannot be turned off immediately , because the scanning galvanometer has not yet reached the setting position, if the laser is turned off at this time, the processed graphics will be incomplete, so it is necessary to delay for a certain period of time before turning off the laser.

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