Presumably, we all know that the coaxial test must be done before the laser cutting machine is started and resumed, to ensure that the laser cutting machine can operate normally and avoid abnormal startup due to errors. Previously, we also wrote the "5 major inspection items for laser cutting machine startup inspection" to ensure the normal operation of laser cutting equipment.

First of all, we need to know which two axes are targeted for coaxial debugging of laser cutting machine?

Coaxial test mainly refers to the adjustment of the coaxiality between the outlet hole of the laser head nozzle and the laser beam. It is necessary to ensure that the nozzle is in the same line with the laser beam when it is out. From the cross section, it is a concentric circle.

Then, what will happen if the cutter coaxiality test is not done well before startup?

The coaxiality between the nozzle outlet hole and the laser beam is one of the important factors affecting the cutting quality. If the nozzle and the laser are different in axis, the slightly different effect will only affect the cutting surface. In severe cases, the laser will hit the nozzle, causing the nozzle to heat up and burn. Then, let's talk about the coaxiality test method to check whether your equipment has passed the coaxiality test.

Coaxiality detection method

Nozzle: 1.2mm

Tool: transparent adhesive tape

method:

1. Adjust the coaxial line at focal point 0 so that the laser is in the center of the nozzle;

2. Light up at the focal point ± 6mm;

3. If the focus 0 and ± 6mm polishing point are in the center of the nozzle, it is normal; Otherwise, replace the cutting head or the laser optical path is offset.

As shown in these figures:

Finally, if the laser head nozzle is different from the laser beam axis, how should it be adjusted? See the following method.

Coaxial adjustment method

【1】 Place an iron plate on the platform, lower the cutting head, and see that the spot size is about 1cm. Adjust the two screws to achieve the roundest effect, and there is a clear red light frame around;

【2】 Paste the transparent tape on the nozzle, and focus on the front. The spot power is set at 5% - 10%. Press the spot to emit light, and observe whether the laser spot on the tape is in the center of the nozzle;

【3】 If the laser spot is not in the center of the nozzle, tighten the screws on which side the laser spot is biased. Note that the angle of screwing should not be too large. Continue to use the tape to spot light. First, screw a little to see the effect. At the same time, loosen the other one a little, and slowly adjust until it is adjusted to the center.

The adjustment method is shown in the figure below: