Frequently asked questions about laser cutting machine

 1. There are three simple methods to determine the cutting focus in the industrial field:

1. Printing method: move the cutting head from top to bottom to perform laser beam printing on the plastic plate, and the focus point is the smallest printing diameter.

2. Blue spark method: remove the nozzle, blow air, hit the pulse laser on the stainless steel plate, and move the cutting head from top to bottom until the blue spark is the focus.

3. Inclined plate method: Use a plastic plate placed at an angle to the vertical axis to pull it horizontally, and find the focus of the laser beam at the smallest point.

Because the laser power density has a great influence on the cutting speed, the choice of focus position is particularly important, and do not stare at the laser processing manipulation.

2. Is it dangerous to operate the laser cutting machine?

Laser cutting is a very environmentally friendly cutting method, generally speaking, it is not harmful to the body.

3. What are the applications of laser cutting machines?

Laser cutting machine is widely used in automobile manufacturing, kitchenware industry, sheet metal processing, advertising industry, machinery manufacturing due to its wide cutting range, high cutting speed, narrow cutting seam, good cutting quality, small heat affected zone, flexible processing, etc. Chassis cabinet, elevator manufacturing, fitness equipment and other industries.

4. What is the cutting thickness of the laser cutting machine?

At present, the thickness of the laser cutting machine generally does not exceed 25mm. Compared with other cutting methods, it has a significant advantage for cutting materials that require accurate dimensions below 20mm. However, if the safe operation method is not followed, it will cause personal injury or damage to the machine.

At present, many manufacturers’ machines have achieved automatic focusing. Among them, high-power CO2 lasers and YAG lasers are widely used in processing; fiber lasers based on fiber-based substrates have significant advantages in reducing thresholds, oscillation wavelength range, and wavelength tunable performance, and have become emerging technologies in the laser field. With the automatic focusing function, the processing efficiency of the laser cutting machine can be significantly improved: the punching time of thick plates is greatly reduced; when processing workpieces of different materials and different thicknesses, the machine can automatically adjust the focus to the most suitable position quickly.

Be careful of flammable materials when using the machine.

5. What types of lasers are there and what are their differences?

At present, the lasers used for laser processing and manufacturing mainly include CO2 lasers, YAG lasers, and fiber lasers. Compared with ion cutting and oxygen cutting, the laser cutting produces less dust, weak light and low noise.

6. What are the factors that affect the accuracy of the laser cutting machine?

1. There are many factors that affect the accuracy of laser cutting, some are determined by the equipment itself, such as the accuracy of the mechanical system, the shock level of the worktable, the quality of the laser beam, the influence of the auxiliary gas and the nozzle, etc.; some are inherent factors of the material, such as the material Physicochemical properties, material reflectivity, etc.; there are some factors that make selections based on detailed processing objects and user quality requirements, and make corresponding adjustments to determine relevant parameters, such as output power, focus position, cutting speed And auxiliary gas.

2. During the work of the machine, the operator is forbidden to leave without authorization, so as to avoid unnecessary losses.

7. The spot size after laser beam extraction is proportional to the focal length of the lens. What is the working principle of laser cutting machine?

Laser cutting is to use a focused high power density laser beam to irradiate the workpiece, so that the material at the irradiated area quickly melts, vaporizes, ablate or reaches the ignition point, and at the same time, the molten material is blown out by the high-speed air flow coaxial with the beam and moved through the CNC mechanical system The spot irradiates the position to realize a thermal cutting method for cutting the workpiece.

4. Do not store explosive and flammable materials in the laser processing area. It is forbidden to observe the laser through binocular telescope, microscope, magnifying glass, etc. Certain materials are not allowed to be cut on the laser cutting machine, including foam core materials, any PVC materials, high reflective materials, etc.

8. Abnormal phenomena such as random walking or pause of the machine

1. Generally, it is caused by the interference of static electricity on the control card. The laser cutting machine recommends that the customer connect a reliable ground wire to the casing and the laser power supply casing;

2. When the offline card is working, it is recommended to unplug the USB cable connected to the computer to avoid interference caused by downtime.

Nine, the size of the cut graphics is not accurate

1. Adjust the software file settings. The pulse equivalent in the workbench is generally 32, sending 6400 pulses per movement. Depending on the machine, 32 can be increased and decreased to make fine adjustments to achieve the best cutting accuracy.

10. The sound of the card appears when the machine moves

1. Check whether the bearing beads in the synchronous wheel are broken and need to be replaced;

2. If the camera is used for automatic cutting, the card during the laser engraving machine recognition process may be broken in the middle of the camera data signal line and need to be replaced;

3. Check whether the motor shaft is broken and need to be replaced;

11. The machine does not move or the size of the figure cut out changes irregularly

1. Turn on the machine and check whether the driver and the motor are powered on (the hand cannot be pushed by the power on). When the drive is working normally, the green light is on. If the track of the motor can be pushed after powering on, the motor shaft may be broken, and the motor needs to be replaced;

2. The power supply for the drive is generally 24V DC to 60V DC. You can use a multimeter to check whether the switching power supply is normal, and you need to replace it.

Twelve, cut constantly, not sure, run

1. The power of the laser tube is weak and needs to be replaced;

2. The film on the reflecting lens of the focusing lens is worn or polluted, and it needs to be cleaned or replaced with absolute alcohol;

3. The light is offset, not correct, adjust the light from the laser tube to the lens of the reflector frame, and then adjust the light reflected to the focus sheet to ensure that the light is adjusted from the upper left, lower left, upper right, lower right and middle points of the platform. Shot from the laser mouth;

4. The working table is not flat, ensure the error is below 2-3 mm, the thicker the cut material, the higher the requirement, adjust or replace;

5. The screws on the synchronous wheel may be loose, or the belt is loose, use the inner hexagon to tighten;

6. The sawtooth or total light adjustment is not correct because the lens is loose, tightened and then adjusted or used.

Pay attention to the maintenance of the machine, many problems are artificial or adjusted, please pay attention to the following aspects when using:

1. It is recommended to change the pure water once a week. In the summer, pay attention to the water temperature above 40 degrees and replace or take measures, otherwise it will reduce the service life of the laser tube or damage the laser tube;

2. The focused reflective lens is scrubbed with absolute alcohol for one week, and it cannot be immersed for a long time. Generally, it needs to be cleaned if it is contaminated.

3. It is recommended to blow the dust in the laser power supply once a month with an air gun to prevent the static electricity from burning out the power supply;

4. The oil lubrication in the rails and bearings is performed once a month, and the dust and scraps are removed once a month in the workbench and exhaust fan;

5. The camera cutting machine can achieve the best recognition and cutting effect once a month.