How To Adjust The Focus Of The Laser Cutting Machine?


1.Cnc positioning and spotting method of laser focus

 

CNC positioning method: use a flat and clean white cardboard, lay it on the worktable, set the laser cutting head above it, the height of the focusing mirror from the cardboard is about 10mm smaller than the focal length of the focusing mirror, such as focusing The focal length of the mirror is 127mm, so set the focusing mirror about 117mm from the cardboard. The CNC system sets the cutting head to move every 10mm along the X-axis or Y-axis, and the Z-axis rises by 1mm at the same time as each movement, and the distance of 20 consecutive movements can be set. Each time it moves in place, a total of 20 holes are punched in 20 times, and the height of the Z axis is raised by 20mm. Observing these 20 holes, it can be found that the diameter of the holes varies from large to small, and then from small to large. Find the position with the smallest aperture which is the focal position, and record this point. Measuring the distance of the cardboard from the lens at this position is the actual laser beam focal position.

 

2.Inclined focus cautery

 

Inclined focus burning method: This method is shown as follows, a straight board is placed on the workbench at an angle of about 10 degrees. Set the cutting head at point A, the height from point A to the focusing mirror is 20mm smaller than the focal length of the focusing mirror, and the CNC system sets the cutting head to move continuously horizontally along the X-axis or Y-axis for 230mm, and the laser output when the movement starts 200W continuous laser, when the cutting head stops moving, the laser also stops. At this time, it can be seen that there is a burning mark of the laser beam on the board, which changes from wide to narrow, and then from narrow to narrow. Take the narrowest part of the trace as the focal position, record this point, and measure the distance between the board at this position and the lens is the actual laser beam focal position.

 

3.laser cutting direct cautery

 

Direct cauterization method: This principle is to hold a flat wooden board, immediately form an 85-degree angle on the cutting table, and raise the cutting head to a position where the focusing mirror is about 1.5 times the focus of the table surface. Open the laser shutter, continuously output a 200W laser beam, move the board horizontally and quickly to the bottom of the focusing mirror, you can see that there will be a burning mark on the board surface before and after the laser beam is focused from wide to narrow, and from narrow to wide. The changes in the laser beam focusing process are very close. Take the narrowest part of the trace as the focal position, record this point, and measure the distance between the board at this position and the lens is the actual laser beam focal position. Because this method requires manual operation, special attention should be paid to safety to avoid personal injury.

 

1.CNC positioning and spotting method of laser focus

 

CNC positioning method: use a flat and clean white cardboard, lay it on the worktable, set the laser cutting head above it, the height of the focusing mirror from the cardboard is about 10mm smaller than the focal length of the focusing mirror, such as focusing The focal length of the mirror is 127mm, so set the focusing mirror about 117mm from the cardboard. The CNC system sets the cutting head to move every 10mm along the X-axis or Y-axis, and the Z-axis rises by 1mm at the same time as each movement, and the distance of 20 consecutive movements can be set. Each time it moves in place, a total of 20 holes are punched in 20 times, and the height of the Z axis is raised by 20mm. Observing these 20 holes, it can be found that the diameter of the holes varies from large to small, and then from small to large. Find the position with the smallest aperture which is the focal position, and record this point. Measuring the distance of the cardboard from the lens at this position is the actual laser beam focal position.

 

2.Inclined focus cautery

 

Inclined focus burning method: This method is shown as follows, a straight board is placed on the workbench at an angle of about 10 degrees. Set the cutting head at point A, the height from point A to the focusing mirror is 20mm smaller than the focal length of the focusing mirror, and the CNC system sets the cutting head to move continuously horizontally along the X-axis or Y-axis for 230mm, and the laser output when the movement starts 200W continuous laser, when the cutting head stops moving, the laser also stops. At this time, it can be seen that there is a burning mark of the laser beam on the board, which changes from wide to narrow, and then from narrow to narrow. Take the narrowest part of the trace as the focal position, record this point, and measure the distance between the board at this position and the lens is the actual laser beam focal position.

 

3.laser cutting direct cautery

 

Direct cauterization method: This principle is to hold a flat wooden board, immediately form an 85-degree angle on the cutting table, and raise the cutting head to a position where the focusing mirror is about 1.5 times the focus of the table surface. Open the laser shutter, continuously output a 200W laser beam, move the board horizontally and quickly to the bottom of the focusing mirror, you can see that there will be a burning mark on the board surface before and after the laser beam is focused from wide to narrow, and from narrow to wide. The changes in the laser beam focusing process are very close. Take the narrowest part of the trace as the focal position, record this point, and measure the distance between the board at this position and the lens is the actual laser beam focal position. Because this method requires manual operation, special attention should be paid to safety to avoid personal injury.

 

Sheet fabrication services for mild steel, high strength low alloy (HSLA) steel, cold/hot rolled steel, galvanized steel, stainless steel, aluminum, copper and brass. Capable of fabricating parts up to 12 ft. length and +/-0.001 in. tolerance. Various capabilities include contract manufacturing,custom stamping,edge rolling, forming,top laser cutting, roll bending and welding. Finishing and secondary services such as hardware installation, tapping, deburring, cleaning, heat treating, plating, anodizing and painting available. Sheet Metal Prototype and low to high volume production runs offered. Suitable for commercial/residential architectural, aluminum brake shape parts, wall panel systems, brackets, general flashings, rails, call button plates and ship building component parts.

Related Posts