Do you know the focus positioning method of laser cutting machine?

The focus positioning method of the laser cutting machine is a problem that many customers are very concerned about. Generally speaking, to solve the focus positioning of the laser cutting machine, everyone needs to have a corresponding understanding of the working method of the laser cutting machine. Let's give a brief analysis of the blow.　　 The positioning of the laser focus is a very critical step. Only when the focus is set accurately can the steel plate cut have a good quality. Since the laser beam is infrared invisible light, it is impossible to find the focus of the laser beam by relying on human eye observation. So how can we locate the laser focus well? Today, our editor at Zhengzhou Baiwei Laser Cutting Machine Co., Ltd. will explain the three positioning methods of the laser focus: 　　1. CNC positioning and dotting method: use a flat, smooth white The cardboard is laid flat on the worktable, and the laser cutting head is set above it. The height of the focusing lens from the cardboard is 10mm smaller than the focal length of the focusing lens. For example, the focal length of the focusing lens is 127mm, then the focusing lens is set At a distance of about 117mm from the cardboard. The numerical control system sets the cutting head to move once every 10mm along the x-axis or y-axis, and the z-axis rises 1mm at the same time each time it moves, and the distance of 20 consecutive moves can be set. Every time it moves into place, use a laser to emit a 200W pulsed laser to divide, and punch a hole in the cardboard. A total of 20 holes were punched in 20 movements, and the height of the z-axis was increased by 20mm. Observing these 20 holes, we can find that the diameter of the holes gradually changes from large to small, and then from small to large. Find the position where the hole diameter is smaller is the focus position, and record this point. Measuring the distance between the cardboard and the lens at this position is the actual focus position of the laser beam.　　2. Inclined focus burning method: Place a straight wooden board obliquely on the workbench, with an inclination of about 10 degrees. Set the cutting head at point A. The height from point A to the focusing lens is 20mm smaller than the focal length of the focusing lens. The numerical control system sets the cutting head to continuously move horizontally along the x-axis or y-axis by 230mm, and the laser output 200W at the beginning of the movement. Continuous laser, the laser stops when the cutting head stops moving. This is because Ke saw a burnt trace of a laser beam that changed from wide to narrow and from narrow to wide on the wooden board. Take the narrowest part of the trace as the focal position, record this point, and measure the distance between the plank at this position and the lens is the actual focal position of the laser beam. 3. Direct burning method: hold a flat board and stand it on the cutting table at an angle of 85 degrees, raise the cutting head to the position where the focusing lens is about 1.5 times the focal length from the surface of the table, open the laser shutter, and continuously output 200W laser The beam, horizontally move quickly to the wood below the focusing lens, you can see that there is a burn mark on the surface of the wood that changes from width to narrow, and from narrow to wide before and after the laser beam is focused. This trace is very close to the change in the focusing process of the laser beam. . Take the narrowest part of the trace as the focal position, record this point, and measure the distance between the plank at this position and the lens is the actual focal position of the laser beam. Because this method requires manual operation, special attention must be paid to safety to avoid human body harm.　　 Wuhan Gaoneng Laser Equipment Manufacturing Co., Ltd. is a high-tech enterprise integrating Ru0026D, production and sales of professional laser complete equipment. Not only successfully developed laser equipment with advanced technology, but also used self-support import and export rights to promote products to more than forty global products including Hong Kong, South Korea, Vietnam, Malaysia, Thailand, Australia, the United States, Japan, Germany, the Netherlands, Jordan, etc. nation.