After a laser cutting machine has been used for some time, cutting accuracy may develop certain errors, which are often related to focal length changes. This article introduces how to debug laser cutting accuracy through spot focusing, focal length testing and simulated cutting inspection, helping you restore stable machining accuracy.
After a laser cutting machine has been used for a period of time, cutting accuracy may show certain errors. These problems are often caused by changes in focal length. Therefore, knowing how to debug accuracy is essential for daily laser cutting machine operation.
1. Focus the Laser Spot to the Minimum
First, adjust the laser light spot to the smallest possible position.
Test shoot to check the initial effect. Judge the focal length according to the size of the spot effect. When the laser spot reaches its minimum, this position is usually the best processing focal length. After confirming the optimal focal length, you can start formal processing.
2. Determine the Focal Length with Test Paper or Scrap Material
Before formal debugging, you can use debugging paper or workpiece scrap to test and confirm the accuracy of the focal length position.
Move the laser head up and down to adjust its height. The laser spot size will change at different heights. Make multiple adjustments at different positions to find the smallest spot position, so as to determine the correct focal length and the optimal laser head position.
3. Check Accuracy Through Simulated Cutting Graphics
After the laser cutting machine is installed, a marking device is usually installed at the cutting nozzle of the CNC cutting machine. You can use the marking device to draw a simulated cutting graphic for accuracy inspection.
Debugging Method
Draw a square of about 1 meter and a built-in circle with a diameter of 1 meter. The four corners are diagonally crossed.
After the marking is completed, use a measuring tool to check the following items:
- Whether the circle is tangent to the four sides of the square
- Whether the diagonal length of the square is about 1.41 meters
- Whether the central axis of the circle equally divides the square edges
- Whether the distance from the intersection point to both sides of the square is about 0.5 meters
By measuring the diagonal length, the circle tangency and the intersection distance, you can determine whether the cutting accuracy of the equipment is normal.
Final Suggestion
Focal length and mechanical accuracy are the key factors affecting cutting quality. When dimensional errors, focal drift or unstable cutting results occur, it is recommended to check the laser spot condition first, confirm the focal length, and then use simulated cutting graphics for further accuracy verification.
