Precision debugging of a fiber laser cutting machine focuses on three things: finding the best focal length, confirming the focal position is accurate, and verifying cutting precision with a scribing device.
Determine the optimal processing focal length
Focal length change is a main cause of cutting precision error. When the laser spot is adjusted to its smallest size, energy is most concentrated. This position is the optimal processing focal length.
During operation, do spot firing and observe the spot size. Find the position with the smallest spot. Set it as the optimal processing focal length, then start processing.
Use debug paper and workpiece scrap to check focal position accuracy
When the laser head height moves, spot size changes. Do spot firing at different heights to find the smallest spot position and determine the best focal length and laser head position.
Prepare debug paper and workpiece scrap. Move the laser head up and down, fire multiple spots, and observe spot size changes. Find the smallest spot position to determine the focal length and laser head position.
We can machine custom nozzles, protective lens holders, fixtures, and other precision parts for fiber laser cutting machines from customer drawings, for single-piece or low-volume production.
Test cutting precision with a scribing device
Install a scribing device on the cutting nozzle of the CNC cutting machine. Scribe a simulated cutting pattern, measure the pattern dimensions, and judge the cutting precision.
Install the scribing device: after the fiber laser cutting machine is installed, fit the scribing device on the CNC cutting machine nozzle.
Scribe the simulated pattern: use the scribing device to draw a 1 m square, with a 1 m diameter circle inside, and diagonal lines at the four corners.
Measure relevant dimensions:
Use a measuring tool to check whether the circle is tangent to all four sides of the square.
Measure whether the square diagonal length is √2.
Check whether the central axis of the circle bisects the sides of the square. That is, check whether the distance from the intersection point of the central axis and the two sides of the square to the square corner is 0.5 m.
Judge cutting precision: test the diagonal and the distance between intersection points. Use the measurement results to judge the cutting precision of the machine.
Our custom precision component machining capability is not limited to fiber laser cutting machines. Beyond cutting nozzles, protective lens holders, and fixtures, we also machine yacht precision components, RC car structural parts, medical device parts, and non-standard parts for filling machinery, printing machinery, and food machinery. Hansheng Automation works from customer drawings and production quantities to deliver single-piece or low-volume precision machining.
