Random errors of laser cutting machine can only be eliminated through online detection and control. These errors are:
1. Geometric error of workpiece
The object of laser cutting is plate or panel type parts. Due to the influence of various reasons, the surface of the processing object has ups and downs, and the influence of thermal effect in the cutting process will also produce the surface deformation of thin plate parts. For 1-dimensional laser processing, the panel will also produce surface irregularities in the pressing process, all of which, Will produce random changes between the laser focus and the position and ideal position of the surface of the processed object.
2. Error caused by workpiece clamping device
The workpiece processed by laser cutting is placed on the needle like workbench. Due to processing errors, wear between the workpiece for a long time and laser burns, the needle bed will appear uneven, which will also produce random errors in the position between the steel sheet and the laser focus.
3. Errors caused by programming
In the process of laser cutting, the machining trajectory on the complex surface is fitted by lines, arcs, etc. These fitting curves have certain errors with the actual curves, which make certain errors in the relative position between the actual focus and the surface of the machining object and the ideal programming position. Some teaching programming systems also introduce some deviations.