{"id":1476,"date":"2026-01-21T06:42:37","date_gmt":"2026-01-21T06:42:37","guid":{"rendered":"https:\/\/www.lasercutting-world.com\/blog\/?p=1476"},"modified":"2026-05-11T07:38:00","modified_gmt":"2026-05-11T07:38:00","slug":"how-to-solve-the-problem-of-edge-burning-in-fiber-laser-cutting-machines","status":"publish","type":"post","link":"https:\/\/www.lasercutting-world.com\/blog\/how-to-solve-the-problem-of-edge-burning-in-fiber-laser-cutting-machines\/","title":{"rendered":"How to solve the problem of edge burning in fiber laser cutting machines?"},"content":{"rendered":"\n

How to solve the problem of edge burning in fiber laser cutting machines?<\/a> Edge burning<\/a> (over-burning) is a common challenge in fiber laser cutting<\/a>, particularly when dealing with carbon steel<\/strong> or sharp corners<\/strong>. It occurs when excessive heat accumulates in a small area, causing a runaway exothermic reaction with the oxygen assist gas.<\/p>\n\n\n\n

Here is a comprehensive guide to solving edge burning through parameter adjustment and technique:<\/p>\n\n\n\n

1. Optimize Corner Handling<\/h3>\n\n\n\n

Corners are the most frequent sites for edge burning because the machine decelerates, allowing the laser to dwell on a single point for too long.<\/p>\n\n\n\n

    \n
  • Lead-in and Lead-out:<\/strong> Ensure the laser enters the path from a “lead-in” line outside the actual part. For sharp corners, use a circular or “loop” lead-in<\/strong> to maintain a constant speed.<\/li>\n\n\n\n
  • Power Ramping (Slope):<\/strong> Configure the laser to reduce power automatically as the cutting head slows down for a corner and increase it as it accelerates.<\/li>\n\n\n\n
  • Corner Cooling:<\/strong> Some software allows for a “Cooling Point” or “Micro-joint” at sharp vertices, briefly pulsing the laser or pausing to let the metal cool before continuing.<\/li>\n<\/ul>\n\n\n\n

    2. Adjust Gas Parameters<\/h3>\n\n\n\n

    The assist gas is your primary tool for thermal management.<\/p>\n\n\n\n

      \n
    • Switch to Nitrogen:<\/strong> If you are cutting thin mild steel with Oxygen and getting burnt edges, switching to High-Pressure Nitrogen<\/strong> (Fusion Cutting) will eliminate the exothermic reaction entirely, as Nitrogen is inert.<\/li>\n\n\n\n
    • Gas Pressure:<\/strong> If sticking with Oxygen, increase the gas pressure<\/strong> slightly. More gas flow helps cool the area surrounding the cut, though too much can cause turbulence.<\/li>\n\n\n\n
    • Nozzle Selection:<\/strong> Use a smaller diameter nozzle<\/strong> for thin materials to concentrate the gas flow precisely where the beam hits, blowing away molten slag faster.<\/li>\n<\/ul>\n\n\n\n

      3. Modify Laser Parameters<\/h3>\n\n\n\n
        \n
      • Pulse vs. Continuous Wave (CW):<\/strong> Switch to Pulse Mode<\/strong> when cutting intricate details or sharp corners. Pulsing delivers energy in bursts, allowing the material to cool slightly between pulses.<\/li>\n\n\n\n
      • Focus Position:<\/strong> If the focus is too deep inside the material, heat builds up. Try moving the focus point upward<\/strong> (closer to the surface) to broaden the kerf slightly and allow gas to penetrate more effectively.<\/li>\n\n\n\n
      • Power Level:<\/strong> Simply lowering the peak power can help, but you must balance this with cutting speed to avoid “dross” (slag) at the bottom.<\/li>\n<\/ul>\n\n\n\n

        4. Material and Path Management<\/h3>\n\n\n\n
          \n
        • Part Spacing (Nesting):<\/strong> Avoid placing small parts too close together. The heat from one cut can “pre-heat” the adjacent part, making it highly susceptible to burning.<\/li>\n\n\n\n
        • Film-Coated Metal:<\/strong> If cutting stainless steel with a protective film, use a “Pre-light” or “Evaporation” pass to melt the film along the cut line first, preventing the film from trapping heat or interfering with the gas flow.<\/li>\n<\/ul>\n\n\n\n

          Summary Checklist for Troubleshooting<\/h3>\n\n\n\n
          If you see…<\/strong><\/td>Try this…<\/strong><\/td><\/tr><\/thead>
          Melting at sharp corners<\/strong><\/td>Add a “Cooling Point” or use “Power Ramping.”<\/td><\/tr>
          Rough, burnt edges on straight lines<\/strong><\/td>Increase gas pressure or increase cutting speed.<\/td><\/tr>
          Complete blowout on small holes<\/strong><\/td>Switch to Pulse Mode<\/strong> for the entire hole.<\/td><\/tr>
          Burnt top edge<\/strong><\/td>Move the focus position higher.<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

          How to solve the problem of edge burning in fiber laser cutting machines?Edge burning (over-burning) is a common challenge in fiber laser cutting, particularly when dealing with carbon steel or sharp corners. It occurs when excessive heat accumulates in a small area, causing a runaway exothermic reaction with the oxygen assist gas.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[44],"tags":[],"class_list":["post-1476","post","type-post","status-publish","format-standard","hentry","category-faq"],"taxonomy_info":{"category":[{"value":44,"label":"FAQ"}]},"featured_image_src_large":false,"author_info":{"display_name":"admin","author_link":"https:\/\/www.lasercutting-world.com\/blog\/author\/admin\/"},"comment_info":0,"category_info":[{"term_id":44,"name":"FAQ","slug":"faq","term_group":0,"term_taxonomy_id":44,"taxonomy":"category","description":"FAQ","parent":0,"count":37,"filter":"raw","cat_ID":44,"category_count":37,"category_description":"FAQ","cat_name":"FAQ","category_nicename":"faq","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/posts\/1476","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/comments?post=1476"}],"version-history":[{"count":2,"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/posts\/1476\/revisions"}],"predecessor-version":[{"id":1833,"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/posts\/1476\/revisions\/1833"}],"wp:attachment":[{"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/media?parent=1476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/categories?post=1476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lasercutting-world.com\/blog\/wp-json\/wp\/v2\/tags?post=1476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}