{"id":4521,"date":"2026-01-20T11:27:24","date_gmt":"2026-01-20T11:27:24","guid":{"rendered":"https:\/\/www.luso-cad.com\/?p=4521"},"modified":"2026-06-18T10:45:00","modified_gmt":"2026-06-18T09:45:00","slug":"fillet-command","status":"publish","type":"post","link":"https:\/\/www.luso-cad.com\/en\/fillet-command\/","title":{"rendered":"How to Use the Fillet Command in LusoCAD: A Beginner's Guide"},"content":{"rendered":"
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The command <\/span>Fillet<\/strong> is one of the most useful tools in LusoCAD for those working with 2D technical drawings. It allows you to <\/span>rounding or joining corners<\/strong> using arches, offering greater precision and aesthetics in the design. In this article<\/span>, We'll explore the essential features of this command and its additional options.<\/span><\/p>

What is the Fillet Command?<\/h2>

O Fillet<\/em> creates a tangent arc between two 2D objects<\/strong>, usually lines or polylines. This arc can generate:<\/p>

  • Rounded corners<\/strong>, with a defined radius;<\/li>
  • Sharp corners<\/strong>, when the objects are extended to the point of intersection.<\/li><\/ul>

    This versatility makes the command indispensable in any technical drawing workflow.<\/p>

    How to Access the Fillet Command<\/h2>

    You can access Fillet<\/em> in two ways:<\/p>

    • From range of options<\/strong>;<\/li>
    • Or writing F<\/strong> in the model view.<\/li><\/ul>

      The programme then asks you to select the first and second object<\/strong>.<\/p>

      1. Create a Simple Fillet<\/h2>

      When you select two lines, LusoCAD automatically extends their lengths (if necessary) so that they meet, creating a clean corner - rounded or not, depending on the current settings.\"\"<\/p>

      2. Defining the Arc Radius<\/h2>

      Before selecting the objects, you can enter the subcommand R<\/strong> to define the arc radius<\/strong>.<\/p>

      For example:<\/p>

      • Write R<\/strong><\/li>
      • Enter the radius value (e.g: 50<\/em>)<\/li>
      • Then select the two lines<\/li><\/ul>

        With this, the corner is rounded with the chosen radius. When comparing a fillet with no defined radius and one with a radius of 50, the difference is obvious.<\/p><\/div>

        \"\"<\/p>

        3. Creating an Inverted Arc<\/h2>

        The subcommand Invert (I)<\/strong> allows you to create an arc curved in the opposite direction to the usual one, i.e. a inverted arch<\/strong>.<\/p>

        Just like before:<\/p>

        • Write I<\/strong><\/li>
        • Keep the radius (for example, 50<\/em>)<\/li>
        • Select the rows<\/li><\/ul>

          The result will be visually different, with an \u201cinward\u201d or \u201coutward\u201d arch depending on the geometry.<\/p>

          \"\"<\/p>

          4. Using the Trim Subcommand<\/h2>

          In some situations, two lines may cross beyond the point where we want to apply the fillet. This is where the Trim (T)<\/strong>, This controls whether the extra ends should be cut off or not.<\/p>

          • If you are active<\/strong>, the excess segments are removed.<\/li>
          • If you are deactivated<\/strong>, the fillet is created without shortening the lines.<\/li><\/ul>

            In this example, using:<\/p>

            • Radius 50<\/li>
            • Inverted arch<\/li>
            • Trim deactivated<\/strong><\/li><\/ul>

              The fillet is applied without changing the length of the original lines.<\/p>

              \"\"<\/p>

              5. Apply Fillet to Polylines<\/h2>

              To apply fillet automatically to all the intersections of a polyline<\/strong>, use the subcommand P<\/strong> before selecting it.<\/p>

              LusoCAD will apply the fillet to all vertices of the polyline at once, significantly speeding up work on complex objects.<\/p><\/div>

              \"\"<\/p>

              Conclusion<\/h2>

              The command Fillet<\/em> is a fundamental tool in LusoCAD for creating precise corners - whether rounded or sharp. Master the subcommands Lightning<\/strong>, Invert<\/strong>, Trim<\/strong> and Polilinha<\/strong> allows you to work more efficiently and with greater control over the design.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

              LusoCAD's Fillet command is an essential tool for creating rounded or precise corners, allowing for cleaner, more efficient and professional technical drawings.<\/p>","protected":false},"author":4,"featured_media":4535,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4521","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/posts\/4521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/comments?post=4521"}],"version-history":[{"count":7,"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/posts\/4521\/revisions"}],"predecessor-version":[{"id":5258,"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/posts\/4521\/revisions\/5258"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/media\/4535"}],"wp:attachment":[{"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/media?parent=4521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/categories?post=4521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.luso-cad.com\/en\/wp-json\/wp\/v2\/tags?post=4521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}