{"id":367,"date":"2026-09-19T16:13:49","date_gmt":"2026-09-19T08:13:49","guid":{"rendered":"https:\/\/www.ypmfg.com\/2026\/09\/19\/g01-code-in-cnc-what-it-does-and-when-it-matters\/"},"modified":"2026-09-19T16:13:49","modified_gmt":"2026-09-19T08:13:49","slug":"g01-code-in-cnc-what-it-does-and-when-it-matters","status":"publish","type":"post","link":"https:\/\/www.ypmfg.com\/de\/2026\/09\/19\/g01-code-in-cnc-what-it-does-and-when-it-matters\/","title":{"rendered":"Der G01-Code in der CNC: Was er bewirkt und wann er wichtig ist"},"content":{"rendered":"<div style=\"margin: 0 auto;padding: 20px;font-family: -apple-system, BlinkMacSystemFont,\">\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Kurze Antwort:<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">G01 is the linear interpolation command in CNC programming. It directs the cutting axis to travel from one programmed coordinate to the next in a straight line at a specified feed rate. Unlike G00, which moves at rapid traverse speed, G01 engages the spindle and feeds material at a controlled, cuttable rate. This makes it the primary G-code for <strong style=\"font-weight: 600;color: #b32050\">material removal<\/strong> in <strong style=\"font-weight: 600;color: #b32050\">CNC-Bearbeitung<\/strong>. Feed rate, work offset, and modal state all influence how G01 performs on the shop floor. Getting these parameters right directly affects dimensional accuracy, tool life, and part quality.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Most machinists call G01 thousands of times per program, yet small errors in feed selection or work offset setup can quietly degrade a full batch of parts. YPMFG engineers review customer G-code for <strong style=\"font-weight: 600;color: #b32050\">custom machined parts<\/strong> to catch these issues before first-article production. The sections below explain what G01 does mechanically, how it differs from G00, and where mistakes most often surface.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">How G01 Works in a CNC Machine<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">G01 tells the controller to move the tool along a straight-line path between two programmed points. The controller calculates intermediate positions and commands each axis to move simultaneously at the programmed feed rate.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">The command is modal. Once G01 is active, it stays in effect until another motion code such as G00, G02, or G03 replaces it. Programmers often place G01 at the top of a subroutine or immediately after a G00 positioning move.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Key behavioral points to keep in mind:<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Spindle must be on (M03 or M04) before a G01 cutting move begins.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Coolant (M08 or M09) is typically activated on the same block or just prior.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Feed rate units depend on G20 (inches) or G21 (metric) mode.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><img decoding=\"async\" src=\"https:\/\/www.ypmfg.com\/wp-content\/themes\/mb\/images_nengli\/prototype-to-production-manufacturing-optimized.jpg\" alt=\"g01 code in cnc_g01 code in cnc_g01 code in cnc\" style=\"width: 100%;max-width: 960px;height: auto;display: block;margin: 1.8em auto;border-radius: 0px\"><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">A missing F word causes the machine to use the last stored feed, which may not match your intent.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">G01 vs. G00: A Quick Comparison<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">G00 moves the tool at maximum rapid traverse speed with no material removal. G01 moves at a programmed feed rate and is designed for actual cutting. Confusing the two is one of the most common sources of air cuts or unexpected tool engagement on the floor.<\/p>\n<table style=\"width: 100%;border-collapse: collapse;margin: 1.6em 0;border-radius: 10px 10px 0 0;overflow: hidden\">\n<tr>\n<th style=\"background: #9e1840;color: #fff;padding: 14px 16px;text-align: left;font-weight: 600;border: 1px solid #e0e0e0\">Parameter<\/th>\n<th style=\"background: #9e1840;color: #fff;padding: 14px 16px;text-align: left;font-weight: 600;border: 1px solid #e0e0e0\">G00 (Rapid)<\/th>\n<th style=\"background: #9e1840;color: #fff;padding: 14px 16px;text-align: left;font-weight: 600;border: 1px solid #e0e0e0\">G01 (Linear Feed)<\/th>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Geschwindigkeit<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Machine max traverse, often 2,000\u20136,000 mm\/min<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Programmed F value, typically 50\u20132,000 mm\/min<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Spindle<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Usually off<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Must be on for cutting<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Material removal<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Nein<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Ja<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Modal behavior<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Replaced by any other G-code<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Persists until another motion code appears<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Typical use<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Tool change, repositioning<\/td>\n<td style=\"padding: 12px 16px;color: #222222;border: 1px solid #e0e0e0\">Drilling feed, facing, turning, milling<\/td>\n<\/tr>\n<\/table>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">The split is simple: use G00 to position the tool near the workpiece, then switch to G01 for the cut. YPMFG programmers standardize this sequence in every <strong style=\"font-weight: 600;color: #b32050\">CNC program<\/strong> they release to the floor to eliminate rapid-into-cut errors.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Feed Rate, Surface Finish, and Tool Life<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Feed rate is the single G01 parameter that most directly shapes <strong style=\"font-weight: 600;color: #b32050\">Oberfl\u00e4chenbeschaffenheit<\/strong> and tool wear. A higher F value removes more material per revolution but leaves a more visible step pattern. A lower feed produces a smoother finish yet increases cycle time and can cause built-up edge on soft alloys.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">The right F value depends on material, tool diameter, depth of cut, and spindle RPM. For <strong style=\"font-weight: 600;color: #b32050\">CNC-Drehen<\/strong> of 6061 aluminum, feeds between 0.1 and 0.3 mm\/rev are typical for a finishing pass. For milling 4140 steel, 0.05\u20130.15 mm\/tooth may be more appropriate. Always verify against the tool vendor&#8217;s recommended cutting parameters before locking in a program.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">In many cases, a feed override on the machine panel (80\u2013120 %) lets the operator fine-tune finish without rewriting the program. YPMFG documents the recommended override range on every <strong style=\"font-weight: 600;color: #b32050\">machined component<\/strong> it ships so shop-floor teams can adjust without guessing.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Common G01 Programming Mistakes to Avoid<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Even experienced programmers hit these errors regularly:<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><img decoding=\"async\" src=\"https:\/\/www.ypmfg.com\/wp-content\/themes\/mb\/images_nengli\/wire-edm-service.webp\" alt=\"g01 code in cnc_g01 code in cnc_g01 code in cnc\" style=\"width: 100%;max-width: 960px;height: auto;display: block;margin: 1.8em auto;border-radius: 0px\"><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Missing F word after a tool change.<\/strong> The machine uses the last stored feed, which may belong to a different tool. Always place an explicit F on the first G01 block.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">G01 without M03 or M04.<\/strong> The tool scores the workpiece instead of cutting,producing a rough, damaged surface.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Wrong G20\/G21 mode.<\/strong> A metric program run under inch mode feeds 25.4\u00d7 faster than intended. Verify the mode at program start.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Overlapping work offsets.<\/strong> G54, G55, and other WCS calls can stack, shifting every G01 move by the offset difference.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Cutter compensation not cancelled.<\/strong> G41 or G42 must be cleared before a G00 rapid move, or the tool can crash into the workpiece.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Working through these five checks before releasing a program prevents the majority of scrap and machine alarms. YPMFG includes a pre-run <strong style=\"font-weight: 600;color: #b32050\">G-code review checklist<\/strong> with every custom part order so in-house teams can catch issues early.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Questions Machinists and Buyers Often Ask<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Does G01 work the same on turning lathes and 3-axis mills?<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong>Yes, the command structure is identical, but the active axis set differs. On a lathe, G01 typically drives X and Z. On a 3-axis mill, it drives X, Y, and Z. Feed units and cutter compensation rules also vary between the two.<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Can I use G01 for peck drilling?<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Peck drilling usually runs on canned cycles such as G73 or G83, which internally call G01 for each feed advance. If you write the peck manually, each advance leg is a G01 move at the drilling feed rate.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">What happens if I omit the F word on a G01 block?<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong>The controller uses the last stored F value. If that value came from a different tool or a faster cut, the machine feeds at an unintended rate. Always place an explicit F on the first G01 after any tool or mode change.<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Is G01 modal on every CNC controller?<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">On Fanuc, Siemens, Haas, and most industrial controllers, G01 is modal. Some hobby-controller firmwares treat every motion block as non-modal, so the G01 word must appear on each block. Check your controller manual.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">How do I verify a G01 program before cutting a real part?<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Run the program in simulation with the correct post-processor and tool library. Step through the first and last G01 blocks at 5 % feed override on the machine before full-speed production. YPMFG runs post-processing simulation on every program it delivers.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\"><strong style=\"font-weight: 600;color: #b32050\">Finding the Right CNC Partner for Your Part<\/strong><\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">Getting G01 right is one piece of a reliable <strong style=\"font-weight: 600;color: #b32050\">CNC-Bearbeitung<\/strong> process. The other pieces include material selection, toolpath strategy, fixturing, and first-article inspection. When your design calls for tight tolerances, thin-wall features, or mixed-material assemblies, the partner you choose matters as much as the code itself.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">YPMFG reviews every set of drawings and G-code before cutting. The team checks feed rates, tool selection, work offsets, and post-processor output against your specified tolerances and material. You can send your <strong style=\"font-weight: 600;color: #b32050\">technical specifications<\/strong>, CAD files, and any existing G-code to YPMFG for an engineering review and a <strong style=\"font-weight: 600;color: #b32050\">CNC machined parts<\/strong> quote. The goal is to catch issues on paper before they become scrap on the floor.<\/p>\n<p style=\"margin: 1.25em 0;line-height: 1.9;font-size: 16px;color: #222222;text-align: justify;letter-spacing: 0.02em\">If you are comparing several suppliers, ask each one to walk you through their G01 feed logic, simulation process, and inspection report format. The answers tell you more about their quality system than any marketing claim.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Quick answer:G01 is the linear interpolation command in CNC programming<\/p>","protected":false},"author":1,"featured_media":368,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44],"tags":[55,151,330,331,332],"class_list":["post-367","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cncmachining","tag-cncprogramming","tag-g01","tag-materialremoval","tag-technicalspecifications"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>G01 Code in CNC: What It Does and When It Matters<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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