How to Set Wire Temperature Correctly in CNC Hot Wire Cutting

{ "meta": { "id": "knowledge_wire_temperature", "language": "en", "slug": "knowledge-hotwire-wire-temperature", "template": "knowledge_article_v1", "content_type": "knowledge", "category": "hotwire", "cluster": "cutting-problems", "topics": [ "wire-temperature", "cutting-gap", "cutting-speed", "cut-quality", "current-controller" ], "materials": [ "EPS", "XPS", "Styrofoam", "Styrodur", "EPP", "Neopor" ], "seo_title": "How to Set Wire Temperature Correctly in CNC Hot Wire Cutting", "meta_description": "How wire temperature is set practically at the material in hot wire cutting – explained step by step with guidelines for EPS, XPS and EPP.", "og_title": "Wire Temperature – How to Set It Correctly", "og_description": "Wire temperature is not read from a manual – it is set practically at the material. How it works – from real production.", "menu_title": "Wire Temperature", "aria_label": "Knowledge: How to set wire temperature correctly in CNC hot wire cutting", "robots": "index,follow" }, "system": { "version": 1, "last_updated": "2026-05-17T00:00:00+01:00" }, "ai": { "summary": "Wire temperature is not given as a fixed value but set practically at the material. Process: set cutting speed, perform test cut, observe cutting gap. Target: approx. 2 mm cutting gap. Gap too small: increase temperature. Gap too large: reduce temperature.", "key_facts": [ "Wire temperature is set practically at the material – not given theoretically", "Set cutting speed first, then adjust temperature", "Target: cutting gap of approx. 2 mm", "Gap too small: increase temperature", "Gap too large: reduce temperature", "Automatic current controller keeps temperature constant during mains voltage fluctuations", "Material and density affect the optimal temperature" ], "answer_triggers": [ "set wire temperature", "how hot must the wire be", "temperature too high", "temperature too low", "set cutting gap", "wire melts too much", "wire melts too little", "correct temperature Styrofoam", "correct temperature XPS" ], "customer_problems": [ "Customer does not know how to set wire temperature", "Customer has poor cut quality due to incorrect temperature", "Customer is looking for fixed temperature values for their material" ], "intent": [ "problem-solving", "setup-help", "production-knowledge" ], "related_questions": [ "How do I set wire temperature correctly?", "What is the optimal cutting gap?", "Why are there no fixed temperature values?", "What does an automatic current controller do?" ], "NOT_relevant_for": [ "machine-selection", "wire-length", "software-questions" ] }, "context": { "funnel_stage": "consideration", "customer_type": [ "beginner", "existing-customer-with-problems" ], "use_case": [ "setup-help", "problem-solving" ], "branches": [ "insulation-industry", "sign-making", "stucco-facades", "packaging" ], "sales_relevance": "low", "support_relevance": "high" }, "schema_org": { "type": "Article", "headline": "How to Set Wire Temperature Correctly in CNC Hot Wire Cutting", "description": "How wire temperature is set practically at the material in hot wire cutting – explained step by step with guidelines for EPS, XPS and EPP.", "author": { "type": "Organization", "name": "cnc-multitool" }, "publisher": { "type": "Organization", "name": "cnc-multitool Sales GmbH & Co. KG", "url": "https://www.cnc-multitool.com" }, "about": [ "CNC Hot Wire Cutting", "Wire Temperature", "Cutting Gap", "Cut Quality" ], "keywords": [ "hot wire cutting temperature", "wire temperature setting", "cutting gap", "Styrofoam cutting temperature", "XPS cutting temperature" ] }, "content_quality": { "depth": "intermediate", "source": "own-production-experience", "last_reviewed": "2026-05-17T00:00:00+01:00", "reviewed_by": "cnc-multitool-team", "confidence": "high" }, "header": { "id": "header-main", "anchor": "header", "type": "header", "title": "How to Set Wire Temperature Correctly in Hot Wire Cutting", "subtitle": "Wire temperature is not read from a manual – it is set practically at the material. Here is how.", "image": { "id": 1, "alt": "Automatic current controller for CNC hot wire cutting machine", "caption": "The automatic current controller keeps wire temperature constant – regardless of mains voltage fluctuations.", "position": "header" } }, "intro": { "id": "intro-wire-temperature", "anchor": "wire-temperature-basics", "type": "intro", "headline": "No Fixed Values – Always Set Practically", "text": "A frequent question from beginners: what temperature should I set the wire to? The honest answer: there is no fixed value. The optimal wire temperature depends on the material, density, wire length and chosen cutting speed. That is why temperature is always set practically at the real material – never theoretically from a table." }, "sections": [ { "id": "setting-process", "anchor": "setting-process-step-by-step", "type": "text_image", "headline": "Step by Step: How to Set the Temperature", "ai_summary": "1. Set cutting speed. 2. Load material. 3. Test cut. 4. Observe cutting gap. 5. Adjust temperature until approx. 2 mm gap.", "text": "The setting process is simple and takes only a few minutes. First: set cutting speed – use approx. 450–500 mm/min for EPS and approx. 350–400 mm/min for XPS as a starting point. Second: load material and perform a short test cut. Third: observe the cutting gap – the distance between wire and material during cutting. Fourth: adjust temperature. If the gap is smaller than approx. 2 mm, increase temperature. If larger than approx. 2 mm, reduce temperature. Repeat until the cutting gap is consistently approx. 2 mm.", "image": { "id": 2, "alt": "Test cut being performed – wire temperature setting process", "caption": "A short test cut immediately shows whether the temperature is correct.", "position": "right" } }, { "id": "cutting-gap", "anchor": "optimal-cutting-gap", "type": "highlight", "headline": "The Optimal Cutting Gap: Approx. 2 mm", "ai_summary": "The ideal cutting gap is approx. 2 mm. The wire melts material away in front of it without touching it directly.", "text": "The cutting gap is the visible distance between the wire and the still unmelted material during cutting. The ideal value is approx. 2 mm. At this value the wire melts material away in front of it without touching it directly – the result is clean surfaces, sharp edges and high dimensional accuracy." }, { "id": "guidelines", "anchor": "cutting-speed-guidelines", "type": "list", "headline": "Cutting Speed Guidelines per Material", "ai_summary": "EPS: 450–500 mm/min. XPS: 350–400 mm/min. These values serve as starting points – temperature is then adjusted.", "items": [ { "text": "EPS / Styrofoam: approx. 450–500 mm/min – good starting point for setting" }, { "text": "XPS / Styrodur: approx. 350–400 mm/min – slower due to different heat behaviour" }, { "text": "EPP: similar to EPS, adjust depending on density" }, { "text": "Neopor: slower than EPS – graphite content cools the wire" }, { "text": "Higher density: reduce speed or increase temperature" }, { "text": "Longer wire: higher temperature needed due to greater heat loss" } ] }, { "id": "automatic-current-controller", "anchor": "automatic-current-controller", "type": "text_image", "headline": "Automatic Current Controller – Consistent Quality All Day", "ai_summary": "The automatic current controller compensates for mains voltage fluctuations and keeps wire temperature constant. Standard from CUT2500S, optional on smaller machines.", "text": "Mains voltage fluctuations can change wire temperature without the operator noticing. The result: varying cut quality throughout the day. The automatic current controller solves this problem. It regulates wire temperature using microprocessor control and automatically compensates for mains voltage fluctuations. It adapts to wire length and material. The result: consistent cut quality from morning to evening – regardless of the mains supply. From the CUT2500S the automatic current controller is standard, available as an option on smaller machines.", "image": { "id": 3, "alt": "Automatic current controller close-up – microprocessor control", "caption": "The automatic current controller – standard from CUT2500S.", "position": "left" } }, { "id": "common-mistakes", "anchor": "common-temperature-mistakes", "type": "text", "headline": "Common Mistakes in Temperature Setting", "ai_summary": "Typical mistakes: setting temperature too high for more speed, not readjusting after material change, skipping test cuts.", "text": "The most common mistake: setting temperature too high to increase cutting speed. The result is a cutting gap that is too large – material is thermally damaged, surfaces become rough and dimensional accuracy suffers. Another mistake: not readjusting temperature after a material change. Different materials and densities require different temperatures. And: no test cut before production. The test cut takes one minute and prevents an entire block becoming scrap." } ], "related_faq": { "headline": "Frequently Asked Questions", "items": [ { "question": "What temperature should I set the wire to?", "answer": "There is no fixed temperature value. The optimal temperature depends on material, density, wire length and cutting speed. Always set practically at the material: perform a test cut, observe the cutting gap, adjust temperature until approx. 2 mm gap is achieved." }, { "question": "What is the optimal cutting gap?", "answer": "The ideal cutting gap is approx. 2 mm. At this value the wire melts material away in front of it without touching it directly – clean surfaces and high dimensional accuracy result." }, { "question": "Why does my cut quality vary throughout the day?", "answer": "Mains voltage fluctuations can change wire temperature. An automatic current controller solves this problem – it keeps temperature constant regardless of the mains supply." }, { "question": "Do I need to readjust temperature after a material change?", "answer": "Yes. Different materials and densities require different temperatures. After every material change perform a short test cut and readjust temperature." } ] }, "related_topics": { "headline": "Related Topics", "items": [ { "title": "Cutting Speed Setting", "text": "Guidelines for EPS, XPS and other materials – and why travel speed is irrelevant.", "url": "/knowledge-hotwire-cutting-speed.html" }, { "title": "Avoid Waves When Cutting", "text": "Why waves appear and how they can be permanently prevented through correct settings.", "url": "/knowledge-hotwire-avoid-waves.html" }, { "title": "Short Wires Win", "text": "Why short wire lengths lead to better cut quality and easier temperature setting.", "url": "/knowledge-hotwire-short-wire-lengths.html" } ] }, "cta": { "headline": "Solve Setting Problems", "text": "We help with the correct temperature setting for your material and production – from real experience.", "button": { "label": "Get advice now", "url": "/contact.html" } } }

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