{
  "opening": "The supplied comments blame a Bowden path. A comment says TPU needs a direct drive. A comment says to slow down and ease extruder tension. describes seating the Bowden tube against the gear. None of them gives a retraction distance. The sheets below are print temperatures and drying cycles, not a stringing recipe.",
  "question": "How do I stop TPU stringing and jamming?",
  "slug": "tpu_stringing",
  "useCase": "flexible",
  "useCaseLabel": "Flexible",
  "updated": "2026-10-25",
  "shortAnswer": "The supplied comments blame a Bowden path. A comment says TPU needs a direct drive. A comment says to slow down and ease extruder tension. describes seating the Bowden tube against the gear. None of them gives a retraction distance. The sheets below are print temperatures and drying cycles, not a stringing recipe.",
  "recommendedMaterials": [
    "tpu"
  ],
  "printerConsiderations": [
    "A comment says a Bowden setup is pushing a limp noodle, and says to slow the print and loosen tension so the filament does not jump out. It asks for no specific millimeters per second.",
    "Bambu TPU for AMS lists a max of 130 mm/s. Bambu TPU 95A HF and TPU 85A list 200 mm/s. Those caps are not a retraction length.",
    "Drying at 70 °C (158 °F) for 8 h is what these three Bambu sheets publish. The comments do not say to dry. Wet TPU is [drying TPU and nylon](/answers/dry_tpu_nylon), not a number invented from the stringing title."
  ],
  "pros": [
    "The path advice stays in the words the comments used. Direct drive, slower, less tension, tube against the gear.",
    "Manufacturer speeds are quoted only where the row stores them."
  ],
  "cons": [
    "No comments states a retraction distance, a wipe distance, or a temperature that stopped strings.",
    "Two of the source threads, including the ones titled as hairs and as an INDX jam, supplied no comments."
  ],
  "community": "The editorial summary says dry TPU, slow down, and reduce retraction. Slow down matches score 12. Drying and a retraction distance do not appear in the excerpts. r/ender3 118cl5l, score 18, says they bored the hole into the Bowden tube and cut a V so the tube meets the extruder gear, and that they have not had a jam since. Score 15 says they were told TPU needs a direct drive. r/FixMyPrint 11uamyy, score 12, says a Bowden is a limp noodle, to slow down, and to ease tension so the filament does not jump out. Score 5 says the post has zero info and asks what the print speed is. No excerpt was supplied for r/FixMyPrint 1alc4ek, r/BambuLab zw18r6, r/3Dprinting rzadh2, r/BambuLab 1xeggzr, or r/prusa3d 1xeova0.",
  "related": [
    "flex",
    "tpu_ams",
    "tpu_hardness",
    "stringing",
    "dry_tpu_nylon"
  ],
  "faq": [
    {
      "q": "How do I stop TPU stringing and jamming?",
      "a": "The supplied comments blame a Bowden path. A comment says TPU needs a direct drive. A comment says to slow down and ease extruder tension. describes seating the Bowden tube against the gear. None of them gives a retraction distance. The sheets below are print temperatures and drying cycles, not a stringing recipe."
    },
    {
      "q": "What retraction should I use?",
      "a": "These comments do not say. A comment says slow down and ease tension. asks for the print speed and does not receive one in the comments. [Stringing in general](/answers/stringing) is the retraction page for rigid filament. [How to print TPU](/answers/flex) is the flexible setup."
    },
    {
      "q": "Does a direct drive end the jam?",
      "a": "on r/ender3 says they were told it needs direct drive. on the same thread, describes a Bowden tube seated against the gear and says the jams stopped after that. Both are comments. [TPU in the AMS](/answers/tpu_ams) is a different path, with its own compatibility limits. [Shore hardness](/answers/tpu_hardness) is the stiffness number, not a jam procedure."
    }
  ],
  "sources": [
    {
      "title": "Bambu TPU 95A HF technical data sheet",
      "url": "https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_TPU_95A_HF_Technical_Data_Sheet.pdf?v=1700101819",
      "kind": "datasheet"
    },
    {
      "title": "Bambu TPU for AMS technical data sheet",
      "url": "https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_TPU_for_AMS_Technical_Data_Sheet.pdf?v=1730944629",
      "kind": "datasheet"
    },
    {
      "title": "Open Filament Database, NinjaTek NinjaFlex",
      "url": "https://api.openfilamentdatabase.org/api/v1/brands/ninjatek/materials/TPU/filaments/ninjaflex_tpu/index.json",
      "kind": "other"
    },
    {
      "title": "Community source, r/ender3 118cl5l",
      "url": "https://www.reddit.com/r/ender3/comments/118cl5l/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/FixMyPrint 11uamyy",
      "url": "https://www.reddit.com/r/FixMyPrint/comments/11uamyy/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/FixMyPrint 1alc4ek",
      "url": "https://www.reddit.com/r/FixMyPrint/comments/1alc4ek/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/BambuLab zw18r6",
      "url": "https://www.reddit.com/r/BambuLab/comments/zw18r6/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting rzadh2",
      "url": "https://www.reddit.com/r/3Dprinting/comments/rzadh2/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/BambuLab 1xeggzr",
      "url": "https://www.reddit.com/r/BambuLab/comments/1xeggzr/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/prusa3d 1xeova0",
      "url": "https://www.reddit.com/r/prusa3d/comments/1xeova0/",
      "kind": "reddit"
    }
  ],
  "recommendations": [
    {
      "rank": 1,
      "note": "Technical data sheet checked 18 October 2026 lists a nozzle of 220–240 °C (428–464 °F), a bed of 30–35 °C (86–95 °F), drying at 70 °C (158 °F) for 8 h, and a print speed up to 200 mm/s. Retraction is not stored.",
      "brand": "Bambu Lab",
      "product": "TPU 95A HF",
      "material": "TPU",
      "url": "/brand/bambu-lab/tpu-95a-hf",
      "nozzle": "220–240 °C (428–464 °F)",
      "bed": "30–35 °C (86–95 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_TPU_95A_HF_Technical_Data_Sheet.pdf?v=1700101819",
      "affiliateUrl": null
    },
    {
      "rank": 2,
      "note": "Technical data sheet checked 18 October 2026 lists a nozzle of 220–240 °C (428–464 °F), a bed of 30–35 °C (86–95 °F), drying at 70 °C (158 °F) for 8 h, and a print speed up to 130 mm/s. The lower speed cap is the sheet. It is not a retraction setting.",
      "brand": "Bambu Lab",
      "product": "TPU for AMS",
      "material": "TPU",
      "url": "/brand/bambu-lab/tpu-for-ams",
      "nozzle": "220–240 °C (428–464 °F)",
      "bed": "30–35 °C (86–95 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_TPU_for_AMS_Technical_Data_Sheet.pdf?v=1730944629",
      "affiliateUrl": null
    },
    {
      "rank": 3,
      "note": "Nozzle 200–250 °C (392–482 °F), bed 30–35 °C (86–95 °F), drying at 70 °C (158 °F) for 8 h, print speed up to 200 mm/s, Shore 85A stored on the row. A softer number is not a jam fix by itself.",
      "brand": "Bambu Lab",
      "product": "TPU 85A",
      "material": "TPU",
      "url": "/brand/bambu-lab/tpu-85a",
      "nozzle": "200–250 °C (392–482 °F)",
      "bed": "30–35 °C (86–95 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0645/5876/0155/files/Bambu_TPU_85A_Technical_Data_Sheet_a7233668-497b-487f-af8a-3adb49fafaa1.pdf?v=1741314674",
      "affiliateUrl": null
    },
    {
      "rank": 4,
      "note": "Open Filament Database, dataset imported 13 October 2026, lists a nozzle of 210–240 °C (410–464 °F) and a bed of 30–60 °C (86–140 °F). Drying, speed, and Shore hardness are not stored. The title is not a procedure.",
      "brand": "NinjaTek",
      "product": "NinjaFlex TPU",
      "material": "TPU",
      "url": "/brand/ninjatek/ninjaflex-tpu",
      "nozzle": "210–240 °C (410–464 °F)",
      "bed": "30–60 °C (86–140 °F)",
      "pricePerKg": null,
      "datasheetUrl": null,
      "affiliateUrl": null
    }
  ]
}