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3D Printing Made Easy · July 2 · 22 min

Engineering Filament Tuning: Stringing and Flow Rate

Getting clean, dimensionally accurate prints in PETG, ABS, ASA and nylon requires attacking moisture and flow rate together, not just copying PLA recipes. In this episode you'll learn: ABS and ASA print at roughly 240°C to 260°C, keeping the melt liquid longer after retraction and worsening stringing. PETG, nylon, PA-CF, ABS and ASA are hygroscopic; absorbed water flashes to steam in the nozzle and sputters material during travel moves. In PrusaSlicer the flow control is called extrusion multiplier; in Bambu Studio and OrcaSlicer it is called flow ratio. Total flow equals the firmware flow multiplier times the slicer extrusion multiplier, and M221 overrides the firmware value at runtime. Bambu Lab documentation notes PLA flows easily, ABS and nylon are denser, PETG is sticky, TPU is elastic and viscous, and composite filaments are abrasive. Read the full guides on our site: Flow Rate Calibration: Finding the Magic Number for Every Filament · Stringing in Engineering Filaments: Complete Troubleshooting Watch on YouTube: 3D Printing Made Easy playlist We 3D-print custom props and game pieces for Z-AGENCY and TerraHunt. This show is our AI bonus channel: episodes are automatically generated audio editions of the articles we publish at printara3d.com, so you can follow our topics on the go.

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Getting clean, dimensionally accurate prints in PETG, ABS, ASA and nylon requires attacking moisture and flow rate together, not just copying PLA recipes.

In this episode you'll learn:

  • ABS and ASA print at roughly 240°C to 260°C, keeping the melt liquid longer after retraction and worsening stringing.
  • PETG, nylon, PA-CF, ABS and ASA are hygroscopic; absorbed water flashes to steam in the nozzle and sputters material during travel moves.
  • In PrusaSlicer the flow control is called extrusion multiplier; in Bambu Studio and OrcaSlicer it is called flow ratio.
  • Total flow equals the firmware flow multiplier times the slicer extrusion multiplier, and M221 overrides the firmware value at runtime.
  • Bambu Lab documentation notes PLA flows easily, ABS and nylon are denser, PETG is sticky, TPU is elastic and viscous, and composite filaments are abrasive.

Read the full guides on our site: Flow Rate Calibration: Finding the Magic Number for Every Filament · Stringing in Engineering Filaments: Complete Troubleshooting

Watch on YouTube: 3D Printing Made Easy playlist

We 3D-print custom props and game pieces for Z-AGENCY and TerraHunt.

This show is our AI bonus channel: episodes are automatically generated audio editions of the articles we publish at printara3d.com, so you can follow our topics on the go.

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