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A user prints TPU filament but notices frequent clogging and filament jams. Which change will most likely fix this?

medium📝 Analysis Q14 of 15
3D Printing - Materials for 3D Printing
A user prints TPU filament but notices frequent clogging and filament jams. Which change will most likely fix this?
AIncrease print speed to 80 mm/s
BLower nozzle temperature below 200°C
CReduce retraction distance and slow down print speed
DUse a smaller nozzle size
Step-by-Step Solution
Solution:

  1. Step 1: Identify causes of TPU clogging

    High retraction and fast speed can cause jams with flexible TPU filament.

  2. Step 2: Apply correct fixes

    Reducing retraction and slowing print speed helps filament flow smoothly and prevents jams.

  3. Final Answer:

    Reduce retraction distance and slow down print speed -> Option C

  4. Quick Check:

    Slow speed + less retraction = fewer jams [OK]
Quick Trick: Slow down and reduce retraction for TPU jams [OK]
Common Mistakes:
MISTAKES
  • Increasing speed worsens jams
  • Lowering temperature too much stops extrusion
  • Changing nozzle size doesn't fix TPU jams

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