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During an FDM print, the filament keeps jamming inside the extruder. What is a common cause to check first?

medium📝 Analysis Q7 of 15
3D Printing - Fundamentals
During an FDM print, the filament keeps jamming inside the extruder. What is a common cause to check first?
ABuild platform temperature is too high
BNozzle is clogged or partially blocked
CFilament spool is empty
DCooling fan speed is too high
Step-by-Step Solution
Solution:
  1. Step 1: Understand causes of filament jams

    A clogged or partially blocked nozzle often causes filament jams by preventing smooth extrusion.
  2. Step 2: Evaluate other options

    Empty spool stops extrusion but is obvious; platform temp and fan speed rarely cause jams.
  3. Final Answer:

    Nozzle is clogged or partially blocked -> Option B
  4. Quick Check:

    Filament jam = Nozzle clog [OK]
Quick Trick: Check nozzle clog first if filament jams [OK]
Common Mistakes:
MISTAKES
  • Ignoring nozzle clog as cause
  • Checking build platform temp first
  • Assuming spool is empty without checking

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