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Quick clearance test. — image 1
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Quick clearance test.

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Based on the design of J Jake 3D I slightly modified the test to print in 4 walls to also show layer change defects.

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Category
Test Models
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Creative Commons — Attribution

Based on a great idea of J Jake 3D https://www.prusaprinters.org/prints/127569-s-shaped-tolerance-test-01-04mm-in-002mm-increment I upped the challenge such taht the test also includes layer and line changes and thus zits will show up as fused points.

Start with printing J Jake 3D's test as its way quicker to print, when your tuning is such that 0.1 mm is achievable this is the next level challenge.

print settings:

  • 0.2 mm layer height
  • 0.4 mm outer layer width
  • 0.45 mm inner layer width

other settings as per your typical print settings.

My learnings how to improve clearance:

  • Properly tune Pressure/Linear Advance. This is probably the setting reducing the zits the most.
  • Your filament flow has to be tuned properly, any over-extrusion will close the gaps. I set outer layers to under-extrude 5% and inner layers to over-extrude 2% to achieve the best accuracy, esthetics and strength compromise.
  • Retraction may be set ~20% higher than the minimum outcome of retraction tests (http://retractioncalibration.com is my favorite retraction test).
Next challenge: https://www.prusaprinters.org/prints/129499-clearance-test-a-new-challenge-who-unlocks-the-006

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