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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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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).