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First layer calibration

UnverifiedAtrica3D20

First layer extrusion width calibration: prints a row of patches, each at a different first layer width, with the width labeled on top of each patch.

Version history
1.1.3latest Download

MIT · API 1.0.0+ · min PrusaSlicer 3.0.0-alpha1 · win, mac, linux · 3.8 KB

How to use it

  1. Select your printer, filament and nozzle as usual.

  2. Run Plugins → Calibration → First Layer Width.

  3. Set the range as a percentage of your nozzle size (default 100–200%) and the number of patches (default 6). You can also set patch size, first layer height, perimeters per patch, and whether to print labels.

  4. Slice and print.

  5. Enter the winning value under Print Settings → First layer extrusion width.

Reading the result

  • Gaps between lines: too wide for the nozzle to press out, or the hotend can’t keep up with the flow.

  • Ridges or a rough surface: too much plastic for the line spacing.

  • Smooth and even: that’s your value.

Good to know

  • To give each patch its own width, the plugin temporarily sets First layer extrusion width to 0 in your print settings. This change isn’t saved. Discard it after slicing the test.

  • Flow (extrusion multiplier) isn’t changed. Calibrate flow first for the best result.

  • Works with any printer profile.

  • Runs fully inside PrusaSlicer’s plugin sandbox, with no network access and no files written.

  • Built for the PrusaSlicer 3.0 preview. The plugin API is still experimental, so future PrusaSlicer updates may require a plugin update.