PETG pressure advance

Test prints / PETG: strength and fits

Six 6 mm bands of pressure advance, 0 to 0.08: pick the sharpest corners. The tower is small, so its walls print at about 26 mm/s.

Render of the PETG pressure advance test print as it stands on the bed, its bands tinted from amber (first) to blue (last). — Rendered from the STL, standing as it prints. Bands tinted from amber (first) to blue (last).

Toolpaths

Every extrusion move in the G-code, layer by layer. Drag the layer slider, scrub through the top layer, or play the print.

Toolpaths load when you open this view.

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Colour by

ShowTop layer onlyTravel moves

Read from the G-code that the printer gets. The clock adds each move at its programmed speed, without acceleration or travel, so it is shorter than the slicer's estimate.

Bands

Each band starts with one G-code command on its first layer. The slicing script reads the G-code back and stops if a command is missing or lands at the wrong height.

K 0.0831–37 mmM572 S0.08
K 0.0625–31 mmM572 S0.06
K 0.04719–25 mmM572 S0.047
K 0.03513–19 mmM572 S0.035
K 0.027–13 mmM572 S0.02
K 01–7 mmM572 S0

Base 0–1 mm at the first band's value

Settings

On top of the stack that the print jobs load. The printer tuning page shows that stack.

Printer	File	Changes
Prusa Core One+	`petg-pa (core-one-plus).bgcode`	`perimeters` 2`fill_density` 0%`top_solid_layers` 0

Procedure

What it is for. It sets pressure advance for PETG on the HF0.4. The correct value gives sharp corners with no gap after them.

Print. Print it. The bands run from the bottom: pressure advance 0, 0.02, 0.035, 0.047 (Prusa’s value for the HF0.4), 0.06 and 0.08.

Measure. Each band’s K value is engraved on the front face. Look at the corners of each band on the other three faces.

Pass. Pick the band with sharp corners and no gap after them.

Record. The pressure advance of that band.

In the tuning log

Flow and pressure advanceTo test