Max volumetric flowupdates live

21 mm³/s The single value Bambu Studio can’t guess for you

Effective top speed

250mm/s

you asked for 300

target 300 → clamped

Pressure advance K

0.02

starting point — refine on-machine

Flow ratio

0.98

Bambu base (inherited)

Retraction length

0.8mm

Bambu base (inherited)

hotend ceiling 21 mm³/s · Bambu default — KingRoon publishes none ⚠ clamped — capped below your target speed

KingRoon · Matte PLA Matte product page

Nozzle215 °C

Density1.31 g/cm³

DryingOven 50 °C / 8 h; AMS 2 Pro/HT 55 °C / 8 h; X1 bed 60–70 °C / 12 h

Mfr speednot published

Mfr bed50–65 °C

Tensile ≥42 MPa; HDT 58 °C; IZOD impact 5.9 kJ/m²; bending 80 MPa; flexural modulus 2825 MPa; melt index 5–8 g/10 min @ 190 °C; length 330–340 m on 1 kg spool; AMS-compatible plastic spool

manufacturer source ↗

Is this right for your spool?

Here's how sure we are — and what to watch.

H2DP values are provisional

These envelope/flow values still need verifying against Bambu's shipped profile (SPEC.md §10).

Against Bambu stock

flow 0.98 · ceiling 21 mm³/s

Source

product page · manufacturer ↗

Why these numbers

KingRoon Matte PLA starts from Bambu's PLA Basic reference; KingRoon's published specs are overlaid where available, and everything else stays at Bambu's calibrated default.

Tensile ≥42 MPa; HDT 58 °C; IZOD impact 5.9 kJ/m²; bending 80 MPa; flexural modulus 2825 MPa; melt index 5–8 g/10 min @ 190 °C; length 330–340 m on 1 kg spool; AMS-compatible plastic spool

Treat these as a starting point — run a flow-test cube and Bambu's Flow Dynamics calibration after import for the last few percent.

Open in the wizard → change printer, nozzle or speed

Download the KingRoon Matte PLA profile

A .zip with the Bambu Studio .json and a Markdown summary of every field.

Then calibrate in the slicer. Run Device → Calibration → Flow Dynamics after import to lock in the K-factor.