High Speed PLA on Prusa XL

Nozzle Temp

215 °C

Range: 190 – 220 °C

Bed Temp

60 °C

Range: 25 – 60 °C

Print Speed

150

mm/s · max 200

Layer Height

0.20

mm · max 0.28

Fan Speed

100 %

1st layer: 0 %

1st Layer Speed

25

mm/s

Retraction

0.8 mm

@ 35 mm/s

Nozzle Type

Brass

Standard

  Retraction Note

• Keep retraction at 0.8 mm on the Nextruder. If High Speed PLA strings, dry it and drop the nozzle 5 °C before adding retraction.

Settings

Recommended

Range

Nozzle Temperature

210 – 220 °C

190 – 220 °C

Bed Temperature

55 – 60 °C

25 – 60 °C

Print Speed

120 – 180 mm/s

up to 200 mm/s on this printer

First Layer Speed

20 – 30 mm/s

slower is better for adhesion

Layer Height

0.15 – 0.25 mm

0.10 – 0.28 mm

Fan Speed (Normal)

100 %

80 – 100 %

Fan Speed (1st Layer)

0 %

0 – 30 %

Retraction Distance

0.8 mm

Direct drive (Nextruder)

Retraction Speed

35 mm/s

30 – 40 mm/s

Nozzle Type

Brass (standard)

Brass is fine; hardened optional

Dry Filament

40 – 45 °C for 4 – 6 h

print from a dry box in humid weather

Enclosure

Not required

Not needed for PLA

Support Material

PVA, PETG (interface)

load it in a second toolhead

Wipe Tower Minimal Purge

15 mm³

35 mm³ when mixed with other materials

Printing Notes

High Speed PLA is modified to melt and extrude evenly at higher speeds. OzFDM rates it from 60 to 350 mm/s; on the XL we run it at 150 mm/s and cap print moves at 200 mm/s.

Strength drops across the layers: tensile strength is 45 – 49 MPa along the layers (X-Y) but 35 – 40 MPa between them (X-Z). Orient load-bearing parts so the force runs along the layers.

The XL runs Input Shaper using an accelerometer that Prusa calibrates at the factory, which is what lets it hold these speeds without the ringing an older machine would show.

Multi-tool: tool changes, not print speed, set the pace of a multi-colour XL job. Each change parks one toolhead, picks up the next and primes it on the wipe tower, so keep colour changes per layer to a minimum when time matters.

Slicer: PrusaSlicer with the Prusa XL printer profile and a 0.4 mm nozzle. Dry the filament at 40 – 45 °C for 4 – 6 h before a long print; every figure above assumes dry filament.

Troubleshooting

Rough walls or gaps at full speed: The hotend is running short of melted filament. Raise the nozzle to 220 °C or slow print moves to 120 mm/s.

Warped corners on large, fast prints: Add a brim, keep the bed at 60 °C and wash the sheet with warm soapy water.

Stringing: Dry at 40 – 45 °C for 4 – 6 h, then drop the nozzle 5 °C.